swing gridlayout 网格不一样大小

在Swing的GridLayout中，每个单元格的大小是相等的。如果你想要某些单元格的大小不同，你可以考虑使用GridBagLayout布局管理器。GridBagLayout允许您通过指定单元格的网格位置和大小来实现更高级别的布局。

以下是一个使用GridBagLayout的示例代码：

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;

public class GridBagLayoutExample {

    public static void main(String[] args) {
        JFrame frame = new JFrame("GridBagLayout Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);

        GridBagLayout layout = new GridBagLayout();
        frame.setLayout(layout);

        JButton button1 = new JButton("Button 1");
        GridBagConstraints constraints1 = new GridBagConstraints();
        constraints1.gridx = 0;
        constraints1.gridy = 0;
        constraints1.gridwidth = 1;
        constraints1.gridheight = 1;
        constraints1.fill = GridBagConstraints.BOTH;
        constraints1.weightx = 1.0;
        constraints1.weighty = 1.0;
        layout.setConstraints(button1, constraints1);
        frame.add(button1);

        JButton button2 = new JButton("Button 2");
        GridBagConstraints constraints2 = new GridBagConstraints();
        constraints2.gridx = 1;
        constraints2.gridy = 0;
        constraints2.gridwidth = 2;
        constraints2.gridheight = 1;
        constraints2.fill = GridBagConstraints.BOTH;
        constraints2.weightx = 1.0;
        constraints2.weighty = 1.0;
        layout.setConstraints(button2, constraints2);
        frame.add(button2);

        JButton button3 = new JButton("Button 3");
        GridBagConstraints constraints3 = new GridBagConstraints();
        constraints3.gridx = 0;
        constraints3.gridy = 1;
        constraints3.gridwidth = 1;
        constraints3.gridheight = 2;
        constraints3.fill = GridBagConstraints.BOTH;
        constraints3.weightx = 1.0;
        constraints3.weighty = 1.0;
        layout.setConstraints(button3, constraints3);
        frame.add(button3);

        JButton button4 = new JButton("Button 4");
        GridBagConstraints constraints4 = new GridBagConstraints();
        constraints4.gridx = 1;
        constraints4.gridy = 1;
        constraints4.gridwidth = 2;
        constraints4.gridheight = 2;
        constraints4.fill = GridBagConstraints.BOTH;
        constraints4.weightx = 1.0;
        constraints4.weighty = 1.0;
        layout.setConstraints(button4, constraints4);
        frame.add(button4);

        frame.setVisible(true);
    }
}

在这个例子中，我们使用了GridBagConstraints类来定义每个组件的约束条件，包括网格位置和大小，以及水平和垂直权重。这些约束条件告诉布局管理器如何分配空间和放置组件。