如何使用JButton关闭一个JDialog窗口？

Question

我试过了一堆不同的方法来关闭窗口，但由于您无法将其他参数发送到Action Listener方法，所以我无法处理该帧，因为该帧的指针异常。

这是我现在的代码。

import java.awt.FlowLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 

import javax.swing.*; 

public class errorRequiredFieldMissing extends JDialog{ 
JLabel error; 
JButton exit; 
public static JFrame frame; 
public errorRequiredFieldMissing() { 
    super(frame, "Error", true); 
    setLayout(new FlowLayout()); 
    error = new JLabel ("Required field or fields missing, please fill in all fields to continue."); 
    add(error); 
    exit = new JButton ("OK"); 
    add(exit); 
    System.out.println("chk1"); 
    exit.addActionListener(new ActionListener(){ 

     public void actionPerformed(ActionEvent event){ 
      System.out.println("chk2"); 
      frame.dispose(); 
     } 
    }); 
} 
public static void method2(){ 
    System.out.print("success!"); 
    errorRequiredFieldMissing gui = new errorRequiredFieldMissing(); 
    gui.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE); 
    gui.setSize(400,100); 
    gui.setLocation(300,25); 
    gui.setVisible(true); 
} 
} 

Answer 1

试试这个方法：

exit.addActionListener(new java.awt.event.ActionListener() { 
    public void actionPerformed(java.awt.event.ActionEvent evt) { 
     exitActionPerformed(evt); 
    } 
}); 

然后

private void exitActionPerformed(java.awt.event.ActionEvent evt) { 
     this.dispose(); 
    }