Question

我在JSplitPane创建了一个分隔符。我无法设置分隔符的颜色。我想设置分隔符的颜色。请帮我设置该分隔符的颜色。

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

public class SplitPaneDemo {

    JFrame frame;
    JPanel left, right;
    JSplitPane pane;
    int lastDividerLocation = -1;

    public static void main(String[] args) {
        SplitPaneDemo demo = new SplitPaneDemo();
        demo.makeFrame();
        demo.frame.addWindowListener(new WindowAdapter() {

            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        demo.frame.show();
    }

    public JFrame makeFrame() {
        frame = new JFrame();
        // Create a horizontal split pane.
        pane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
        left = new JPanel();
        left.setBackground(Color.red);
        pane.setLeftComponent(left);
        right = new JPanel();
        right.setBackground(Color.green);
        pane.setRightComponent(right);

        JButton showleft = new JButton("Left");
        showleft.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                Container c = frame.getContentPane();
                if (pane.isShowing()) {
                    lastDividerLocation = pane.getDividerLocation();
                }
                c.remove(pane);
                c.remove(left);
                c.remove(right);
                c.add(left, BorderLayout.CENTER);
                c.validate();
                c.repaint();
            }
        });
        JButton showright = new JButton("Right");
        showright.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                Container c = frame.getContentPane();
                if (pane.isShowing()) {
                    lastDividerLocation = pane.getDividerLocation();
                }
                c.remove(pane);
                c.remove(left);
                c.remove(right);
                c.add(right, BorderLayout.CENTER);
                c.validate();
                c.repaint();
            }
        });
        JButton showboth = new JButton("Both");
        showboth.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                Container c = frame.getContentPane();
                c.remove(pane);
                c.remove(left);
                c.remove(right);
                pane.setLeftComponent(left);
                pane.setRightComponent(right);
                c.add(pane, BorderLayout.CENTER);
                if (lastDividerLocation >= 0) {
                    pane.setDividerLocation(lastDividerLocation);
                }
                c.validate();
                c.repaint();
            }
        });

        JPanel buttons = new JPanel();
        buttons.setLayout(new GridBagLayout());
        buttons.add(showleft);
        buttons.add(showright);
        buttons.add(showboth);
        frame.getContentPane().add(buttons, BorderLayout.NORTH);

        pane.setPreferredSize(new Dimension(400, 300));
        frame.getContentPane().add(pane, BorderLayout.CENTER);
        frame.pack();
        pane.setDividerLocation(0.5);
        return frame;
    }
}

由于 Sunil kumar Sahoo

Answer 1

或者，由于分隔符是容器，您可以执行以下操作：

dividerContainer = (BasicSplitPaneDivider) splitPane.getComponent(2);
Component leftBtn = dividerContainer.getComponent(0);
Component rightBtn = dividerContainer.getComponent(1);
dividerContainer.setBackground(Color.white);
dividerContainer.setBorder(BorderFactory.createEmptyBorder(0, 4, 0, 4));
dividerContainer.setLayout(new FlowLayout(FlowLayout.CENTER, 0, 0));
dividerContainer.add(toolbar);
dividerContainer.setDividerSize(toolbar.getPreferredSize().height);

Answer 2

此代码适用于我：

splitPane.setUI(new BasicSplitPaneUI() {
        public BasicSplitPaneDivider createDefaultDivider() {
        return new BasicSplitPaneDivider(this) {
            public void setBorder(Border b) {
            }

            @Override
                public void paint(Graphics g) {
                g.setColor(Color.GREEN);
                g.fillRect(0, 0, getSize().width, getSize().height);
                    super.paint(g);
                }
        };
        }
    });
    splitPane.setBorder(null);

您可以更改分隔线颜色“g.setColor（new Color（R，G，B））”。

Answer 3

这对我很有用。首先，您使用colspan，<table style='width:100%'> <tr> <th><input type='text' name='name' required placeholder='Name' /> <th> <th><input type='text' name='email' required placeholder='Email' /></th> </tr> <tr> <th><input type='text' name='mobile' required placeholder='Mobile'/> <th> <th><input type='text' name='subject' required placeholder='subject' /></th> </tr> <tr> <th colspan='2'> <textarea></textarea></th> </tr> </table>，setDefaultCloseOperation()等常规方法创建JFrame。然后从类中创建一个对象，然后使用它来调用程序中的所有其他方法，在这种情况下，我创建了一个名为app的对象。您必须记住的一件事是不要忘记使用setBounds()。

颜色更改必须与getContentPane()功能一起使用，同时从ActionListener e获取颜色更改的值。

setBackground()

如何在JSplitPane中将BackGround颜色设置为分隔符

3 个答案: