NoSuchMethodError!!!

[divya sharma]

Hello once again,

I am running this code while compilling no error displayed but while running it .. message displayed "error thread NoSuchMethodError"

Code is:

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

class MyDrawPanel extends JPanel
{
public void paintComponent(Graphics g)
{
g.setColor(Color.orange);
g.fillRect(20,50,100,100);
}
}

[satishkumar janakiraman]

Hi,

Its because the main method is missing

bye for now
sat

[Rahul Bhattacharjee]

Originally posted by divya sharma:
Hello once again,

I am running this code while compilling no error displayed but while running it .. message displayed "error thread NoSuchMethodError"

Code is:

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

class MyDrawPanel extends JPanel
{
public void paintComponent(Graphics g)
{
g.setColor(Color.orange);
g.fillRect(20,50,100,100);
}
}

classes used during compilation might be different from that used in runtime .So method might not be there.

[divya sharma]

So what's a solution for this ??

[Ernest Friedman-Hill]

Originally posted by divya sharma:
So what's a solution for this ??

If your application consists of just this one class, then the problem is, as the first response states, that you don't have a "public static void main(String[] args)" method. Without one, you don't have an application, merely a class.

To use this one class, you need a minimal main() method. It would have to create a JFrame, put your JPanel into it, set the size of the JFrame and call setVisible(true) on the JFrame to make it appear on the screen. Something like

public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MyDrawPanel());
    frame.setSize(150, 150);
    frame.setVisible(true);
}