Thread: I cant get my java to run LOGICAL Error PLs help me urgent need submint on wednesday

i have attached my files pls help me urgent PLS!!!!!!!!!!

this are the likns

libry.java=http://www.mediafire.com/?e2gvdbye8zmopt1

libryGUI.java=http://www.mediafire.com/?39se210w06hireh


pls help

import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
public class libryGUI extends JFrame implements ActionListener
{
private JTabbedPane body;

private JPanel pUsername = new JPanel();
private JPanel pEnter = new JPanel();
private JPanel pDisplay = new JPanel();
private JPanel pSearch = new JPanel();
private JPanel pMiddle = new JPanel();
private int counter = 0;
private int counter2 = 2;
private JLabel lbltitle3,lbltitle4;//lblusername,//lblpassword
private JLabel lbltitle,lblbookid,lblbookname,lblamountofbook,lbl typeofbook,lblbookarriveddate,lblprice;
private JLabel lbltitle1,lblbookid1,lblbookname1,lblamountofbook1 ,lbltypeofbook1,lblbookarriveddate1,lblprice1;
private JLabel lbltitle2,lblbookid2,lblbookname2,lblamountofbook2 ,lbltypeofbook2,lblbookarriveddate2,lblprice2;
private JLabel lblbookid21,lblbookname21,lblamountofbook21,lbltyp eofbook21,lblbookarriveddate21,lblprice21;
private JLabel lblbookid211,lblbookname211,lblamountofbook211,lbl typeofbook211,lblbookarriveddate211,lblprice211;
private JLabel lblblank1,lblblank2,lblblank3,lblblank,lblblank4,l blblank5,lblblank6,lblblank7,lblblank8,lblblank9,l blblank10,lblblank11,lblblank12,lblblank13;
private JTextField txtid,txtname,txtprice,txtusername,txtpassword,txt amountofbook,txtbookarriveddate,txtid2,txttypeofbo ok;
private JButton btnRest, btnSave, btnNext,btnPrevious,btnSearch,btnDisplay,btnEnter, btnSearch1,btnEnter1,btnExit,btnReturn;
String choice;
char []TempGra=new char[5];
private boolean flag,flag2=false,flag3=false;
libry[] libryRec;
public libryGUI()
{
super("Library Record");
body = new JTabbedPane();
Font customFont=new Font("Freestyle Script",Font.PLAIN,20);
Font customFont2=new Font("Arial",Font.BOLD,12);
Color customBlue=new Color(50,150,255);
Color customRed=new Color(255,150,150);
Color customYellow=new Color(255,200,100);
Color customGray=new Color(230,230,230);

//////////LABLE pEntry/////////////

lbltitle=new JLabel("LIBRARY STUDENT RECORD");
lblbookid=new JLabel(counter+1+".Book ID");
lblamountofbook=new JLabel("Amount Of Books");
lbltypeofbook=new JLabel("Type Of Book");
lblbookarriveddate=new JLabel("Book Arrived Date");
lblprice=new JLabel("Price");

//////////LABLE pSearch/////////////

lbltitle1=new JLabel("LIBRARY SEARCH RECORD");
lblbookid1=new JLabel("Book ID");
lblamountofbook1=new JLabel("Amount Of Books");
lbltypeofbook1=new JLabel("Type Of Book");
lblbookarriveddate1=new JLabel("Book Arrived Date");
lblprice1=new JLabel("Price");

//////////LABLE pDisplay/////////////

lbltitle2=new JLabel("LIBRARY DISPLAY RECORD");
lblbookid2=new JLabel(counter2+1+".Book ID");
lblamountofbook2=new JLabel("Amount Of Books");
lbltypeofbook2=new JLabel("Type Of Book");
lblbookarriveddate2=new JLabel("Book Arrived Date");
lblprice2=new JLabel("Price");

lblbookid21=new JLabel();
lblamountofbook21=new JLabel();
lbltypeofbook21=new JLabel();
lblbookarriveddate21=new JLabel();
lblprice21=new JLabel();

lblbookid211=new JLabel();
lblamountofbook21=new JLabel();
lbltypeofbook211=new JLabel();
lblbookarriveddate211=new JLabel();
lblprice211=new JLabel();

//////////LABLE pUsername/////////////

lbltitle3=new JLabel("Welcome TO Libray Record");
lbltitle4=new JLabel("Please Choose An Option");
//lblusername=new JLabel("User Name");
//lblpassword=new JLabel("Password");

//////////LABLE BLANK/////////////

lblblank1=new JLabel();
lblblank2=new JLabel();
lblblank3=new JLabel();
lblblank=new JLabel();
lblblank4=new JLabel();
lblblank5=new JLabel();
lblblank6=new JLabel();
lblblank7=new JLabel();
lblblank8=new JLabel();
lblblank9=new JLabel();
lblblank10=new JLabel();
lblblank10=new JLabel();
lblblank12=new JLabel();
lblblank13=new JLabel();

//////////TEXT FIELD/////////////

txtid=new JTextField("",10);
txtname=new JTextField("",20);
txtprice=new JTextField("",10);
//txtusername=new JTextField("",15);
//txtpassword=new JTextField("",15);
txtamountofbook=new JTextField("",10);
txtbookarriveddate=new JTextField("",10);
txtid2=new JTextField("",10);

