Thread: Help guys. Integer variables post

Hey guys. I need help. Im java newbie and i write small program. I want post my integer variables in the next class. Here a code(I wanna change answer color):
Main class(pagrindine.java):

import java.awt.*;
 
import javax.swing.*;
 
import java.awt.event.*;
 
import javax.swing.event.*;
//Mokinio rinkinukas su skaiciofke kur gali keisti atsakymo spalva, pabandyti sukurti uzrasu knygute.
 
public class pagrindine extends JFrame {
 
	JLabel pasisveikinimas;
	JButton calc, uzrasai;
	JMenuBar menubar;
	JMenu menu;
	JMenuItem item;
 
 
 
	public pagrindine() {
		setLayout(new GridBagLayout());
		GridBagConstraints c = new GridBagConstraints();
 
		pasisveikinimas = new JLabel("Sveiki. Ka naudosite?");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 3;
		c.gridy = 3;
		add(pasisveikinimas, c);
 
		calc = new JButton("Skaiciuotuvas");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 3;
		c.gridy = 4;
		add(calc, c);
 
		uzrasai = new JButton("Uzrasai");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 4;
		c.gridy = 4;
		add(uzrasai, c);
 
		calcs e = new calcs ();
		calc.addActionListener(e);
 
		uzras ee = new uzras ();
		uzrasai.addActionListener(ee);
 
 
	}
 
	public class calcs implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			pagrindines gui = new pagrindines(pagrindine.this);
			gui.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
			gui.setSize(350,200);
			gui.setLocation(300,300);
			gui.setVisible(true);
 
		}
	}
 
	public class uzras implements ActionListener {
 
		public void actionPerformed(ActionEvent ee) {
 
		}
	}
 
 
	public static void main(String[]args) {
		pagrindine gui = new pagrindine();
		gui.setSize(350, 250);
		gui.setVisible(true);
		gui.setTitle("Mokinio Rinkinukas");
		gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
 
}

Next Class(pagrindiness.java):

import java.awt.*;
import java.awt.event.*;
 
import javax.swing.*;
import javax.swing.event.*;
 
 
public class pagrindines extends JDialog  {
	JButton atimtis, pridetis, dalyba, daugyba;
	JLabel atsakymas, nu1, nu2;
	JTextField n1, n2;
	JMenuBar menubar;
	JMenu menu;
	JMenuItem item;
	double nn1, nn2, ats;
	String op;
 
	public pagrindines(JFrame frame) {
		super(frame, "Skaiciuotuvas", true);
 
		setLayout(new GridBagLayout());
		GridBagConstraints c = new GridBagConstraints();
 
		menubar = new JMenuBar();
		setJMenuBar(menubar);
 
		menu = new JMenu("Nustatymai");
		menubar.add(menu);
 
		item = new JMenuItem("Keisti atsakymo spalva");
		menu.add(item);
 
		nu1 = new JLabel("1st: ");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 0;
		c.gridy = 0;
		add(nu1, c);
 
		n1 = new JTextField(10);
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 1;
		c.gridy = 0;
		c.gridwidth = 3;
		add(n1, c);
 
		nu2= new JLabel("2nd: ");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 0;
		c.gridy = 1;
		c.gridwidth = 1;
		add(nu2, c);
 
 
		n2 = new JTextField(10);
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 1;
		c.gridy = 1;
		c.gridwidth = 3;
		add(n2, c);
 
 
		pridetis = new JButton("+");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 0;
		c.gridy = 2;
		c.gridwidth = 1;
		add(pridetis, c);
 
		atimtis = new JButton("-");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 1;
		c.gridy = 2;
		add(atimtis, c);
 
		daugyba = new JButton("*");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 2;
		c.gridy = 2;
		add(daugyba, c);
 
		dalyba = new JButton("/");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 3;
		c.gridy = 2;
		add(dalyba, c);
 
		atsakymas = new JLabel("");
		c.fill = GridBagConstraints.HORIZONTAL;
		c.gridx = 0;
		c.gridy = 4;
		c.gridwidth = 4;
		add(atsakymas, c);
 
 
 
		event e = new event();
		atimtis.addActionListener(e);
		pridetis.addActionListener(e);
		daugyba.addActionListener(e);
		dalyba.addActionListener(e);
 
		keist k = new keist();
		item.addActionListener(k);
 
	}
 
 
	public class keist implements ActionListener {
 
		public void actionPerformed(ActionEvent k) {
 
			slideris gui = new slideris(pagrindines.this);
			gui.setSize(400,200);
			gui.setVisible(true);
			gui.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
 
 
		}
 
	}
 
 
 
 
 
	public class event implements ActionListener {
		public void actionPerformed(ActionEvent e) {
 
			try {
				nn1 = Double.parseDouble(n1.getText());
 
			} catch(NumberFormatException e1) {
 
				atsakymas.setText("Klaida!Turi buti skaicius pirmame langelyje!");
				return;
 
			} try {
				nn2 = Double.parseDouble(n2.getText());
			}catch (NumberFormatException e2) {
				atsakymas.setText("Klaida!Turi buti skaicius antrame langelyje!");
				return;
			}
 
			op = e.getActionCommand();
			if (op.equals("+")) {
				ats = nn1 + nn2;
				atsakymas.setText("Atsakymas yra "+ats);
				atsakymas.setForeground(new Color(r,g,b));
			} else {
			if (op.equals("-")) {
				ats = nn1 - nn2;
				atsakymas.setText("Atsakymas yra "+ats);
				atsakymas.setForeground(new Color(r,g,b));
			} else {
				if (op.equals("*")) {
				ats = nn1 * nn2;
				atsakymas.setText("Atsakymas yra "+ats);
				atsakymas.setForeground(new Color(r,g,b));
				} else {
				if (op.equals("/")) {
				if (nn1 == 0 || nn2 == 0) {
					atsakymas.setText("Dalyboje turi negali buti nuliu!!!");
					atsakymas.setForeground(new Color(r,g,b));
				} else {
					ats = nn1 / nn2;
					atsakymas.setText("Atsakymas yra "+ats);
					atsakymas.setForeground(new Color(r,g,b));
				}
					}
				}
			}
			}
		}
 
	}
}

Next Class(slideris.java):

import java.awt.*;
 
import javax.swing.*;
 
import java.awt.event.*;
 
import javax.swing.event.*;
 
public class slideris extends JDialog {
	JSlider redSlider,greenSlider,blueSlider;
	JLabel redLabel,greenLabel,blueLabel;
	JPanel colorPanel, sliders, labels;
	int r,g,b;
 
	public slideris(pagrindines pagrindines) {
		super(pagrindines, "Spalvu keitiklis", true);
		setLayout(new FlowLayout());
 
		redSlider = new JSlider(JSlider.HORIZONTAL,0,255,0);
		greenSlider = new JSlider(JSlider.HORIZONTAL,0,255,0);
		blueSlider = new JSlider(JSlider.HORIZONTAL,0,255,0);
 
		redLabel = new JLabel("Red = 0");
		greenLabel = new JLabel("Green = 0");
		blueLabel = new JLabel("Blue = 0");
 
		colorPanel = new JPanel();
		colorPanel.setBackground(Color.BLACK);
 
		event e = new event();
		redSlider.addChangeListener(e);
		blueSlider.addChangeListener(e);
		greenSlider.addChangeListener(e);
 
		Container pane = this.getContentPane();
		pane.setLayout(new GridLayout(1,3,3,3));
 
		sliders = new JPanel();
		labels = new JPanel();
 
		pane.add(sliders);
		pane.add(labels);
		pane.add(colorPanel);
 
		sliders.setLayout(new GridLayout(3,1,2,2));
		sliders.add(redSlider);
		sliders.add(blueSlider);
		sliders.add(greenSlider);
 
		labels.setLayout(new GridLayout(3,1,2,2));
		labels.add(blueLabel);
		labels.add(greenLabel);
		labels.add(redLabel);
 
}
 
 
	public class event implements ChangeListener {
		public void stateChanged(ChangeEvent e) {
			r = redSlider.getValue();
			g = greenSlider.getValue();
			b = blueSlider.getValue();
 
 
			colorPanel.setBackground(new Color(r,g,b));
 
		}
 
	}
 
 
 
 
}

So, guys, i want post variables r,g,b from class slideris.java in the pagrindiness.java. So you can help me?
Sorry for bad english language ;D Im from Lithuanian, so....

Welcome to the forum! Thanks for taking the time to learn to post code correctly.

What you describe is typically done by passing the variables to the desired instance of the class, either through the constructor or by using a "setter" or mutator method. For the setter method approach, something like:

in slideris.java, the following statement could be used to pass the variables to the instance pagrindiness:

pagrindiness.setVariables( r, g, b );

I dont understeand. Can you write this thing in code ? Thanks...

Hope this helps. I demonstrated both approaches. Let me know if you have questions.

// a class with a main() method to start
// a simple class that sends values to another class via the
// other class' constructor and using a setter method in the other class
public class SendClass
{
    // instance variables
    int rValue;
    int gValue;
    int bValue;
    ReceiveClass receiveClass;
 
    // default constructor
    public SendClass()
    {
        rValue = 5;
        gValue = 15;
        bValue = 25;
 
        // create an instance of ReceiveClass and pass the values
        // through the constructor
        receiveClass = new ReceiveClass( rValue, gValue, bValue );
 
        // output the values
        receiveClass.printRGBValues();
 
        // or, alternatively send the values to the receiveClass
        // instance using the setter method
        receiveClass.setRGBValues( rValue + 5, gValue + 5, bValue + 5 );
 
        // output the values
        receiveClass.printRGBValues();
 
    } // end default constructor
 
    // a main() method
    public static void main( String[] args )
    {
        new SendClass();
 
    } // end method main()
 
} // end class SendClass
 
// a class to receive the values
class ReceiveClass
{
    // instance variables
    int rValue;
    int gValue;
    int bValue;
 
    // a constructor that accepts the 3 values
    public ReceiveClass( int rValue, int gValue, int bValue )
    {
        this.rValue = rValue;
        this.gValue = gValue;
        this.bValue = bValue;
 
    } // end constructor
 
 
    // a method to set the values
    public void setRGBValues( int rValue, int gValue, int bValue )
    {
        this.rValue = rValue;
        this.gValue = gValue;
        this.bValue = bValue;
 
    } // end method setRGBValues()
 
    // to output the values
    public void printRGBValues()
    {
        System.out.println( "The values are: " );
        System.out.println( "rValue: " + rValue );
        System.out.println( "gValue: " + gValue );
        System.out.println( "bValue: " + bValue );
 
    } // end method printRGBValues()
 
} // end class ReceiveClass

Very thank You. I analized this code. But maybe you can show this thing inputed in my code?

No, I won't modify your code. You try it and post the changes with any errors if you need help fixing any problems you're having.

Okey. Thanks for help