Java GridBagConstraints 的问题

Question

对于我个人项目的一部分，我想在我的程序中添加一个音乐播放器。但是，当我尝试使用 GridBagConstraintsLayout 在标签正下方制作 3 个按钮（播放、暂停和停止）时，布局看起来就像我附加的图片一样奇怪。我不想让播放按钮很长。我希望所有 3 个按钮的长度相等并直接位于标签下方。有人可以帮我解决这个问题，也许可以发布代码来帮助我吗？附上我现在拥有的图片，我还包含了一些代码。panel = new JPanel(new GridBagLayout());        add(panel);        GridBagConstraints c = new GridBagConstraints();        label1 = new JLabel("This is the MaryLand State Song. After exiting, press enter");         c.gridx = 0;        c.gridy = 0;        panel.add(label1,c);        play = new JButton("Play");        c.gridx = 0;        c.gridy = 2;        c.fill = GridBagConstraints.HORIZONTAL;        panel.add(play,c);        pause = new JButton("Pause");        c.gridx = 1;        c.gridy = 2;        c.fill = GridBagConstraints.HORIZONTAL;        panel.add(pause,c);        stop = new JButton("Stop");        c.gridx = 2;        c.gridy = 2;        c.fill = GridBagConstraints.HORIZONTAL;        panel.add(stop,c);

Answer 1

希望这可以帮助

GridBagLayout lay = new GridBagLayout();

// three columns with same weights

lay.columnWeights = new double[] {1,1,1};

panel = new JPanel(lay);

add(panel);

GridBagConstraints c = new GridBagConstraints();

label1 = new JLabel("This is the MaryLand State Song. After exiting, press enter"); 

c.gridx = 0; c.gridy = 0;

// make label span all next to last columns (cells)

c.gridwidth = GridBagConstraints.REMAINDER;

panel.add(label1,c);

c.gridwidth = GridBagConstraints.BOTH;

c.fill = GridBagConstraints.HORIZONTAL;

play = new JButton("Play");

c.gridx = 0; c.gridy = 1;

panel.add(play,c);

pause = new JButton("Pause");

c.gridx = 1; c.gridy = 1;

panel.add(pause,c);

stop = new JButton("Stop");

c.gridx = 2; c.gridy = 1;

panel.add(stop,c);