//////////BUTTON/////////////

btnRest=new JButton("RESET");
btnRest.setFont(customFont2);
btnRest.setBackground(customBlue);
btnRest.setForeground(Color.white);
btnRest.addActionListener(this);
btnRest.setEnabled(true);

btnSave=new JButton("SAVE");
btnSave.setFont(customFont2);
btnSave.setBackground(customBlue);
btnSave.setForeground(Color.white);
btnSave.addActionListener(this);
btnSave.setEnabled(true);

btnNext=new JButton("NEXT");
btnNext.setFont(customFont2);
btnNext.setBackground(customBlue);
btnNext.setForeground(Color.white);
btnNext.addActionListener(this);
btnNext.setEnabled(false);

btnPrevious=new JButton("PREVIOUS");
btnPrevious.setFont(customFont2);
btnPrevious.setBackground(customBlue);
btnPrevious.setForeground(Color.white);
btnPrevious.addActionListener(this);
btnPrevious.setEnabled(false);

btnSearch=new JButton("SEARCH");
btnSearch.setFont(customFont2);
btnSearch.setBackground(customBlue);
btnSearch.setForeground(Color.white);
btnSearch.addActionListener(this);
btnSearch.setEnabled(true);

/* btnEnter=new JButton("Enter");
btnEnter.setFont(customFont2);
btnEnter.setBackground(customBlue);
btnEnter.setForeground(Color.white);
btnEnter.addActionListener(this);
btnEnter.setEnabled(true);
*/

btnDisplay=new JButton("Display record");
btnDisplay.setFont(customFont2);
btnDisplay.setBackground(customBlue);
btnDisplay.setForeground(Color.white);
btnDisplay.addActionListener(this);
btnDisplay.setEnabled(false);

btnSearch1=new JButton("Search record");
btnSearch1.setFont(customFont2);
btnSearch1.setBackground(customBlue);
btnSearch1.setForeground(Color.white);
btnSearch1.addActionListener(this);
btnSearch1.setEnabled(true);

btnEnter1=new JButton("Enter record");
btnEnter1.setFont(customFont2);
btnEnter1.setBackground(customBlue);
btnEnter1.setForeground(Color.white);
btnEnter1.addActionListener(this);
btnEnter1.setEnabled(true);

btnExit=new JButton("Exit");
btnExit.setFont(customFont2);
btnExit.setBackground(customBlue);
btnExit.setForeground(Color.white);
btnExit.addActionListener(this);
btnExit.setEnabled(true);

btnReturn=new JButton("Return");
btnReturn.setFont(customFont2);
btnReturn.setBackground(customBlue);
btnReturn.setForeground(Color.white);
btnReturn.addActionListener(this);
btnReturn.setEnabled(true);

////////// LIBRY REC /////////////

String input = JOptionPane.showInputDialog("Enter Number of Items in the arry");
int num = Integer.parseInt(input);
libryRec = new libry[num];
for (int j=0;j<libryRec.length;j++)
libryRec[j]=new libry();

////////// PANNAL 1 /////////////

/*pUsername.setLayout(new GridLayout(7,2,0,2));
lbltitle3.setBackground(customBlue);
lbltitle3.setForeground(Color.black);
lbltitle3.setFont(customFont);
lblblank.setBackground(customBlue);
lblblank1.setBackground(customBlue);
pUsername.add(lbltitle3);
pUsername.add(lblblank);
pUsername.add(lblusername);
pUsername.add(txtusername);
pUsername.add(lblpassword);
pUsername.add(txtpassword);
pUsername.add(lblblank1);
pUsername.add(btnEnter);
*/

////////// PANNAL 2 /////////////

/* pMiddle.setLayout(new GridLayout(5,0,0,0));
lbltitle4.setBackground(customBlue);
lbltitle4.setForeground(Color.black);
lbltitle4.setFont(customFont);
lblblank4.setBackground(customBlue);
lblblank5.setBackground(customBlue);
pMiddle.add(lbltitle4);
pMiddle.add(lblblank4);
pMiddle.add(btnEnter1);
pMiddle.add(btnSearch1);
pMiddle.add(btnDisplay);
pMiddle.add(lblblank5);
*/
////////// PANNAL 3 /////////////

pEnter.setLayout(new GridLayout(13,2,0,2));
lbltitle.setBackground(customBlue);
lbltitle.setForeground(Color.black);
lbltitle.setFont(customFont);
lblblank2.setBackground(customBlue);
lblblank3.setBackground(customBlue);
pEnter.add(lbltitle);
pEnter.add(lblblank2);
pEnter.add(lblbookid);
pEnter.add(txtid);
pEnter.add(lblamountofbook);
pEnter.add(txtamountofbook);
pEnter.add(lbltypeofbook);
pEnter.add(txtname);
pEnter.add(lblbookarriveddate);
pEnter.add(txtbookarriveddate);
pEnter.add(lblprice);
pEnter.add(txtprice);
pEnter.add(btnNext);
pEnter.add(btnReturn);


