JAVASwing GridBagLayout 布局

用GridBagLayout可实现复杂可控的布局。

以一个输入框为例：

final  JTextField   username = new JTextField();

final  JTextField   password = new JTextField();

JPanel  regist = new JPanel();

regist.setLayout(new GridBagLayout());
regist.add(new JLabel("username:"),
new GridBagConstraints(0,0,1,1,
0.0,0.0,
GridBagConstraints.CENTER,
GridBagConstraints.NONE,
new Insets(2,2,2,2),
0,0));

regist.add(username,
new GridBagConstraints(1,0,1,1,
0.0,0.0,
GridBagConstraints.CENTER,
GridBagConstraints.NONE,
new Insets(2,2,2,2),
200,0));
regist.add(new JLabel("password"),
new GridBagConstraints(0,1,1,1,
0.0,0.0,
GridBagConstraints.CENTER,
GridBagConstraints.NONE,
new Insets(2,2,2,2),
0,0));

regist.add(password,
new GridBagConstraints(1,1,1,1,
0.0,0.0,
GridBagConstraints.CENTER,
GridBagConstraints.NONE,
new Insets(2,2,2,2),
200,0));

这里面用到了GridBagConstraints 来定义组件的位置排列信息。

最终的效果如下：



后面输入框的长度可以修改值200 来改变。

具体GridBagConstraints 可参见GridBagConstraints