在Java swing中，GridBagLayout与JPanel没有预期的对齐

Question

我想使用gridbaglayout（包含6 JPanels）+使用从右到左的方向创建可调整大小的框架。在添加第5个和第6个JPanel预期对齐后，它的工作状态一直持续到JPanel。

请指导我进行预期的调整。

预期输出

import java.awt.*;
import javax.swing.*;

public class FrameGUI {
public static void addComponentsToPane(Container pane){
    pane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);

    JPanel blackPanel,bluePanel,greenPanel,orangePanel,pinkPanel,redPanel;

    pane.setLayout(new GridBagLayout());
    GridBagConstraints c=new GridBagConstraints();
    c.fill=GridBagConstraints.BOTH;
    pane.setPreferredSize(new Dimension(600,660));

    //################################################## BLACK JPanel
    blackPanel=new JPanel(new GridBagLayout());
    c.weightx=0.8;
    c.weighty=0.3;
    c.fill=GridBagConstraints.BOTH;
    c.gridwidth=2;
    c.gridheight=1;
    c.gridx=0;
    c.gridy=0;

    blackPanel.setBackground(Color.black);
    pane.add(blackPanel, c);

    //################################################## BLUE JPanel
    bluePanel=new JPanel(new GridBagLayout());
    c.fill=GridBagConstraints.BOTH;
    c.weightx=0.8;
    c.weighty=0.1;
    c.gridheight=1;
    c.gridwidth=2;
    c.gridx=0;
    c.gridy=1;

    bluePanel.setBackground(Color.blue);
    pane.add(bluePanel, c);

    //################################################## GREEN JPanel
    greenPanel=new JPanel(new GridBagLayout());
    c.fill=GridBagConstraints.BOTH;
    c.weightx=0.2;
    c.weighty=0.4;
    c.gridwidth=1;
    c.gridheight=2;
    c.gridx=2;
    c.gridy=0;

    greenPanel.setBackground(Color.green);
    pane.add(greenPanel, c);

    //################################################## ORANGE JPanel
    orangePanel=new JPanel(new GridBagLayout());
    c.fill=GridBagConstraints.BOTH;
    c.weightx=1.0;
    c.weighty=0.2;
    c.gridheight=1;
    c.gridwidth=3;
    c.gridx=0;
    c.gridy=2;

    orangePanel.setBackground(Color.orange);
    pane.add(orangePanel, c);

    //################################################## PINK JPanel
    pinkPanel=new JPanel(new GridBagLayout());
    c.fill=GridBagConstraints.BOTH;
    c.weightx=0.2;
    c.weighty=0.4;
    c.gridheight=1;
    c.gridwidth=1;
    c.gridx=0;
    c.gridy=3;

    pinkPanel.setBackground(Color.pink);
    pane.add(pinkPanel, c);

    //################################################## RED JPanel
    redPanel=new JPanel(new GridBagLayout());
    c.fill=GridBagConstraints.BOTH;
    c.weightx=0.8;
    c.weighty=0.4;
    c.gridheight=1;
    c.gridwidth=2;
    c.gridx=1;
    c.gridy=3;

    redPanel.setBackground(Color.red);
    pane.add(redPanel, c);

}

 private static void createAndShowGUI() {
        JFrame frame = new JFrame("GridBagLayoutDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        addComponentsToPane(frame.getContentPane());

        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}