Java SWING JFrame BorderLayout

import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
public class BorderLayoutExample1 {

BorderLayoutExample1(){
JFrame frame = new JFrame("Border Layout");
JButton button,button1, button2, button3,button4;
button = new JButton("left");
button1 = new JButton("right");
button2 = new JButton("top");
button3 = new JButton("bottom");
button4 = new JButton("center");
frame.add(button,BorderLayout.WEST);
frame.add(button1, BorderLayout.EAST);
frame.add(button2, BorderLayout.NORTH);
frame.add(button3, BorderLayout.SOUTH);
frame.add(button4, BorderLayout.CENTER);

frame.setSize(300,300);  
frame.setVisible(true);  
}
public  static void main(String[] args){
new BorderLayoutExample1();
}
}

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