如何解决GridLayout / GridBagConstraints中的错误？

Question

为什么GridLayot在Swing Java中不起作用？

我需要将元素放置在混凝土单元格上，但是它们放置了错误的(picture)

如何在具有网格布局的Java Swing中将元素放置到具体单元中？

我的代码：

package com.KvaksManYT;

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

public class GUI extends JFrame {
    public GUI() {
        super("Test");
        setBounds(100, 100, 250, 100);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Container container = this.getContentPane();
        container.setLayout(new GridLayout(3, 2, 2, 2));
        container.add(but1, onPosition(1, 2));
        container.add(but2, onPosition(2, 2));
        container.add(but3, onPosition(1, 1));
        container.add(but4, onPosition(2, 1));
    }

    private JButton but1 = new JButton("Press 1");
    private JButton but2 = new JButton("Press 2");
    private JButton but3 = new JButton("Press 3");
    private JButton but4 = new JButton("Press 4");

    private GridBagConstraints onPosition(int x, int y) {
        GridBagConstraints layConstraints = new GridBagConstraints();
        layConstraints.fill = GridBagConstraints.BOTH;
        layConstraints.gridx = x;
        layConstraints.gridy = y;
        return layConstraints;
    }
}

Answer 1

GridBagConstraints用于Grid Bag Layout，而不是Grid Layout。

Answer 2

您也必须​​从0开始计数：

public class GUI extends JFrame {
    public GUI() {
        super("Test");
        setBounds(100, 100, 250, 100);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        GridBagConstraints layConstraints = new GridBagConstraints();
        layConstraints.fill  = GridBagConstraints.NONE;
        layConstraints.insets = new Insets(3, 2, 2, 2);

        Container container = this.getContentPane();
        container.setLayout(new GridBagLayout());

        container.add(but1, onPosition(0, 1, layConstraints));
        container.add(but2, onPosition(1, 1, layConstraints));
        container.add(but3, onPosition(0, 0, layConstraints));
        container.add(but4, onPosition(1, 0, layConstraints));

    }