java - java 文本区域错误

Question

我的 JText 区域无法工作。您将看到是否运行此代码。尽管我已经设置了一个明确的位置，但 textArea 仍然会去不同的地方。 textArea 的代码是第 57 行。

我真正需要的是 testArea 保持固定位置，第 57 行对此进行了解释。

注意:“pain”是包含 textArea 的 JPanel

public Graphics g;

public void paint(Graphics g) {

    Graphics2D projectFinder = (Graphics2D) g;
    projectFinder.setColor(Color.GRAY);
    projectFinder.fillRect(0, 0, 1000, 50);
    projectFinder.setStroke(new BasicStroke(100));

    Graphics2D OutPut = (Graphics2D) g;
    OutPut.setColor(Color.LIGHT_GRAY);
    OutPut.fillRect(553, 60, 535, 670);
    OutPut.drawString("Project Input (Your Code)", 30, 90);

    Graphics2D console = (Graphics2D) g;
    console.setColor(Color.WHITE);
    console.fillRect(563, 620, 515, 100);

    console.setColor(Color.BLACK);
    console.drawString("Console.ChemLOG", 570, 640);

}

public static void main(String[] args) {

    JPanel pnlButton = new JPanel();
    pnlButton.setBounds(800, 100, 100, 100);

    JButton button = new JButton("Add Project");
    button.setBounds(1000, 0, 100, 50);

    JFrame frame = new JFrame("GenoTECH IDE 1.0.0");
    frame.add(new MainScreen());
    frame.setSize(1100, 800);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(button);
    button.addActionListener(new NewProject());

    // TextBox

    JPanel pain = new JPanel();
    JTextArea area = new JTextArea();
    area.setSize(535, 670);
    area.setLocation(0, 0);

    pain.setLocation(10, 60);
    pain.setSize(area.getSize());

    pain.add(area);

    frame.add(pain);
}

// add project button
static class NewProject implements ActionListener {
    public void actionPerformed(ActionEvent e) {

        JButton buttonOK = new JButton("Ok");
        buttonOK.setBounds(0, 233, 150, 45);

        JButton buttonCn = new JButton("Cancel");
        buttonCn.setBounds(150, 233, 150, 45);

        JFrame frame2 = new JFrame("New Project");
        frame2.setSize(300, 300);
        frame2.setVisible(true);
        frame2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame2.add(buttonOK);
        frame2.add(buttonCn);
        buttonCn.addActionListener(new buttonCN());

    }

    static class buttonCN implements ActionListener {
        public void actionPerformed(ActionEvent e) {

            System.exit(0);

        }
    }
}

}

现在代码更新了，我已经让 JTextArea 可以正常工作而不会搞乱，但是由于某种原因，2D 图形没有被调用。我还在使用一些 Java 布局格式开发另一种布局。

新代码:

private static final long serialVersionUID = 1L;
public Graphics g;

public void paint(Graphics g) {

    Graphics2D projectFinder = (Graphics2D) g;
    projectFinder.setColor(Color.GRAY);
    projectFinder.fillRect(0, 0, 1000, 50);
    projectFinder.setStroke(new BasicStroke(100));

    Graphics2D OutPut = (Graphics2D) g;
    OutPut.setColor(Color.LIGHT_GRAY);
    OutPut.fillRect(553, 60, 535, 670);
    OutPut.drawString("Project Input (Your Code)", 30, 90);

    Graphics2D console = (Graphics2D) g;
    console.setColor(Color.WHITE);
    console.fillRect(563, 620, 515, 100);

    console.setColor(Color.BLACK);
    console.drawString("Console.ChemLOG", 570, 640);

}

public static void main(String[] args) {        
    JButton button = new JButton("Add Project");
    button.setBounds(1000, 0, 100, 50);
    //button.setSize(5,5);
    //button.setLocation(1,1);

    JFrame frame = new JFrame("GenoTECH IDE 1.0.0");
    frame.setLayout(null);
    frame.add(new MainScreen());
    frame.setSize(1100, 800);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(button);
    button.addActionListener(new NewProject());

    // Thing to Change
    JTextArea area = new JTextArea();
    area.setSize(535, 670);
    area.setLocation(10, 60);

    frame.add(area);
}


// add project button
static class NewProject implements ActionListener {
    public void actionPerformed(ActionEvent e) {

        JButton buttonOK = new JButton("Ok");
        buttonOK.setBounds(0, 233, 150, 45);

        JButton buttonCn = new JButton("Cancel");
        buttonCn.setBounds(150, 233, 150, 45);

        JFrame frame2 = new JFrame("New Project");
        frame2.setSize(300, 300);
        frame2.setVisible(true);
        frame2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame2.add(buttonOK);
        frame2.add(buttonCn);
    }
}

Answer 1

我不确定你想做什么。这是带有 Swing 布局的代码的可运行版本。

这是我所做的更改。

1. 我通过调用 SwingUtilities invokeLater 方法启动了应用程序。这确保了在 Event Dispatch thread (EDT) 上创建和修改 Swing 组件。 .

2. 执行 JFrame 方法的顺序非常重要。我修正了顺序。

3. 您可以使用paintComponent 方法在JPanel 上绘图。您必须在绘制代码之前调用 super。

4. 您仅设置绘图面板的大小。您可以使用 JFrame pack 方法来调整其余 Swing 组件的大小。

5. 正如其他人提到的，您使用 Swing layouts布置 Swing 组件。

.

package com.ggl.testing;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;

public class GenoTech implements Runnable {

    @Override
    public void run() {
        JFrame frame = new JFrame("GenoTECH IDE 1.0.0");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel mainPanel = new JPanel();
        mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.PAGE_AXIS));

        mainPanel.add(new DrawingPanel());

        JPanel pnlButton = new JPanel();

        JButton button = new JButton("Add Project");
        button.addActionListener(new NewProjectActionListener());
        pnlButton.add(button);

        mainPanel.add(pnlButton);

        JPanel pain = new JPanel();
        JTextArea area = new JTextArea();
        pain.add(area);

        mainPanel.add(pain);

        frame.add(mainPanel);

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

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new GenoTech());
    }

    public class DrawingPanel extends JPanel {

        private static final long serialVersionUID = -5718559965267054844L;

        public DrawingPanel() {
            this.setPreferredSize(new Dimension(700, 300));
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);

            Graphics2D g2d = (Graphics2D) g;
            g2d.setColor(Color.GRAY);
            g2d.fillRect(0, 0, 700, 50);
            g2d.setStroke(new BasicStroke(100));

            g2d.setColor(Color.LIGHT_GRAY);
            g2d.fillRect(553, 60, 535, 300);
            g2d.drawString("Project Input (Your Code)", 30, 90);

            g2d.setColor(Color.WHITE);
            g2d.fillRect(563, 620, 515, 100);

            g2d.setColor(Color.BLACK);
            g2d.drawString("Console.ChemLOG", 570, 640);
        }

    }

    // add project button
    public class NewProjectActionListener implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {

            JFrame frame2 = new JFrame("New Project");
            frame2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

            JPanel mainPanel = new JPanel();

            JButton buttonOK = new JButton("Ok");
            mainPanel.add(buttonOK);

            JButton buttonCn = new JButton("Cancel");
            buttonCn.addActionListener(new ButtonCNActionListener());
            mainPanel.add(buttonCn);

            frame2.add(mainPanel);
            frame2.pack();
            frame2.setLocationByPlatform(true);
            frame2.setVisible(true);
        }

        public class ButtonCNActionListener implements ActionListener {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        }
    }

}