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error in code (cannot resolve symbol-method getContentPane()

Posted on 2004-03-28
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Last Modified: 2010-03-31
Get this error in code (cannot resolve symbol-method getContentPane()

this.getContentPane().add(p1, BorderLayout.CENTER);

 I made it easy to fine it has all the space between it and other code


import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Kempos extends JPanel
{ // Opens class

    public Kempos()
    {
        super();

        Font f1 = new Font("Courier New", Font.BOLD, 15);

        JPanel p1 = new JPanel();
        JPanel p2 = new JPanel();
        JPanel p3 = new JPanel();
        JPanel p4 = new JPanel();
        JPanel p5 = new JPanel();
        JPanel p6 = new JPanel();

        final JButton b1 = new JButton("G1");
        final JButton b2 = new JButton("G2");
        final JButton b3 = new JButton("G3");
        final JButton b4 = new JButton("G4");
        final JButton b5 = new JButton("G5");
        final JButton b6 = new JButton("G6");
        final JButton b7 = new JButton("G7");
        final JButton b8 = new JButton("G8");

        final JButton b9 = new JButton("Restart");
        final JButton b0 = new JButton("   Exit    ");

        b9.setMnemonic('R'); b0.setMnemonic('E');

        final JLabel l1 = new JLabel();
        l1.setBorder(BorderFactory.createLineBorder(Color.yellow));

        p1.setBorder(BorderFactory.createLoweredBevelBorder());
        p4.setBorder(BorderFactory.createLoweredBevelBorder());
        p4.setBackground(Color.blue);

        p1.setLayout(new GridLayout(1,2));
        p1.add(p2); p1.add(p3);

        p2.setLayout(new GridLayout(1,1));
        p2.add(p4);

        p4.setLayout(new GridLayout(3,3));
        p4.add(b1); p4.add(b2); p4.add(b3);
        p4.add(b4); p4.add(l1); p4.add(b5);
        p4.add(b6); p4.add(b7); p4.add(b8);

        p5.setLayout(new GridLayout(5,1));
        p5.add(new JLabel("Name 1\n"));
        p5.add(new JLabel("Name 2"));
        p5.add(new JLabel("Name 3"));
        p5.add(new JLabel("Name 4"));
        p5.add(new JLabel("Name 5"));
 
        p3.setLayout(new GridLayout(1,3));
        p3.add(new JPanel()); p3.add(p5);
        p3.add(new JPanel());

        p6.add(b9); p6.add(b0);




        this.getRootPane().setDefaultButton(b9);
        this.getContentPane().add(p1, BorderLayout.CENTER);
        this.getContentPane().add(p6, BorderLayout.SOUTH);






        this.setResizable(false);
        this.setSize(800, 600);
        this.setVisible(true);

        // Add your action listener here . . .
        b1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G1       ");
        b1.setText("");
        b1.setEnabled(false);
        }
        });

        b2.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G2       ");
        b2.setText("");
        b2.setEnabled(false);
        }
        });

        b3.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G3       ");
        b3.setText("");
        b3.setEnabled(false);
        }
        });

        b4.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G4       ");
        b4.setText("");
        b4.setEnabled(false);
        }
        });

        b5.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G5       ");
        b5.setText("");
        b5.setEnabled(false);
        }
        });

        b6.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G6       ");
        b6.setText("");
        b6.setEnabled(false);
        }
        });

        b7.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G7       ");
        b7.setText("");
        b7.setEnabled(false);
        }
        });

        b8.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G8       ");
        b8.setText("");
        b8.setEnabled(false);
        }
        });

        b9.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("");

        b1.setText("G1");
        b2.setText("G2");
        b3.setText("G3");
        b4.setText("G4");
        b5.setText("G5");
        b6.setText("G6");
        b7.setText("G7");
        b8.setText("G8");

        b1.setEnabled(true);
        b2.setEnabled(true);
        b3.setEnabled(true);
        b4.setEnabled(true);
        b5.setEnabled(true);
        b6.setEnabled(true);
        b7.setEnabled(true);
        b8.setEnabled(true);
        }
        });

        b0.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        System.exit(0);
        }
        });
    }
}
0
Comment
Question by:Drop_of_Rain
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6 Comments
 
LVL 15

Expert Comment

by:Javatm
ID: 10701555
This should be just basic try to read the documentation of Java :

Baically, this is the problem, because this declared for JFrame :

this.getRootPane().setDefaultButton(b9);
this.getContentPane().add(p1, BorderLayout.CENTER);
this.getContentPane().add(p6, BorderLayout.SOUTH);
this.setResizable(false);
this.setSize(800, 600);
this.setVisible(true);

So remove that and replace that with :

getRootPane().setDefaultButton(b9);
add(p1, BorderLayout.CENTER);
add(p6, BorderLayout.SOUTH);

Hope that helps . . .
Javatm
0
 
LVL 9

Expert Comment

by:mmuruganandam
ID: 10701560
Kempos extends JFrame

Will solve your problem.


