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

public class MainFond {
	public static void main(String[] args) {
		JFrame frame = new JFrame("Fond");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


		Fond panel = new Fond(); 

		frame.add(panel, BorderLayout.CENTER);
		frame.setSize(500,500);
		frame.setLocation(500,250);
    	frame.setVisible(true);
	}
}

[srivasta@vm-srivasta 1.Fond]$ javac MainFond.java 
./Fond.java:27: error: cannot find symbol
	public void actionPerformed(ActionEvent evenement) {
	                            ^
  symbol:   class ActionEvent
  location: class Fond
MainFond.java:12: error: no suitable method found for add(Fond,String)
		frame.add(panel, BorderLayout.CENTER);
		     ^
    method Container.add(String,Component) is not applicable
      (argument mismatch; Fond cannot be converted to String)
    method Container.add(Component,int) is not applicable
      (argument mismatch; Fond cannot be converted to Component)
    method Container.add(Component,Object) is not applicable
      (argument mismatch; Fond cannot be converted to Component)
./Fond.java:8: error: cannot find symbol
		this.setLayout(null);
		    ^
  symbol: method setLayout(<null>)
./Fond.java:17: error: incompatible types: Fond cannot be converted to ActionListener
		this.Cyan.addActionListener(this);
		                            ^
./Fond.java:18: error: incompatible types: Fond cannot be converted to ActionListener
		this.Magenta.addActionListener(this);
		                               ^
./Fond.java:19: error: incompatible types: Fond cannot be converted to ActionListener
		this.Jaune.addActionListener(this);
		                             ^
./Fond.java:21: error: cannot find symbol
		frame.add(this.Cyan);
		^
  symbol:   variable frame
  location: class Fond
./Fond.java:22: error: cannot find symbol
		frame.add(this.Magenta);
		^
  symbol:   variable frame
  location: class Fond
./Fond.java:23: error: cannot find symbol
		frame.add(this.Jaune);
		^
  symbol:   variable frame
  location: class Fond
./Fond.java:26: error: method does not override or implement a method from a supertype
	@Override
	^
./Fond.java:29: error: cannot find symbol
			frame.setBackground(Color.CYAN);
			^
  symbol:   variable frame
  location: class Fond
./Fond.java:31: error: cannot find symbol
			frame.setBackground(Color.MAGENTA);
			^
  symbol:   variable frame
  location: class Fond
./Fond.java:33: error: cannot find symbol
			frame.setBackground(Color.JAUNE);
			                         ^
  symbol:   variable JAUNE
  location: class Color
./Fond.java:33: error: cannot find symbol
			frame.setBackground(Color.JAUNE);
			^
  symbol:   variable frame
  location: class Fond
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
14 errors