import java.awt.Color;
import javax.swing.*;class Frame extends JFrame {public Frame(){
this.setBackground(Color.red);
this.setLayout(null);
this.setSize(300,300);
this.setVisible(true);
}
public static void main(String[] args){
new Frame();
}
}
import javax.swing.*;class Frame extends JFrame {public Frame(){
this.setBackground(Color.red);
this.setLayout(null);
this.setSize(300,300);
this.setVisible(true);
}
public static void main(String[] args){
new Frame();
}
}
import javax.swing.*; public class Replace extends JFrame { public Replace(){
super("Change Color");
getContentPane().setBackground(Color.red); setSize(300,300);
setVisible(true);
}
public static void main(String[] args){
new Replace();
}
}