Thread: the if statement does not work

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.text.DecimalFormat;
import javax.swing.event.*;

public class japanese extends JApplet {

public void init() {

JTextArea outputArea;
outputArea = new JTextArea(2,10);

String output = ("");
JOptionPane.showMessageDialog(null,"uchi or ie ","house",
JOptionPane.INFORMATION_MESSAGE);
String house = JOptionPane.showInputDialog("enter the japanese word for " +
"house");
String h = new String("uchi");
String h1 = new String("ie");
output = ("good");
outputArea.setText(output);
if (house == h || house == h1)
JOptionPane.showMessageDialog(null,outputArea,"hou se",
JOptionPane.INFORMATION_MESSAGE);

else
JOptionPane.showMessageDialog(null,"not good","house",
JOptionPane.INFORMATION_MESSAGE);
}
}

Wrap your code in Code tags, ask a question (no, the title doesn't count). Don't compare Strings with ==.

if((*String*.equalsIgnoreCase(*String variable or String value*))||(*String*.equalsIgnoreCase(*String variable or String value*))){

/*statement*/

}

else{

/*statement*/


}

Originally Posted by PhHein

Wrap your code in Code tags, ask a question (no, the title doesn't count). Don't compare Strings with ==.

thank you, it worked.

Now I am having problems with the actionListener. How do I get it to work so that the volume takes all variables?
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;
import java.awt.Container;

public class rectangularSolid extends JApplet implements ActionListener {

public void init() {

String in = JOptionPane.showInputDialog("1(volume),2(surface area),3(diagonal)");
int input = Integer.parseInt(in);

switch(input) {

case 1:
JLabel prompt;
JLabel prompt2;
JLabel prompt3;
JLabel prompt4;
Container c = getContentPane();
c.setLayout(new FlowLayout());
JTextField insert;
JTextField insert2;
JTextField insert3;
JTextField insert4;
prompt = new JLabel("enter length");
insert = new JTextField(10);
c.add(prompt);
c.add(insert);
prompt2 = new JLabel("enter width");
insert2 = new JTextField(10);
c.add(prompt2);
c.add(insert2);
prompt3 = new JLabel("enter height");
insert3 = new JTextField(10);
c.add(prompt3);
c.add(insert3);
prompt4 = new JLabel("answer is ");
insert4 = new JTextField(10);
c.add(prompt4);
c.add(insert4);
insert4.addActionListener(this);
break;
case 2:
JTextArea outputArea;
outputArea = new JTextArea(2,10);
Container c1 = getContentPane();
c1.add(outputArea);
DecimalFormat twoDigits = new DecimalFormat("0.00");
String sa = JOptionPane.showInputDialog("enter length");
double length2 = Double.parseDouble(sa);
String w2 = JOptionPane.showInputDialog("enter width");
double width2 = Double.parseDouble(w2);
String h2 = JOptionPane.showInputDialog("enter height");
double height2 = Double.parseDouble(h2);
String output = "";
output = (" Surface area = "
+ twoDigits.format(surfaceArea(length2,width2,height 2)));
outputArea.setText(output);
JOptionPane.showMessageDialog(null,outputArea,null ,
JOptionPane.INFORMATION_MESSAGE);
break;}
}
public void actionPerformed(ActionEvent e ) {
double length = Double.parseDouble(e.getActionCommand() );
double width = Double.parseDouble(e.getActionCommand());
double height = Double.parseDouble(e.getActionCommand());
showStatus("Volume is " + volume ( length, width, height ) );
}
public double volume(double length, double width, double height) {
return length * width * height;
}
public double surfaceArea(double length2, double width2, double height2) {
return ( 2 * length2 * width2 + 2 * length2 * height2 + 2 * width2 * height2);

}
}

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