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Java Swing - 如何使组件与GridBagLayout对齐...

layout 【layout】
我们想知道如何使组件与GridBagLayout对齐。...
代码展示 运行结果 
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Main {
  public static void main(String[] args) {
    JFrame dialog = new JFrame();
    dialog.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    dialog.setResizable(true); 

    JPanel guiHolder = new JPanel();
    guiHolder.setLayout(new GridBagLayout());
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.gridx = 0;
    gbc.gridy = 0;
    gbc.anchor = GridBagConstraints.PAGE_START;
    gbc.weightx = 1.0;
    gbc.weighty = 1.0;
    guiHolder.add(new JLabel("my test"), gbc);

    dialog.add(guiHolder);
    dialog.setSize(new Dimension(320, 240));
    dialog.setVisible(true);
  }
}