////////// PANNAL 3 /////////////

pDisplay.setLayout(new GridLayout(13,2,0,2));
lbltitle2.setBackground(customBlue);
lbltitle2.setForeground(Color.black);
lbltitle2.setFont(customFont);
lblblank6.setBackground(customBlue);
lblblank7.setBackground(customBlue);
lblblank8.setBackground(customBlue);
pDisplay.add(lbltitle2);
pDisplay.add(lblblank6);
pDisplay.add(lblbookid2);
pDisplay.add(lblbookid21);
pDisplay.add(lblamountofbook2);
pDisplay.add(lblamountofbook21);
pDisplay.add(lbltypeofbook2);
pDisplay.add(lbltypeofbook21);
pDisplay.add(lblbookarriveddate2);
pDisplay.add(lblbookarriveddate21);
pDisplay.add(lblprice2);
pDisplay.add(lblprice21);
pDisplay.add(lblblank8);
pDisplay.add(btnNext);
pDisplay.add(btnPrevious);
pDisplay.add(btnExit);
pDisplay.add(btnReturn);

////////// PANNAL 4 /////////////

pSearch.setLayout(new GridLayout(15,2,0,2));
lbltitle1.setBackground(customBlue);
lbltitle1.setForeground(Color.black);
lblblank9.setBackground(customBlue);
lblblank10.setBackground(customBlue);
lblblank11.setBackground(customBlue);
pSearch.add(lbltitle1);
pSearch.add(lblblank9);
pSearch.add(lblbookid1);
pSearch.add(txtid2);
pSearch.add(btnSearch);
pSearch.add(lblblank10);
pSearch.add(lblamountofbook1);
pSearch.add(lblamountofbook211);
pSearch.add(lbltypeofbook1);
pSearch.add(lbltypeofbook211);
pSearch.add(lblbookarriveddate1);
pSearch.add(lblbookarriveddate211);
pSearch.add(lblprice1);
pSearch.add(lblprice211);
pSearch.add(lblblank11);
pSearch.add(btnRest);
pSearch.add(btnReturn);
body.addTab("LOGIN",null,pUsername,"Login Page");
body.addTab("ENTER",null,pEnter,"Enter Page");
body.addTab("DISPLAY",null,pDisplay,"Display Page");
body.addTab("SEARCH",null,pSearch,"Login Page");
body.setBackgroundAt(0,customBlue);
body.setBackgroundAt(1,customRed);
body.setBackgroundAt(2,customYellow);
body.setBackground(customGray);
add(body);
setSize(580,430);
setVisible(true);
}

public static void main (String args[])throws AWTException
{
libryGUI adm = new libryGUI();

adm.addWindowListener(new WindowAdapter()
{
public void windowClosing( WindowEvent e)
{
System.exit(0);
}
}

);
}

public void actionPerformed(ActionEvent ae)
{
if(ae.getSource()==btnRest)
Reset();
if (ae.getSource()==btnSave)
{
if(flag==false)
{
Validate();
}
if(flag==true)
{
Save();
Reset();
if (counter==0)
btnNext.setEnabled(false);
else if (flag3 == true);
btnNext.setEnabled(true);
counter++;
if(counter==1){

btnDisplay.setEnabled(true);
btnSearch.setEnabled(true);
}

lblbookid.setText(counter+1+".Book ID");
if(counter >=libryRec.length)
{
counter = 0;
lblbookid.setText(counter+1+".Book ID");
}
flag =false;
}
}
if (ae.getSource()==btnDisplay)
{
Display();
flag3 = true;
btnDisplay.setEnabled(false);
if(counter == 1)
btnNext.setEnabled(false);
if(counter !=1)
btnNext.setEnabled(true);
}
if (ae.getSource()==btnNext)
{
counter2++;
if(counter2==(counter-1))
{
btnNext.setEnabled(false);
}
else
btnNext.setEnabled(true);
if(counter2 == 4)
btnNext.setEnabled(false);
btnPrevious.setEnabled(true);
lblbookid2.setText(counter2+1+".Book ID");
Display();
}
if(ae.getSource()==btnPrevious)
{
counter2--;
if(counter2==0)
btnPrevious.setEnabled(false);
else
btnPrevious.setEnabled(true);
btnNext.setEnabled(true);
lblbookid2.setText(counter2+1+".Book ID");
Display();
}
if(ae.getSource()==btnSearch)
{
Validate2();
Search();
}
}//end Action Performed
public void Reset()
{
txtid.setText("");
txtid2.setText("");
txtname.setText("");
txtprice.setText("");
//txtusername.setText("");
//txtpassword.setText("");
txtamountofbook.setText("");
txtbookarriveddate.setText("");
txttypeofbook.setText("");

}//end of rest

public void Save()
{
String name,username,password,id,tob,temp,temp2,temp3,tem p4;
int aob,bad;
double price;

id=txtid.getText();
libryRec[counter].setBkid(id);
name = txtname.getText();
libryRec[counter].setBknm(name);
temp2 = txtprice.getText();
price=Double.parseDouble(temp2);
libryRec[counter].setPrice(price);
//username = txtusername.getText();
//libryRec[counter].setUsername(username);
//password = txtpassword.getText();
//libryRec[counter].setPassword(password);
temp = txtamountofbook.getText();
aob=Integer.parseInt(temp);
libryRec[counter].setAmtbk(aob);
temp4 = txtbookarriveddate.getText();
bad=Integer.parseInt(temp4);
libryRec[counter].setArrdate(bad);
tob = txttypeofbook.getText();
libryRec[counter].setTypbk(tob);

