Question

我正在关注this教程并设置我的GUI。我想要一个textarea应该占据整个宽度（所有列），但它不会发生，屏幕就像这样：

此青色字段应捕获整个屏幕的宽度。以下是我的代码：

代码

package com.company.app;

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


public class SpamGUI {

    public static void main(String[] args) {
        System.out.println("Loading Program..");
        try {
            UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
        } catch (Exception e) {
            e.printStackTrace();
        }
        JFrame frame = new JFrame("Evil App");
        frame.setSize(800, 500);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //frame.setResizable(false);


        JPanel panel = new JPanel();

        panel.setLayout(new GridLayout(3, 3));
        //panel.setLayout(new GridLayout());

        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.HORIZONTAL;

        panel.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);

        /**
         * Training File Section Path
         */
        JLabel lblTrainPath = new JLabel("Enter Training Folder Path");
        lblTrainPath.setSize(100, 10);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 0;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(lblTrainPath, c);

        JTextField txtTrainPath = new JTextField();
        txtTrainPath.setSize(100, 20);
        c.fill = GridBagConstraints.FIRST_LINE_END;
        c.gridx = 0;
        c.gridy = 1;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(txtTrainPath, c);

        JButton btnTrainPath = new JButton("Browse..");
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 2;
        c.weightx = 0.5;
        c.weighty = 0.5;
        c.gridwidth = 3;
        panel.add(btnTrainPath, c);

        /**
         * Testing File Section Path
         */

        JLabel lblTestingPath = new JLabel("Enter Testing Folder Path");
        c.fill = GridBagConstraints.FIRST_LINE_END;
        c.gridx = 1;
        c.gridy = 0;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(lblTestingPath, c);

        JTextField txtTestPath = new JTextField();
        c.fill = GridBagConstraints.FIRST_LINE_END;
        c.gridx = 1;
        c.gridy = 1;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(txtTestPath, c);

        JButton btnTestPath = new JButton("Browse..");
        c.fill = GridBagConstraints.FIRST_LINE_END;
        c.gridx = 1;
        c.gridy = 2;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(btnTestPath, c);

        /**
         * Pogress Section
         */
        JTextArea txtProgress = new JTextArea();
        txtProgress.setBackground(Color.cyan);
        txtProgress.setOpaque(true);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 2;
        c.gridy = 0;
        c.ipadx = 50;
        c.weightx = 0.5;
        c.weighty = 0.5;
        c.gridwidth = 2;

        panel.add(txtProgress, c);

        frame.add(panel);
        frame.pack();
        frame.setVisible(true);

    }
}

Answer 1

布局错误。
gridx / gridy订单被撤销。
gridwidth过早地随机设置为3。
文本字段宽度应设置为列。
应在列和行中指定文本区域大小。

..这就是我记得的变化。

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

public class SpamGUI {

    public static void main(String[] args) {
        System.out.println("Loading Program..");
        try {
            UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
        } catch (Exception e) {
            e.printStackTrace();
        }
        JFrame frame = new JFrame("Evil App");
        //frame.setSize(800, 500);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //frame.setResizable(false);


        JPanel panel = new JPanel();

        panel.setLayout(new GridBagLayout());
        //panel.setLayout(new GridLayout());

        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.HORIZONTAL;

        panel.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);

        /**
         * Training File Section Path
         */
        JLabel lblTrainPath = new JLabel("Enter Training Folder Path");
        //lblTrainPath.setSize(100, 10);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 0;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(lblTrainPath, c);

        JTextField txtTrainPath = new JTextField(10);
        //txtTrainPath.setSize(100, 20);
        c.fill = GridBagConstraints.FIRST_LINE_END;
        c.gridx = 1;
        c.gridy = 0;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(txtTrainPath, c);

        JButton btnTrainPath = new JButton("Browse..");
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 2;
        c.gridy = 0;
        c.weightx = 0.5;
        c.weighty = 0.5;
        //c.gridwidth = 3;
        panel.add(btnTrainPath, c);

        /**
         * Testing File Section Path
         */

        JLabel lblTestingPath = new JLabel("Enter Testing Folder Path");
        c.fill = GridBagConstraints.FIRST_LINE_END;
        c.gridx = 0;
        c.gridy = 1;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(lblTestingPath, c);

        JTextField txtTestPath = new JTextField(10);
        c.fill = GridBagConstraints.FIRST_LINE_END;
        c.gridx = 1;
        c.gridy = 1;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(txtTestPath, c);

        JButton btnTestPath = new JButton("Browse..");
        c.fill = GridBagConstraints.FIRST_LINE_END;
        c.gridx = 2;
        c.gridy = 1;
        c.weightx = 0.5;
        c.weighty = 0.5;
        panel.add(btnTestPath, c);

        /**
         * Pogress Section
         */
        JTextArea txtProgress = new JTextArea(5,15);
        txtProgress.setBackground(Color.cyan);
        txtProgress.setOpaque(true);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 2;
        c.ipadx = 50;
        c.weightx = 0.5;
        c.weighty = 0.5;
        c.gridwidth = 3;

        panel.add(txtProgress, c);

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

分手提示：

GUI非常需要一些空白区域。改变一些改变：

    c.fill = GridBagConstraints.HORIZONTAL;

要：

    c.fill = GridBagConstraints.HORIZONTAL;
    c.insets = new Insets(5,5,5,5);

无法在GridBag布局中增加单元格宽度

1 个答案:

分手提示：