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我用mouseEnter和mouseExit修复了它。我添加了鼠标适配器和鼠标监听器来修复它。我这样做是为了当鼠标进入时它是红色的，当它离开时它是黑色的。如果我使按钮不可见并制作我自己的自定义按钮，这仍然有效吗？我还能保留播放文字吗？

我的代码：

package Main;

import java.awt.Color;
import java.awt.Font;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;


public class Game extends JPanel {
public Game() {
    JFrame frame = new JFrame("Tennis Game");

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLayout(null);

    final JButton b = new JButton("Play");

    b.setBackground(new Color(220,220,220));
    b.setFocusPainted(false);
    b.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 20));
    b.setBounds(110, 100, 80, 40);
    b.setForeground(Color.BLACK);

    b.addMouseListener(new java.awt.event.MouseAdapter(){

        public void mouseEntered(java.awt.event.MouseEvent evt) {
            b.setForeground(Color.RED);
        }

        public void mouseExited(java.awt.event.MouseEvent evt) {
            b.setForeground(Color.BLACK);
        }

    });

    frame.add(b);
    frame.setSize(300,400);
    frame.setVisible(true);

}



public static void main(String[] args) {
     SwingUtilities.invokeLater(new Runnable() {
         @Override
         public void run() {
             new Game();
         }
     });
 }

 }

谢谢！

Answer 1

您需要使用mouseEnter中的mouseExit和MouseListener个事件;
你不应该，如果你的尝试，你将无可救药; Swing API是围绕使用布局管理器而设计的，试图在没有它们的情况下，将导致您重新发明轮子以解决您遇到的所有问题。
您将停用当前的边框画（setBorderPainted），然后应用自己的边框，例如LineBorder

首先查看How to use Mouse Listeners和How to us Borders了解更多详情......

使用mouseEnter我试了但是当我这样做时它不起作用。

首先，阅读教程How to use Mouse Listeners

import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            setLayout(new GridBagLayout());
            JButton btn = new JButton("play");
            add(btn);

            btn.addMouseListener(new MouseAdapter() {

                @Override
                public void mouseEntered(MouseEvent e) {
                    btn.setText(btn.getText().toUpperCase());
                }

                @Override
                public void mouseExited(MouseEvent e) {
                    btn.setText(btn.getText().toLowerCase());
                }

            });
        }

    }

}

但我同意AndrewThompson，你最好使用“普通”图标和“翻转”图标......

enter image description here

import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            setLayout(new GridBagLayout());
            JButton btn = new JButton();
            add(btn);

            try {
                btn.setIcon(new ImageIcon(
                                ImageIO.read(getClass().getResource("/Play-Plain.png"))
                ));
                btn.setRolloverIcon(new ImageIcon(
                                ImageIO.read(getClass().getResource("/Play-RollOver.png"))
                ));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

}

如何添加JButton鼠标位置？

1 个答案: