Java-erotima-1

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

public class erotima1 {


//main sinartisi , to programma arxizei apo edo
public static void main(String[] args) {
    //arxikopoihsh parathirou
    Frame f=new Frame("Ερώτημα 1");
    //arxikopoihsh koubiou
    Button b=new JButton("Click Here");
    //otan patithei tha ginei kokkino to border
    b.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
            b.setBorder(new LineBorder(Color.RED));
        }
    });
    //prosthiki koubiou sto parathiro
    f.add(b);
    //orismos megethos tou parathirou
    f.setSize(400,400);
    //min dineis simasia
    f.setLayout(null);
    //kanei to parathiro na emfanizete
    f.setVisible(true);
}

}