}// end of save

public void Display()
{
int temp1;
String temp2,temp4;
double temp3;

lblbookid2.setText(libryRec[counter2].getBkid());
lblbookname2.setText(libryRec[counter2].getBknm());
temp1=libryRec[counter2].getAmtbk();
temp2=Integer.toString(temp1);
lblamountofbook1.setText(temp2);
lbltypeofbook2.setText(libryRec[counter2].getTypbk());
temp1=libryRec[counter2].getArrdate();
temp2=Integer.toString(temp1);
lblbookarriveddate2.setText (temp2);
temp3=libryRec[counter2].getPrice();
temp4=Double.toString(temp1);
lblprice2.setText(temp2);
}
public void Search()
{
String str,temp2;
int count=0,temp1;
double temp3;
flag2=true;
String[] idArray = new String[libryRec.length];
str=txtid2.getText();
for(int k=0;k<libryRec.length;k++)
{
idArray[k]=libryRec[k].getBkid();
if(idArray[k].equals(str))
{
flag=true;
lblbookid211.setText(libryRec[k].getBkid());
lblbookname211.setText(libryRec[k].getBknm());
temp1=libryRec[k].getAmtbk();
temp2=Integer.toString(temp1);
lblamountofbook211.setText(temp2);
lbltypeofbook211.setText(libryRec[k].getTypbk());
temp1=libryRec[k].getArrdate();
temp2=Integer.toString(temp1);
lblbookarriveddate211.setText(temp2);
temp3=libryRec[k].getPrice();
temp2=Double.toString(temp1);
lblprice211.setText(temp2);
break;

}
else if(!(idArray[k].equals(str)))
flag2=false;
}
if(flag2==false)
JOptionPane.showMessageDialog(this,"Record Not Found");
}//End of search

public void Validate() throws ArithmeticException
{
flag=false;

if(txtid.getText().equals("")||txtname.getText().e quals("")||txtprice.getText().equals("")||txtusern ame.getText().equals("")
||txtpassword.getText().equals("")||txtamountofboo k.getText().equals("")||txtbookarriveddate.getText ().equals("")||
txttypeofbook.getText().equals(""))
{
JOptionPane.showMessageDialog(this,"Please Fill In The Blanks:");
}
else if(!txtname.getText().matches("([a-zA-Z]+|[a-zA-Z]+\\s[a-zA-Z]+)*"))
{
JOptionPane.showMessageDialog(this,"Invalid Name.");
txtname.requestFocus();
}
else if(!txtusername.getText().matches("([a-zA-Z]+|[a-zA-Z]+\\s[a-zA-Z]+)*"))
{
JOptionPane.showMessageDialog(this,"Invalid Username.");
txtusername.requestFocus();
}


}//end fo validate 1

public void Validate2()
{
if(txtid2.getText().equals(""))
{
JOptionPane.showMessageDialog(this,"Please enter Search ID");
txtid2.requestFocus();
}
else if(txtid2.getText().matches("\\d{8}"))
{
JOptionPane.showMessageDialog(this,"Invalid ID Format.");
txtid2.requestFocus();
}
}//Validte 2

}








Error:

--------------------Configuration: <Default>--------------------
Exception in thread "main" java.lang.NullPointerException
at libryGUI.<init>(libryGUI.java:292)
at libryGUI.main(libryGUI.java:325)

Process completed.

bro thx for the help man relay now it can work my silly mistake but 1 mroe help pls i cant use my save button man so sad why? it dosnt save my records and the counter is still at 1 pls help urgent PLS!!!!!!!!!!

import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
public class libryGUI extends JFrame implements ActionListener
{
	private JTabbedPane body;
 
	private JPanel pUsername = new JPanel();
	private JPanel pEnter = new JPanel();
	private JPanel pDisplay = new JPanel();
	private JPanel pSearch = new JPanel();
	private JPanel pMiddle = new JPanel();
	private int counter = 0;
	private int counter2 = 2;
	private JLabel lbltitle3,lbltitle4;//lblusername,//lblpassword
	private JLabel lbltitle,lblbookid,lblbookname,lblamountofbook,lbltypeofbook,lblbookarriveddate,lblprice;
	private JLabel lbltitle1,lblbookid1,lblbookname1,lblamountofbook1,lbltypeofbook1,lblbookarriveddate1,lblprice1;
	private JLabel lbltitle2,lblbookid2,lblbookname2,lblamountofbook2,lbltypeofbook2,lblbookarriveddate2,lblprice2;
	private JLabel lblbookid21,lblbookname21,lblamountofbook21,lbltypeofbook21,lblbookarriveddate21,lblprice21;
	private JLabel lblbookid211,lblbookname211,lblamountofbook211,lbltypeofbook211,lblbookarriveddate211,lblprice211;
	private JLabel lblblank1,lblblank2,lblblank3,lblblank,lblblank4,lblblank5,lblblank6,lblblank7,lblblank8,lblblank9,lblblank10,lblblank11,lblblank12,lblblank13,lblblank14;
	private JTextField txtid,txtname,txtprice,txtusername,txtpassword,txtamountofbook,txtbookarriveddate,txtid2,txttypeofbook;
	private JButton btnRest, btnSave, btnNext,btnPrevious,btnSearch,btnDisplay,btnEnter,btnSearch1,btnEnter1,btnExit,btnReturn;
	String choice;
	char []TempGra=new char[5];
	private boolean flag,flag2=false,flag3=false;
	libry[] libryRec;
	public libryGUI()
	{
		super("Library Record");
		body = new JTabbedPane();
		Font customFont=new Font("Freestyle Script",Font.PLAIN,20);
		Font customFont2=new Font("Arial",Font.BOLD,12);
		Color customBlue=new Color(50,150,255);
		Color customRed=new Color(255,150,150);
		Color customYellow=new Color(255,200,100);
		Color customGray=new Color(230,230,230);
 
