JOptionPane.showConfirmDialog例…

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

public class jjfrom extends JFrame {

 

private static final long serialVersionUID = 1L;

public jjfrom() {

   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    getContentPane().add(newJLabel("Placeholder label"));

    pack();

    setSize(200, 200);

    setVisible(true);

    int replaced =JOptionPane.showConfirmDialog(this,

       "Replace existing selection?");

    String result ="?";

    switch (replaced){

    caseJOptionPane.CANCEL_OPTION:

     result = "Canceled";

     break;

    caseJOptionPane.CLOSED_OPTION:

     result = "Closed";

     break;

    caseJOptionPane.NO_OPTION:

     result = "No";

     break;

    caseJOptionPane.YES_OPTION:

     result = "Yes";

     break;

    default:

     ;

    }

   System.out.println("Replace? " + result);

  }

  public static void main(String[] args){

    new jjfrom();

  }

}