Kleines Beispiel zum Thema Quellen Angabe bei Javas ActionListener für eine Studentin.

Java.java

package Test;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Java extends Frame{


    public static void main(String[] args) {
        Java java = new Java();
    }

    public Java(){
        for(int i = 0; i < 10; i++) {
            for(int j = 0; j < 10; j++) {
                Button button = new Button(i + ":" + j);
                button.setBounds(25*i,25*i,20,20);
                button.addActionListener(new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent actionEvent) {
                        ((Button)actionEvent.getSource()).setEnabled(false);
                    }
                });
                this.add(button);
            }

        }
        this.setLayout(new FlowLayout());
        this.setBounds(500,500,500,500);
        this.validate();
        this.setVisible(true);
    }
}