2幀內的Jpanels。左面板是帶按鈕的菜單。使用按鈕切換右側面板。

我想寫一個程序，在任何時候都有2個面板。左面板將是一個帶按鈕的菜單，而右面板將根據面板中按下的按鈕而改變。2幀內的Jpanels。左面板是帶按鈕的菜單。使用按鈕切換右側面板。

現在我被卡住了。當點擊「recipeRolodexButton」時沒有任何事情發生。我想要發生的是，右側面板要麼被移除並替換爲我的面板方法，要麼被另一個面板覆蓋。

public class Window extends JFrame implements ActionListener{ 


private static final long serialVersionUID = 1L; 


//Buttons 
     JButton recipeRolodexButton = new JButton("Recipe Rolodex"); 
     JButton groceryFinanceButton = new JButton("Grocery Finance"); 
     JButton testButton1 = new JButton("Test Button"); 

     JPanel homeLeftPanel = new JPanel(); 

     JPanel homeRightPanel = new JPanel(); 
     RolodexOptionsPane rop = new RolodexOptionsPane(); 

    public static void main(String[] args){ 
    new Window(); 
    } 

    public Window(){ 

    //declarations 
    Toolkit tk = Toolkit.getDefaultToolkit(); 
    Dimension dim = new Dimension();   
    dim = tk.getScreenSize(); 
    GridBagConstraints gbcl = new GridBagConstraints(); 



    //setting up the window 
    this.setVisible(true); 
    this.setSize(550,300); 
    this.setDefaultCloseOperation(EXIT_ON_CLOSE); 
    this.setTitle("Food Management");  
    int xPosition = ((dim.width/2) - this.getWidth()/2); 
    int yPosition = ((dim.height/2) - (this.getHeight()/2)); 
    this.setLocation(xPosition, yPosition); 
    this.setLayout(new GridBagLayout()); 
    this.setResizable(false); 

     //Add Action Listeners 
     recipeRolodexButton.addActionListener(this);; 
     groceryFinanceButton.addActionListener(this); 
     testButton1.addActionListener(this); 

     //Setting up Main Panels 
     homeLeftPanel.setBackground(Color.BLUE); 
     homeLeftPanel.setLayout(new GridBagLayout()); 
     homeRightPanel.setBackground(Color.BLACK); 
     homeRightPanel.setLayout(new GridBagLayout()); 

    // setting the Button constraints in the main Left Panel buttons 
    gbcl.anchor = GridBagConstraints.CENTER; 
    gbcl.fill = GridBagConstraints.HORIZONTAL; 
    gbcl.gridy = 0; 
    gbcl.gridx = 0;    
    gbcl.ipady = 4; 
    gbcl.insets = new Insets(15,0,0,0); 
    homeLeftPanel.add(recipeRolodexButton,gbcl);     
    gbcl.gridy = 1; 
    homeLeftPanel.add(groceryFinanceButton, gbcl);    
    gbcl.gridy = 2; 
    homeLeftPanel.add(testButton1, gbcl); 

    // setting up the buttons in the main right panel 



    // EXECUTION!!!!!!!!!!!! 
    PanelSet(homeLeftPanel,homeRightPanel);  

} 

public void PanelSet(JPanel left , JPanel right){ 

    GridBagConstraints gbcLeft = new GridBagConstraints(); 
    GridBagConstraints gbcRight = new GridBagConstraints(); 

    //positioning the panels   
      gbcLeft.fill = GridBagConstraints.BOTH; 
      gbcLeft.gridx = 0; 
      gbcLeft.gridy = 0; 
      gbcLeft.weightx = .15; 
      gbcLeft.weighty = .5;    

      gbcRight.fill = GridBagConstraints.BOTH; 
      gbcRight.gridx = 1; 
      gbcRight.gridy = 0; 
      gbcRight.weightx = .85; 


this.add(left,gbcLeft); 
this.add(right,gbcRight); 
} 


public void actionPerformed(ActionEvent e) { 
    if(e.getSource() == recipeRolodexButton){ 
     PanelSet(recipeRolladexButton,rop); 

    } 

} 



}

對於間距抱歉。當複製我的代碼時，縮進失去了。

來源

2015-07-05 Kyle Keberlein

'當複製我的代碼時，縮進丟失了。 - 修復您的代碼。請使用所有空格或全部選項卡，但不要混合使用這兩個選項卡。另外方法名稱不應以大寫字符開頭。不要稱你爲課堂「窗口」。這個名稱有一個AWT類可能導致混淆。選擇一個更具描述性的名字。 – camickr

而右側面板將根據在任一面板中按下的按鈕而改變。

您應該使用右側面板的Card Layout。然後當你點擊一個按鈕時，你只需指定要顯示的面板的名稱，剩下的就是CardLayout。

本教程有一個工作示例，演示如何在從組合框中選擇項目時交換面板。

來源

2015-07-05 23:01:40 camickr

2幀內的Jpanels。左面板是帶按鈕的菜單。使用按鈕切換右側面板。

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