		//////////LABLE pEntry/////////////
 
		lbltitle=new JLabel("LIBRARY STUDENT RECORD");
		lblbookid=new JLabel(counter+1+".Book ID");
		lblamountofbook=new JLabel("Amount Of Books");
		lbltypeofbook=new JLabel("Type Of Book");
		lblbookarriveddate=new JLabel("Book Arrived Date");
		lblprice=new JLabel("Price");
 
			//////////LABLE pSearch/////////////
 
		lbltitle1=new JLabel("LIBRARY SEARCH RECORD");
		lblbookid1=new JLabel("Book ID");
		lblamountofbook1=new JLabel("Amount Of Books");
		lbltypeofbook1=new JLabel("Type Of Book");
		lblbookarriveddate1=new JLabel("Book Arrived Date");
	    lblprice1=new JLabel("Price");
 
	    	//////////LABLE pDisplay/////////////
 
		lbltitle2=new JLabel("LIBRARY DISPLAY RECORD");
		lblbookid2=new JLabel(counter2+1+".Book ID");
		lblamountofbook2=new JLabel("Amount Of Books");
		lbltypeofbook2=new JLabel("Type Of Book");
		lblbookarriveddate2=new JLabel("Book Arrived Date");
		lblprice2=new JLabel("Price");
 
		lblbookid21=new JLabel();
		lblamountofbook21=new JLabel();
		lbltypeofbook21=new JLabel();
		lblbookarriveddate21=new JLabel();
		lblprice21=new JLabel();
 
		lblbookid211=new JLabel();
		lblamountofbook211=new JLabel();
		lbltypeofbook211=new JLabel();
		lblbookarriveddate211=new JLabel();
		lblprice211=new JLabel();
 
			//////////LABLE pUsername/////////////
 
		lbltitle3=new JLabel("Welcome TO Libray Record");
		lbltitle4=new JLabel("Please Choose An Option");
		//lblusername=new JLabel("User Name");
		//lblpassword=new JLabel("Password");
 
			//////////LABLE BLANK/////////////
 
		lblblank1=new JLabel();
		lblblank2=new JLabel();
		lblblank3=new JLabel();
		lblblank=new JLabel();
		lblblank4=new JLabel();
		lblblank5=new JLabel();
		lblblank6=new JLabel();
		lblblank7=new JLabel();
		lblblank8=new JLabel();
		lblblank9=new JLabel();
		lblblank11=new JLabel();
		lblblank10=new JLabel();
		lblblank12=new JLabel();
		lblblank13=new JLabel();
		lblblank14=new JLabel();
 
		//////////TEXT FIELD/////////////
 
		txtid=new JTextField("",10);
		txtname=new JTextField("",20);
		txtprice=new JTextField("",10);
		//txtusername=new JTextField("",15);
		//txtpassword=new JTextField("",15);
		txtamountofbook=new JTextField("",10);
		txtbookarriveddate=new JTextField("",10);
		txtid2=new JTextField("",10);
 
		//////////BUTTON/////////////
 
		btnRest=new JButton("RESET");
		btnRest.setFont(customFont2);
		btnRest.setBackground(customBlue);
		btnRest.setForeground(Color.white);
		btnRest.addActionListener(this);
		btnRest.setEnabled(true);
 
		btnSave=new JButton("SAVE");
		btnSave.setFont(customFont2);
		btnSave.setBackground(customBlue);
		btnSave.setForeground(Color.white);
		btnSave.addActionListener(this);
 
 
		btnNext=new JButton("NEXT");
		btnNext.setFont(customFont2);
		btnNext.setBackground(customBlue);
		btnNext.setForeground(Color.white);
		btnNext.addActionListener(this);
		btnNext.setEnabled(false);
 
		btnPrevious=new JButton("PREVIOUS");
		btnPrevious.setFont(customFont2);
		btnPrevious.setBackground(customBlue);
		btnPrevious.setForeground(Color.white);
		btnPrevious.addActionListener(this);
		btnPrevious.setEnabled(false);
 
		btnSearch=new JButton("SEARCH");
		btnSearch.setFont(customFont2);
		btnSearch.setBackground(customBlue);
		btnSearch.setForeground(Color.white);
		btnSearch.addActionListener(this);
		btnSearch.setEnabled(false);
 
