使用
GridBagLayout具有默认约束的。这是一个小的演示代码：
import java.awt.GridBagConstraints;import java.awt.GridBagLayout;import javax.swing.Jframe;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.SwingUtilities;public class TestVerticalAlignement { protected void initUI() { final Jframe frame = new Jframe(); frame.setTitle("Test vertical alignement"); frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); JPanel panel = new JPanel(); panel.setLayout(new GridBagLayout()); GridBagConstraints gbc = new GridBagConstraints(); JLabel label1 = new JLabel("label1"); JLabel label2 = new JLabel("label2"); panel.add(label1, gbc); panel.add(label2, gbc); frame.add(panel); frame.setSize(300, 300); frame.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new TestVerticalAlignement().initUI(); } }); }}
