在JPanel中以特定方式定位按钮

我试图以特定方式定位六个按钮，但目前输出几乎是正确的，但按钮并不是我希望它们处于的确切位置（与所有按钮触摸相邻的按钮，无间隙）。这是显示如下：在JPanel中以特定方式定位按钮

button pic

有人能看看我的代码，看看为什么定位不准确？

public void createDirectionButtonPanel() { 

    JButton northButton = new JButton("north"); 
    JButton southButton = new JButton("south"); 
    JButton westButton = new JButton("west"); 
    JButton eastButton = new JButton("east"); 
    JButton upButton = new JButton("up"); 
    JButton downButton = new JButton("down"); 

    JPanel directionButtonPanel = new JPanel(); 
    // directionButtonPanel.setOpaque(false); 
    directionButtonPanel.setLayout(new BoxLayout(directionButtonPanel, BoxLayout.Y_AXIS)); 

    JPanel directionRow_1 = new JPanel(); 
    // directionRow_1.setOpaque(false); 
    directionRow_1.setLayout(new BoxLayout(directionRow_1, BoxLayout.X_AXIS)); 
    directionRow_1.add(Box.createRigidArea(northButton.getPreferredSize())); 
    directionRow_1.add(northButton); 
    directionRow_1.add(Box.createRigidArea(northButton.getPreferredSize())); 
    directionRow_1.add(upButton); 

    JPanel directionRow_2 = new JPanel(); 
    // directionRow_2.setOpaque(false); 
    directionRow_2.setLayout(new BoxLayout(directionRow_2, BoxLayout.X_AXIS)); 
    directionRow_2.add(westButton); 
    directionRow_2.add(Box.createRigidArea(northButton.getPreferredSize())); 
    directionRow_2.add(eastButton); 
    directionRow_2.add(Box.createRigidArea(northButton.getPreferredSize())); 

    JPanel directionRow_3 = new JPanel(); 
    // directionRow_3.setOpaque(false); 
    directionRow_3.setLayout(new BoxLayout(directionRow_3, BoxLayout.X_AXIS)); 
    directionRow_3.add(Box.createRigidArea(northButton.getPreferredSize())); 
    directionRow_3.add(southButton); 
    directionRow_3.add(Box.createRigidArea(northButton.getPreferredSize())); 
    directionRow_3.add(downButton); 

    upButton.setMaximumSize(southButton.getPreferredSize()); 
    northButton.setMaximumSize(southButton.getPreferredSize()); 
    westButton.setMaximumSize(southButton.getPreferredSize()); 
    southButton.setMaximumSize(southButton.getPreferredSize()); 
    downButton.setMaximumSize(southButton.getPreferredSize()); 
    eastButton.setMaximumSize(southButton.getPreferredSize()); 

    directionButtonPanel.add(directionRow_1); 
    directionButtonPanel.add(directionRow_2); 
    directionButtonPanel.add(directionRow_3); 

}

来源

2014-12-04 mmgro27

1，simpest是通过将12个JButtuns（休息不应该调用setVisible（假）），2。更好的是搜索这里操纵杆或东西，看起来像作为导航键（如电视遥控） – mKorbel 2014-12-04 11:03:25

所以上面的图像是你需要的吗？或者你从显示的代码中得到了什么？我很困惑..使用'GridLayout'很容易创建图像。 – 2014-12-04 11:23:22

'GridBagLayout' .... – MadProgrammer 2014-12-04 12:03:49

试试这个。正如JavaDoc所说，GridLayout似乎是合适的：Creates a grid layout with the specified number of rows and columns. All components in the layout are given equal size.还可以节省您自行安排行的麻烦。只需将所有内容添加到您的directionButtonPanel。

JButton northButton = new JButton("north"); 
    JButton southButton = new JButton("south"); 
    JButton westButton = new JButton("west"); 
    JButton eastButton = new JButton("east"); 
    JButton upButton = new JButton("up"); 
    JButton downButton = new JButton("down"); 

    JPanel directionButtonPanel = new JPanel(); 
    directionButtonPanel.setLayout(new GridLayout(3,4)); 

    // row 1 
    directionButtonPanel.add(new JPanel()); 
    directionButtonPanel.add(northButton); 
    directionButtonPanel.add(new JPanel()); 
    directionButtonPanel.add(upButton); 

    // row 2 
    directionButtonPanel.add(westButton); 
    directionButtonPanel.add(new JPanel()); 
    directionButtonPanel.add(eastButton); 
    directionButtonPanel.add(new JPanel()); 

    // row 3 
    directionButtonPanel.add(new JPanel()); 
    directionButtonPanel.add(southButton); 
    directionButtonPanel.add(new JPanel()); 
    directionButtonPanel.add(downButton);

来源

2014-12-04 12:35:36 geert3

在JPanel中以特定方式定位按钮

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