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();
}
});
}
}
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