如何在 Java 中让 JOptionPane 处理“是”、“否”和“关闭”按钮？

为此，创建 JOptionPane.QUESTION_MESSAGE 并在用户操作时显示某一个消息，例如 –

int res = JOptionPane.showOptionDialog(new JFrame(), "Do you like Cricket?", "Hobbies",
JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null,
new Object[] { "Yes", "No" }, JOptionPane.YES_OPTION);
if (res == JOptionPane.YES_OPTION) {
   System.out.println("Selected Yes!");
}

上面，我们在控制台中显示了一条消息，如果用户选择“是”按钮。以下是一个示例，让 JOptionPane 处理“是”、“否”和“关闭”按钮 –

示例

package my;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
public class SwingDemo {
   public static void main(String args[]) {
      int res = JOptionPane.showOptionDialog(new JFrame(), "Do you like Cricket?","Hobbies",
         JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null,
         new Object[] { "Yes", "No" }, JOptionPane.YES_OPTION);
      if (res == JOptionPane.YES_OPTION) {
         System.out.println("Selected Yes!");
      } else if (res == JOptionPane.NO_OPTION) {
         System.out.println("Selected No!");
      } else if (res == JOptionPane.CLOSED_OPTION) {
         System.out.println("Window closed without selecting!");
      }
   }
}