public class TestClass{

    public static void main(String[] args) {
        new TestClass().foo();
    }

    public void foo() {

        class MyActionListener implements ActionListener {

            private int value;

            public MyActionListener(int value){
                this.value = value;
            }
            @Override
            public void actionPerformed(ActionEvent arg0) {
                System.out.println("You pressed on button " + value + "!");
            }
        }

        JFrame frame = new JFrame();
        JPanel panel = new JPanel();

        for(int i = 0; i < 10; i++){
            JButton button = new JButton("Button " + i);
            button.addActionListener(new MyActionListener(i));
            panel.add(button);
        }


        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.add(panel);

        frame.pack();
        frame.setVisible(true);
    }
}