hhj - プログラム倉庫

import java.awt.*;
import java.awt.event.*;

class pro extends Frame {
int a;
public static void main(String[] args) {
pro frame =new pro();
}

public pro() {  
setSize(500, 500);
setLayout(new FlowLayout());
Button bu1 = new Button("migi");
bu1.addActionListener(new beckn());
add(bu1);
bu1.setActionCommand("a1");

Button bu2 = new Button("hidari");
bu2.addActionListener(new beckn());
add(bu2);
bu2.setActionCommand("a2");
setVisible(true);
addWindowListener(new stopwin());
a=0;
}


class stopwin extends WindowAdapter{
public void windowClosing(WindowEvent we){System.exit(0);}
}

class beckn implements ActionListener {
public void actionPerformed(ActionEvent e) {
if ("a1".equals(e.getActionCommand()))a=a+2 ;
if ("a2".equals(e.getActionCommand()))a=a+1;
System.out.println(a);
}
}

}