	/*	btnEnter=new JButton("Enter");
		btnEnter.setFont(customFont2);
		btnEnter.setBackground(customBlue);
		btnEnter.setForeground(Color.white);
		btnEnter.addActionListener(this);
		btnEnter.setEnabled(true);
	*/
 
		btnDisplay=new JButton("Display record");
		btnDisplay.setFont(customFont2);
		btnDisplay.setBackground(customBlue);
		btnDisplay.setForeground(Color.white);
		btnDisplay.addActionListener(this);
		btnDisplay.setEnabled(false);
/*
		btnSearch1=new JButton("Search record");
		btnSearch1.setFont(customFont2);
		btnSearch1.setBackground(customBlue);
		btnSearch1.setForeground(Color.white);
		btnSearch1.addActionListener(this);
		btnSearch1.setEnabled(true);
 
		btnEnter1=new JButton("Enter record");
		btnEnter1.setFont(customFont2);
		btnEnter1.setBackground(customBlue);
		btnEnter1.setForeground(Color.white);
		btnEnter1.addActionListener(this);
		btnEnter1.setEnabled(true);
 
		btnExit=new JButton("Exit");
		btnExit.setFont(customFont2);
		btnExit.setBackground(customBlue);
		btnExit.setForeground(Color.white);
		btnExit.addActionListener(this);
		btnExit.setEnabled(true);
 
		btnReturn=new JButton("Return");
		btnReturn.setFont(customFont2);
		btnReturn.setBackground(customBlue);
		btnReturn.setForeground(Color.white);
		btnReturn.addActionListener(this);
		btnReturn.setEnabled(true);
*/
		////////// LIBRY REC /////////////
 
		String input = JOptionPane.showInputDialog("Enter Number of Items in the arry");
			int num = Integer.parseInt(input);
			libryRec = new libry[num];
			for (int j=0;j<libryRec.length;j++)
				libryRec[j]=new libry();
 
		////////// PANNAL 1 /////////////
 
		/*pUsername.setLayout(new GridLayout(7,2,0,2));
		lbltitle3.setBackground(customBlue);
		lbltitle3.setForeground(Color.black);
		lbltitle3.setFont(customFont);
		lblblank.setBackground(customBlue);
		lblblank1.setBackground(customBlue);
		pUsername.add(lbltitle3);
		pUsername.add(lblblank);
		pUsername.add(lblusername);
		pUsername.add(txtusername);
		pUsername.add(lblpassword);
		pUsername.add(txtpassword);
		pUsername.add(lblblank1);
		pUsername.add(btnEnter);
	*/
 
		////////// PANNAL 2 /////////////
 
	/*	pMiddle.setLayout(new GridLayout(5,0,0,0));
		lbltitle4.setBackground(customBlue);
		lbltitle4.setForeground(Color.black);
		lbltitle4.setFont(customFont);
		lblblank4.setBackground(customBlue);
		lblblank5.setBackground(customBlue);
		pMiddle.add(lbltitle4);
		pMiddle.add(lblblank4);
		pMiddle.add(btnEnter1);
		pMiddle.add(btnSearch1);
		pMiddle.add(btnDisplay);
		pMiddle.add(lblblank5);
	*/
		////////// PANNAL 3 /////////////
 
		pEnter.setLayout(new GridLayout(20,2,0,2));
		lbltitle.setBackground(customBlue);
		lbltitle.setForeground(Color.black);
		lbltitle.setFont(customFont);
		lblblank2.setBackground(customBlue);
		lblblank14.setBackground(customBlue);
		pEnter.add(lbltitle);
		pEnter.add(lblblank2);
		pEnter.add(lblbookid);
		pEnter.add(txtid);
		pEnter.add(lblamountofbook);
		pEnter.add(txtamountofbook);
		pEnter.add(lbltypeofbook);
		pEnter.add(txtname);
		pEnter.add(lblbookarriveddate);
		pEnter.add(txtbookarriveddate);
		pEnter.add(lblprice);
		pEnter.add(txtprice);
		pEnter.add(lblblank14);
		pEnter.add(btnSave);
		pEnter.add(btnRest);
 
 
		////////// PANNAL 3 /////////////
 
		pDisplay.setLayout(new GridLayout(20,2,0,2));
		lbltitle2.setBackground(customBlue);
		lbltitle2.setForeground(Color.black);
		lbltitle2.setFont(customFont);
		lblblank6.setBackground(customBlue);
		lblblank7.setBackground(customBlue);
		lblblank8.setBackground(customBlue);
		pDisplay.add(lbltitle2);
		pDisplay.add(lblblank6);
		pDisplay.add(lblbookid2);
		pDisplay.add(lblbookid21);
		pDisplay.add(lblamountofbook2);
		pDisplay.add(lblamountofbook21);
		pDisplay.add(lbltypeofbook2);
		pDisplay.add(lbltypeofbook21);
		pDisplay.add(lblbookarriveddate2);
		pDisplay.add(lblbookarriveddate21);
		pDisplay.add(lblprice2);
		pDisplay.add(lblprice21);
		pDisplay.add(lblblank8);
		pDisplay.add(btnNext);
		pDisplay.add(btnPrevious);
		pDisplay.add(btnDisplay);
		//pDisplay.add(btnReturn);
 
