Java的GridBagConstraints对象的gridx和gridy不工作？

问题描述

我试图使用的gridx 和 gridy 约束来定位我的按钮。但他们没有工作！如果我更改的gridx 和 gridy 变量，没有任何反应。如果我将填充更改为的GridBagConstraints 到无，它仍然无法正常工作。

我失去了一些东西在这里？

 进口java.awt中的*。
进口的javax.swing *。公共类窗口扩展的JFrame {
    私有静态最后的serialVersionUID长1L =;    JFrame的帧=新的JFrame（GUI）;
    JTextField的用户名=新的JTextField（20）;    公共无效的CreateWindow（）{
        JPanel的窗格=新JPanel（）;
        pane.setLayout（新的GridBagLayout（））;
        GridBagConstraints的C =新的GridBagConstraints（）;        c.fill = GridBagConstraints.NONE;        JButton的按钮=的新的JButton（按钮1）;
        c.weightx = 1.0;
        c.weighty = 1.0;
        c.gridx = 3; //没有任何影响
        c.gridy = 5; //没有任何影响
        c.anchor = GridBagConstraints.NORTHWEST; //如果我删除此，它仍然无法正常工作。
        pane.add（按钮，c）;
        frame.setDefaultCloseOperation（EXIT_ON_CLOSE）;
        frame.setSize（400，600）;
        frame.setResizable（真）;
        frame.setLocationRelativeTo（NULL）;
        frame.add（面板）;
        frame.setVisible（真）;
    }
}
 

如果这是难以辨认，这里是问题所在：

 的JP​​anel面板=新JPanel（）;
            pane.setLayout（新的GridBagLayout（））;
            GridBagConstraints的C =新的GridBagConstraints（）;            c.fill = GridBagConstraints.NONE;            JButton的按钮=的新的JButton（按钮1）;
            c.weightx = 1.0;
            c.weighty = 1.0;
            c.gridx = 3; //没有任何影响
            c.gridy = 5; //没有任何影响
            c.anchor = GridBagConstraints.NORTHWEST; //如果我删除此，它仍然无法正常工作。
            pane.add（按钮，c）;
 

解决方案

它已经一段时间，因为我做了挥杆的布局，但不为gridx和gridY只有有特效，如果你在你的JPanel多个JComponent的吗？看来你只有一个JButton，所以GridBagLayout中没有任何的布局做的。

I am trying to use the gridx and gridy constraints to position my button. But they do not work! If I change the gridx and gridy variables, nothing happens. If I change the fill to GridBagConstraints to NONE, it still does not work.

Am I missing something here?

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

public class Window extends JFrame{
    private static final long serialVersionUID = 1L;

    JFrame frame = new JFrame("GUI");
    JTextField username = new JTextField(20);

    public void CreateWindow(){
        JPanel pane = new JPanel();
        pane.setLayout(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();

        c.fill = GridBagConstraints.NONE;

        JButton button = new JButton("Button 1");
        c.weightx = 1.0;
        c.weighty = 1.0;
        c.gridx = 3;   //Has no effect
        c.gridy = 5;   //Has no effect
        c.anchor = GridBagConstraints.NORTHWEST;//If I remove this, it still does not work.
        pane.add(button, c);
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.setSize(400, 600);
        frame.setResizable(true);
        frame.setLocationRelativeTo(null);
        frame.add(pane);
        frame.setVisible(true);
    }
}

If that is hard to read, here is where the problem lies:

JPanel pane = new JPanel();
            pane.setLayout(new GridBagLayout());
            GridBagConstraints c = new GridBagConstraints();

            c.fill = GridBagConstraints.NONE;

            JButton button = new JButton("Button 1");
            c.weightx = 1.0;
            c.weighty = 1.0;
            c.gridx = 3;   //Has no effect
            c.gridy = 5;   //Has no effect
            c.anchor = GridBagConstraints.NORTHWEST;    //If I remove this, it still does not work.
            pane.add(button, c);

解决方案

It's been a while since I've done swing layouts, but don't gridX and gridY only have effects if you have more than one JComponent in your JPanel? It seems you only have a JButton, so the GridBagLayout doesn't have any layout to do.

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