想问个简单的问题来理解一下这种布局方式~！

Question

向一个GroupLayout布局的面板添加两个标签，要求两个标签大小一样，上下排列，并且左边对齐，代码应该怎么写呢？

Answer 1

也是第一次接触，了解不深，在API文档上看了下，在swing包里~下面是API的一段代码，参考下：import java.awt.*;import javax.swing.*;import javax.swing.GroupLayout.Alignment;public class TestGroupLayout {/*** @param args*/public static void main(String[] args) {Frame f = new Frame();f.setBounds(200,200,200,100);Panel panel = new Panel();GroupLayout layout = new GroupLayout(panel);panel.setLayout(layout);layout.setAutoCreateGaps(true);layout.setAutoCreateContainerGaps(true);GroupLayout.SequentialGroup hGroup = layout.createSequentialGroup();Label label1 = new Label("username");Label label2 = new Label("password");TextField tf1 = new TextField();TextField tf2 = new TextField();hGroup.addGroup(layout.createParallelGroup().addComponent(label1).addComponent(label2));hGroup.addGroup(layout.createParallelGroup().addComponent(tf1).addComponent(tf2));layout.setHorizontalGroup(hGroup);GroupLayout.SequentialGroup vGroup = layout.createSequentialGroup();vGroup.addGroup(layout.createParallelGroup(Alignment.BASELINE).addComponent(label1).addComponent(tf1));vGroup.addGroup(layout.createParallelGroup(Alignment.BASELINE).addComponent(label2).addComponent(tf2));layout.setVerticalGroup(vGroup);f.add(panel);f.setVisible(true);}}

Answer 2

- -!既然不常见就是用得不多，GridBagLayout几乎可以满足你所有的布局方式了