		////////// PANNAL 4 /////////////
 
		pSearch.setLayout(new GridLayout(20,3,0,3));
		lbltitle1.setBackground(customBlue);
		lbltitle1.setForeground(Color.black);
		lblblank9.setBackground(customBlue);
		lblblank10.setBackground(customBlue);
		lblblank11.setBackground(customBlue);
		pSearch.add(lbltitle1);
		pSearch.add(lblblank9);
		pSearch.add(lblbookid1);
		pSearch.add(txtid2);
		pSearch.add(btnSearch);
		pSearch.add(lblblank10);
		pSearch.add(lblamountofbook1);
		pSearch.add(lblamountofbook211);
		pSearch.add(lbltypeofbook1);
		pSearch.add(lbltypeofbook211);
		pSearch.add(lblbookarriveddate1);
		pSearch.add(lblbookarriveddate211);
		pSearch.add(lblprice1);
		pSearch.add(lblprice211);
		pSearch.add(lblblank11);
	//	pSearch.add(btnRest);
	//	pSearch.add(btnReturn);
		//body.addTab("LOGIN",null,pUsername,"Login Page");
		body.addTab("ENTER",null,pEnter,"Enter Page");
		body.addTab("DISPLAY",null,pDisplay,"Display Page");
		body.addTab("SEARCH",null,pSearch,"Login Page");
		body.setBackgroundAt(0,customBlue);
		body.setBackgroundAt(1,customRed);
		body.setBackgroundAt(2,customYellow);
		body.setBackground(customGray);
		add(body);
		setSize(580,430);
		setVisible(true);
}
 
public static void main (String args[])throws AWTException
{
	libryGUI adm = new libryGUI();
 
	adm.addWindowListener(new WindowAdapter()
	{
		public void windowClosing( WindowEvent e)
		{
			System.exit(0);
		}
	}
 
);
}
 
public void actionPerformed(ActionEvent ae)
{
	if(ae.getSource()==btnRest)
		Reset();
		if (ae.getSource()==btnSave)
		{
			if(flag==false)
			{
				Validate();
			}
			if(flag==true)
			{
				Save();
				Reset();
					if (counter==0)
						btnNext.setEnabled(false);
					else if (flag3 == true);
						btnNext.setEnabled(true);
					counter++;
					if(counter==1)
					{
						btnDisplay.setEnabled(true);
						btnSearch.setEnabled(true);
					}
 
			lblbookid.setText(counter+1+".Book ID");
				if(counter >=libryRec.length)
				{
					counter = 0;
					lblbookid.setText(counter+1+".Book ID");
				}
 
				flag =false;
		}
}
	if (ae.getSource()==btnDisplay)
	{
		Display();
		flag3 = true;
		btnDisplay.setEnabled(false);
	if(counter == 1)
		btnNext.setEnabled(false);
	if(counter !=1)
		btnNext.setEnabled(true);
}
	if (ae.getSource()==btnNext)
	{
		counter2++;
		if(counter2==(counter-1))
		{
				btnNext.setEnabled(false);
		}
		else
				btnNext.setEnabled(true);
		if(counter2 == 4)
				btnNext.setEnabled(false);
			btnPrevious.setEnabled(true);
			lblbookid2.setText(counter2+1+".Book ID");
			Display();
	}
	if(ae.getSource()==btnPrevious)
	{
		counter2--;
		if(counter2==0)
			btnPrevious.setEnabled(false);
		else
			btnPrevious.setEnabled(true);
			btnNext.setEnabled(true);
			lblbookid2.setText(counter2+1+".Book ID");
			Display();
	}
	if(ae.getSource()==btnSearch)
	{
		Validate2();
		Search();
	}
}//end Action Performed
public void Reset()
{
	 txtid.setText("");
	 txtid2.setText("");
	 txtname.setText("");
	 txtprice.setText("");
	 //txtusername.setText("");
	 //txtpassword.setText("");
	 txtamountofbook.setText("");
	 txtbookarriveddate.setText("");
	 txttypeofbook.setText("");
 
}//end of rest
 
public void Save()
{
	String name,username,password,id,tob,temp,temp2,temp3,temp4;
	int aob,bad;
	double price;
	//char[] studGrade=new char[5];
 
 
		id=txtid.getText();
		libryRec[counter].setBkid(id);
		name = txtname.getText();
		libryRec[counter].setBknm(name);
		temp2 = txtprice.getText();
		price=Double.parseDouble(temp2);
		libryRec[counter].setPrice(price);
		//username = txtusername.getText();
		//libryRec[counter].setUsername(username);
		//password = txtpassword.getText();
		//libryRec[counter].setPassword(password);
		temp = txtamountofbook.getText();
		aob=Integer.parseInt(temp);
		libryRec[counter].setAmtbk(aob);
		temp4 = txtbookarriveddate.getText();
		bad=Integer.parseInt(temp4);
		libryRec[counter].setArrdate(bad);
		tob = txttypeofbook.getText();
		libryRec[counter].setTypbk(tob);
 
