0112おれさま ◆6CTEZS59O00a
2018/10/06(土) 09:30:34.08最終的な処理がより複雑になりコードが長くなった場合
わかりにくいコードになってしまう点は否定できないのだが
public class Main extends JFrame {
JPopupMenu pm = new JPopupMenu(); //C
Main() {
setSize(100, 100);
setLocationRelativeTo(null);
addMouseListener( //@
new MouseListener() { //A+B
public void mouseClicked(MouseEvent e) {
if(SwingUtilities.isRightMouseButton(e)) {
pm.show(e.getComponent(), e.getX(), e.getY());
}
}
public void mousePressed(MouseEvent e) {}
public void mouseReleased(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
}
);
JMenuItem mi = new JMenuItem("閉じる"); //E
mi.addActionListener( //F
new ActionListener() { //G+H
public void actionPerformed(ActionEvent e) {
System.exit(0);
}});
pm.add(mi); //D
JMenuItem mi2 = new JMenuItem("サイズを大きくする"); //E
mi2.addActionListener( //F
new ActionListener() { //G+H
public void actionPerformed(ActionEvent e) {
setSize(300, 300);
}});
pm.add(mi2); //D
}
public static void main(String[] args) {
Main ma = new Main();
ma.setVisible(true);
}
}