Java 是否保留GridBagLayout组件顺序？

我对GridBagLayout有问题。我必须更换一个部件，但在插入新部件后，位置会发生变化。请参见以下代码作为示例。 开始时为青色和黄色（从左到右）。更换后，它是黄色和红色的。我想要的结果是红色和黄色。我如何（使用GridBagLayout）修复此问题

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我认为您使用的布局不正确。 您应该使用BorderLayout而不是GridBagLayout。或者使用gridx和gridy属性设置每个面板应分配的单元格

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

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

public class GBLTest extends JFrame
{
    public static void main(String [] args)
    {
        new GBLTest();
    }

    JPanel panelA;
    JPanel panelB;
    JPanel panelAReplacement;

    GBLTest()
    {
        this.setLayout(new GridBagLayout());

        GridBagConstraints consA = new GridBagConstraints();
        consA.weightx = 1.0;
        consA.weighty = 1.0;
        consA.fill = GridBagConstraints.BOTH;
        consA.gridx = 0;
        consA.gridy = 0;

        GridBagConstraints consB = new GridBagConstraints();
        consB.weightx = 1.0;
        consB.weighty = 1.0;
        consB.fill = GridBagConstraints.BOTH;
        consB.gridx = 1;
        consB.gridy = 0;

        panelA = new JPanel();
        panelA.setBackground(Color.CYAN);

        panelB = new JPanel();
        panelB.setBackground(Color.YELLOW);

        panelAReplacement = new JPanel();
        panelAReplacement.setBackground(Color.RED);


        consA.anchor = GridBagConstraints.EAST;
        this.add(panelA, consA);
        consA.anchor = GridBagConstraints.WEST;
        this.add(panelB, consB);

        GridBagConstraints oldCons = ((GridBagLayout)     this.getContentPane().getLayout()).getConstraints(panelA);
        this.remove(panelA);
        this.add(panelAReplacement, oldCons);

        this.setSize(new Dimension(200, 200));
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

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您应该添加java标记，否则问题可能不会被正确的人看到；）好的，与使用网格约束的GBL一样，如果我为panelAReplacement设置preferredSize，它不会影响GUI。是否可以将您的解决方案用于网格，但使用组件的首选大小（使用GBL）？我知道我可以使用weightx来解决这个问题，但我不知道weightx的固定值，因为我想使用动态计算的首选值…：(

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

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

public class GBLTest extends JFrame
{
    public static void main(String [] args)
    {
        new GBLTest();
    }

    JPanel panelA;
    JPanel panelB;
    JPanel panelAReplacement;

    GBLTest()
    {
        this.setLayout(new GridBagLayout());

        GridBagConstraints consA = new GridBagConstraints();
        consA.weightx = 1.0;
        consA.weighty = 1.0;
        consA.fill = GridBagConstraints.BOTH;
        consA.gridx = 0;
        consA.gridy = 0;

        GridBagConstraints consB = new GridBagConstraints();
        consB.weightx = 1.0;
        consB.weighty = 1.0;
        consB.fill = GridBagConstraints.BOTH;
        consB.gridx = 1;
        consB.gridy = 0;

        panelA = new JPanel();
        panelA.setBackground(Color.CYAN);

        panelB = new JPanel();
        panelB.setBackground(Color.YELLOW);

        panelAReplacement = new JPanel();
        panelAReplacement.setBackground(Color.RED);


        consA.anchor = GridBagConstraints.EAST;
        this.add(panelA, consA);
        consA.anchor = GridBagConstraints.WEST;
        this.add(panelB, consB);

        GridBagConstraints oldCons = ((GridBagLayout)     this.getContentPane().getLayout()).getConstraints(panelA);
        this.remove(panelA);
        this.add(panelAReplacement, oldCons);

        this.setSize(new Dimension(200, 200));
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}