	/*	for(int i=0;i<5;i++)
		{
			studGrade[i] = TempGra[i];
		}
	*/
 
 
}// end of save
 
public void Display()
{
	int temp1;
	String temp2,temp4;
	double temp3;
 
	lblbookid2.setText(libryRec[counter2].getBkid());
	lblbookname2.setText(libryRec[counter2].getBknm());
	temp1=libryRec[counter2].getAmtbk();
	temp2=Integer.toString(temp1);
	lblamountofbook1.setText(temp2);
	lbltypeofbook2.setText(libryRec[counter2].getTypbk());
	temp1=libryRec[counter2].getArrdate();
	temp2=Integer.toString(temp1);
	lblbookarriveddate2.setText (temp2);
	temp3=libryRec[counter2].getPrice();
	temp4=Double.toString(temp1);
	lblprice2.setText(temp2);
}
public void Search()
{
	String str,temp2;
	int count=0,temp1;
	double temp3;
	flag2=true;
	String[] idArray = new String[libryRec.length];
	str=txtid2.getText();
	for(int k=0;k<libryRec.length;k++)
	{
		idArray[k]=libryRec[k].getBkid();
		if(idArray[k].equals(str))
		{
			flag=true;
			lblbookid211.setText(libryRec[k].getBkid());
			lblbookname211.setText(libryRec[k].getBknm());
			temp1=libryRec[k].getAmtbk();
			temp2=Integer.toString(temp1);
			lblamountofbook211.setText(temp2);
			lbltypeofbook211.setText(libryRec[k].getTypbk());
			temp1=libryRec[k].getArrdate();
			temp2=Integer.toString(temp1);
			lblbookarriveddate211.setText(temp2);
			temp3=libryRec[k].getPrice();
			temp2=Double.toString(temp1);
			lblprice211.setText(temp2);
			break;
 
		}
		else if(!(idArray[k].equals(str)))
			flag2=false;
	}
	if(flag2==false)
		JOptionPane.showMessageDialog(this,"Record Not Found");
	}//End of search
 
	public void Validate() throws ArithmeticException
	{
		flag=false;
 
		if(txtid.getText().equals("")||txtname.getText().equals("")||txtprice.getText().equals("")||txtusername.getText().equals("")
			||txtpassword.getText().equals("")||txtamountofbook.getText().equals("")||txtbookarriveddate.getText().equals("")||
			txttypeofbook.getText().equals(""))
		{
			JOptionPane.showMessageDialog(this,"Please Fill In The Blanks:");
		}
		else if(!txtname.getText().matches("([a-zA-Z]+|[a-zA-Z]+\\s[a-zA-Z]+)*"))
		{
			JOptionPane.showMessageDialog(this,"Invalid Name.");
			txtname.requestFocus();
		}
		else if(!txtusername.getText().matches("([a-zA-Z]+|[a-zA-Z]+\\s[a-zA-Z]+)*"))
		{
			JOptionPane.showMessageDialog(this,"Invalid Username.");
			txtusername.requestFocus();
		}
 
 
	}//end fo validate 1
 
	public void Validate2()
	{
		if(txtid2.getText().equals(""))
		{
		JOptionPane.showMessageDialog(this,"Please enter Search ID");
		txtid2.requestFocus();
		}
		else if(txtid2.getText().matches("\\d{8}"))
		{
		JOptionPane.showMessageDialog(this,"Invalid ID Format.");
		txtid2.requestFocus();
		}
	}//Validte 2
 
}

--------------------Configuration: <Default>--------------------
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at libryGUI.Validate(libryGUI.java:521)
at libryGUI.actionPerformed(libryGUI.java:347)
at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed (AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultB uttonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.jav a:6504)
at javax.swing.JComponent.processMouseEvent(JComponen t.java:3321)
at java.awt.Component.processEvent(Component.java:626 9)
at java.awt.Container.processEvent(Container.java:222 9)
at java.awt.Component.dispatchEventImpl(Component.jav a:4860)
at java.awt.Container.dispatchEventImpl(Container.jav a:2287)
at java.awt.Component.dispatchEvent(Component.java:46 86)
at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:4422)
at java.awt.Container.dispatchEventImpl(Container.jav a:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2713 )
at java.awt.Component.dispatchEvent(Component.java:46 86)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.j ava:707)
at java.awt.EventQueue.access$000(EventQueue.java:101 )
at java.awt.EventQueue$3.run(EventQueue.java:666)
at java.awt.EventQueue$3.run(EventQueue.java:664)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:680)
at java.awt.EventQueue$4.run(EventQueue.java:678)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java: 677)
at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:128)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:117)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:105)
at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:90)



sorry i didn't get your question cause i new to java sorry

LOL relay i don't understand sad cause i wore this program with a book reference for my project

temp3=libryRec[k].getPrice();
temp2=Double.toString(temp1);
lblprice211.setText(temp2);

break;

}
else if(!(idArray[k].equals(str)))
-> line 512 flag2=false;
}

lol but bro this is my assignment we did a little on java in my school and i need to submit this code for a presentation on Wednesday
realy i need a help of a good java code programmer
Realy need help hear WEDNESDAy last day

same error bro didn't chg

but i need to insert the value when i run the program?

still trying to fix the NPE
man i am trying that for like the past 5 hours with my reference program but still CANT FIX IT

bro i get this error when i enter all the value and click save

bro i get this error when i enter all the value and click save and i dont have any null vlaue

exect for my tab pane

well i did this project with a reference gaven by my teacher wan a take a look not all same but some are but that can save this cant save sad =(