如何在按好按鈕後打開新窗口？

Question

我有一個代碼，打開一個JOptionPane對話框，一旦用戶點擊一個按鈕。我想要做的第一件事是當用戶點擊其中一個按鈕時關閉第一個JFrame。我試過這樣做

setVisible(false); // Delete visibility 
     dispose(); //Delete window 

但是原來的JFrame只要按下一個按鈕就不會關閉。目標是有兩個按鈕。當按下時，顯示一個JOptionPane框，而同時關閉第一個JFrame窗口。我該怎麼做？接下來，在新的JOptionPane中插入ok之後，我不會激發什麼是動作偵聽器。我通過調用方法

sinceyoupressedthecoolbutton(); 

在我的JOptionPane聲明後。這是第二個問題開始的地方，它顯示的JOptionPane完美，但不走的方法

sinceyoupressedthecoolbutton(); 

我不知道問題出在方法調用或方法的內容。基本上，在JOptionPane上按下ok後，我不想移動到另一個打開新JLabel的方法。

下面是代碼：

package Buttons; 

import java.awt.Dimension; 
import java.awt.FlowLayout; //layout proper 
import java.awt.event.ActionListener; //Waits for users action 
import java.awt.event.ActionEvent; //Users action 
import javax.swing.JFrame; //Window 
import javax.swing.JLabel; 
import javax.swing.JButton; //BUTTON!!! 
import javax.swing.JDialog; 
import javax.swing.Icon; 
import javax.swing.ImageIcon; 
import javax.swing.JOptionPane; //Standard dialogue box 

public class ButtonClass extends JFrame { 

private JButton regular; 
private JButton custom; 

public ButtonClass() { // Constructor 
    super("The title"); // Title 
    setLayout(new FlowLayout()); // Default layout 

    regular = new JButton("Regular Button"); 
    add(regular); 


    custom = new JButton("Custom", b); 

    add(custom); 

    Handlerclass handler = new Handlerclass(); 
    Otherhandlerclass original = new Otherhandlerclass(); 
    regular.addActionListener(handler); 
    custom.addActionListener(original); 

    //THIS WAS MY FIRST PROBLEM, I WANT TO CLOSE THE FIRST JFRAME WINDOW AS THE USER HITS OK 
    setVisible(false); // Close the show message dialog box 
    dispose(); 

} 

public class Handlerclass implements ActionListener { // This class is 
                 // inside the other 
                 // class 

    public void actionPerformed(ActionEvent eventvar) { // This will happen 
                 // when button is 
                 // clicked 
     JOptionPane.showMessageDialog(null, String.format("%s", eventvar.getActionCommand())); //opens a new window with the name of the button 
    } 
} 

public class Otherhandlerclass implements ActionListener { 

    public void actionPerformed(ActionEvent e) { 

     JOptionPane.showMessageDialog(null,"Since you pressed that button, I will open a new window when you press ok, okay?"); 

     //Code works up until here 

     sinceyoupressedthecoolbutton(); //THIS METHOD SHOULD OPEN A NEW WINDOW! 
    } 

    public void sinceyoupressedthecoolbutton() { 

     JDialog YES = new JDialog(); 
     JLabel label = new JLabel("Here is that new window I promised you!"); 
     add(label); 
     YES.setDefaultCloseOperation(JDialog.EXIT_ON_CLOSE); 
     YES.setSize(500, 500); 
     YES.setVisible(true); 

    } 

    public class okay implements ActionListener { 
     public void actionPerformed(ActionEvent ok) { 

     } 

    } 

} 

}

幫助將不勝感激！

Answer 1

您正在使用事件驅動環境，而不是線性處理環境。這意味着你運行一些代碼，然後等待（等待完成了你）發生某些事件，然後你對它做出響應...

直到用戶按下按鈕custom，沒有什麼可以發生，所以它沒有意義試圖在此之前關閉框架

當您的Otherhandlerclass的actionPerformed被觸發時，顯然您會顯示JOptionPane窗格，這將阻止執行流程直到它關閉。此時，您應該有機會處理原始窗口。的

所以不是調用構造函數setVisible(false)和dispose，倒不如把它移動到Otherhandlerclass

public class Otherhandlerclass implements ActionListener { 

    public void actionPerformed(ActionEvent e) { 

     dispose(); 
     JOptionPane.showMessageDialog(null, "Since you pressed that button, I will open a new window when you press ok, okay?"); 

     sinceyoupressedthecoolbutton(); 
    } 

    public void sinceyoupressedthecoolbutton() { 

     JDialog YES = new JDialog(); 
     JLabel label = new JLabel("Here is that new window I promised you!"); 
     YES.add(label); 
     YES.setSize(500, 500); 
     YES.setVisible(true); 

    } 

    public class okay implements ActionListener { 

     public void actionPerformed(ActionEvent ok) { 

     } 

    } 

} 

話雖如此，我會鼓勵你有The Use of Multiple JFrames, Good/Bad Practice?讀，也許可以考慮使用像How to Use CardLayout而不是