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jbutton Click Event example Advance Java

Jbutton Click Event example Advance Java 

Change frame Color On Button click Advance Java 






import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
    
class FrameDemo extends JFrame implements ActionListener
{
     
JButton btn;

Container c;
        
FrameDemo()
{              
c=this.getContentPane();
       JButton btn= new JButton("Click");
btn.setBounds(100,50,100,50);
        c.add(btn);
        c.setLayout(null);
       btn.addActionListener(this);
}
                  
public void actionPerformed(ActionEvent a)
                  
c.setBackground(Color.RED);
}
}
       // creating a class ActionDemo (step 2 )
class ActionDemo
{
public static void main( String args[])
{
                // Creating object of FrameDemo class ( Step 5 )
FrameDemo f=new FrameDemo();
f.setTitle("click Event ");
f.setVisible(true);
f.setBounds(100,50,700,500);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

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