Regards,
Muruga
0
 
LVL 15

Expert Comment

by:Javatm
ID: 10701613
> Kempos extends JFrame
> Will solve your problem.

Essentially (s)he Told me to create it to JPanel because what we originally have was
JFrame, so basically she needs it to be in JPanel.

Hope that helps . . .
Javatm
0
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LVL 15

Accepted Solution

by:
Javatm earned 700 total points
ID: 10701619
So it will be like this :

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Kempos extends JPanel
{ // Opens class

    public Kempos()
    {
        super();

        Font f1 = new Font("Courier New", Font.BOLD, 15);

        JPanel p1 = new JPanel();
        JPanel p2 = new JPanel();
        JPanel p3 = new JPanel();
        JPanel p4 = new JPanel();
        JPanel p5 = new JPanel();
        JPanel p6 = new JPanel();

        final JButton b1 = new JButton("G1");
        final JButton b2 = new JButton("G2");
        final JButton b3 = new JButton("G3");
        final JButton b4 = new JButton("G4");
        final JButton b5 = new JButton("G5");
        final JButton b6 = new JButton("G6");
        final JButton b7 = new JButton("G7");
        final JButton b8 = new JButton("G8");

        final JButton b9 = new JButton("Restart");
        final JButton b0 = new JButton("   Exit    ");

        b9.setMnemonic('R'); b0.setMnemonic('E');

        final JLabel l1 = new JLabel();
        l1.setBorder(BorderFactory.createLineBorder(Color.yellow));

        p1.setBorder(BorderFactory.createLoweredBevelBorder());
        p4.setBorder(BorderFactory.createLoweredBevelBorder());
        p4.setBackground(Color.blue);

        p1.setLayout(new GridLayout(1,2));
        p1.add(p2); p1.add(p3);

        p2.setLayout(new GridLayout(1,1));
        p2.add(p4);

        p4.setLayout(new GridLayout(3,3));
        p4.add(b1); p4.add(b2); p4.add(b3);
        p4.add(b4); p4.add(l1); p4.add(b5);
        p4.add(b6); p4.add(b7); p4.add(b8);

        p5.setLayout(new GridLayout(5,1));
        p5.add(new JLabel("Name 1\n"));
        p5.add(new JLabel("Name 2"));
        p5.add(new JLabel("Name 3"));
        p5.add(new JLabel("Name 4"));
        p5.add(new JLabel("Name 5"));
 
        p3.setLayout(new GridLayout(1,3));
        p3.add(new JPanel()); p3.add(p5);
        p3.add(new JPanel());

        p6.add(b9); p6.add(b0);

        getRootPane().setDefaultButton(b9);
        add(p1, BorderLayout.CENTER);
        add(p6, BorderLayout.SOUTH);

        // Add your action listener here . . .
        b1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G1       ");
        b1.setText("");
        b1.setEnabled(false);
        }
        });

        b2.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G2       ");
        b2.setText("");
        b2.setEnabled(false);
        }
        });

        b3.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G3       ");
        b3.setText("");
        b3.setEnabled(false);
        }
        });

        b4.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G4       ");
        b4.setText("");
        b4.setEnabled(false);
        }
        });

        b5.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G5       ");
        b5.setText("");
        b5.setEnabled(false);
        }
        });

        b6.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G6       ");
        b6.setText("");
        b6.setEnabled(false);
        }
        });

        b7.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G7       ");
        b7.setText("");
        b7.setEnabled(false);
        }
        });

        b8.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("       G8       ");
        b8.setText("");
        b8.setEnabled(false);
        }
        });

        b9.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        l1.setText("");

        b1.setText("G1");
        b2.setText("G2");
        b3.setText("G3");
        b4.setText("G4");
        b5.setText("G5");
        b6.setText("G6");
        b7.setText("G7");
        b8.setText("G8");

        b1.setEnabled(true);
        b2.setEnabled(true);
        b3.setEnabled(true);
        b4.setEnabled(true);
        b5.setEnabled(true);
        b6.setEnabled(true);
        b7.setEnabled(true);
        b8.setEnabled(true);
        }
        });

        b0.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent h)
        {
        System.exit(0);
        }
        });
    }
}
0
 

Author Comment

by:Drop_of_Rain
ID: 10701666
Yes it was basic but it was right under my nose. So was this but when you brought it to my attention I noticed it. Thanks fot the eye opener. Duh so I didn't need the last comment you made.

Thanks for all the help.

        this.setResizable(false);
        this.setSize(800, 600);
        this.setVisible(true);
0
 
LVL 15

Expert Comment

by:Javatm
ID: 10701741
http://www.freewebs.com/cube-j

Always glad to help . . .
Friend : Javatm
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