jpanel中加上jbutton的视觉效果 在jpanel中加jbutton,有没有方法让加上去的jbutton在鼠标没放上去时看不出来有jbutton,当鼠标放上去了就有jbutton 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 我帮你编好了,你自己看一下: import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;public class Jbutton_Mouse { public static void main(String[] args) { JFrame frame = new JFrame("鼠标按钮"); JPanel panel=new JPanel(); JButton button = new JButton(); button.addMouseListener(new MouseListener() { public void mouseReleased(MouseEvent e) { } public void mousePressed(MouseEvent e) { } public void mouseExited(MouseEvent e) { System.out.println("out"); } public void mouseEntered(MouseEvent e) { System.out.println("in"); } public void mouseClicked(MouseEvent e) { } }); panel.add(button); frame.add(panel); frame.pack(); frame.setVisible(true); }} 通过MouseMotionListener实现import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Test extends JFrame{ private JPanel center = new JPanel(); private JButton jButton = new JButton("Button"); public Test() { add(center); center.setLayout(new BorderLayout(10, 10)); center.add(jButton); center.add(new JLabel("Label"), BorderLayout.SOUTH); center.add(new JLabel("Label"), BorderLayout.NORTH); center.add(new JLabel("Label"), BorderLayout.WEST); center.add(new JLabel("Label"), BorderLayout.EAST); pack(); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); center.addMouseMotionListener(new MouseAdapter() { public void mouseMoved(MouseEvent e) {//注意,jButton.getBounds()得到的Rectangle和e.getPoint()得到的点都是相对于其父容器center而言的 jButton.setVisible(jButton.getBounds().contains(e.getPoint())); } }); } public static void main(String[] args) { new Test(); }} jfreechart 曲线不显示的问题 swt 中创建的线程不能访问组件。 java jdk的两个超水的问题 【疑惑】JAVA异常处理 关个关于数据备份和还原的问题 封装的三个必要条件 求教各位论坛朋友 散分 关于两个不同公司开发的两个系统分别只支持MS JVM与Sun JVM的问题分析与解决方法的讨论 jcreator的自动缩进不完善,怎么解决? 请教一个jdic的问题 JAVA编译问题 java有必要学习数据结构吗
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Jbutton_Mouse {
public static void main(String[] args) {
JFrame frame = new JFrame("鼠标按钮");
JPanel panel=new JPanel();
JButton button = new JButton();
button.addMouseListener(new MouseListener() {
public void mouseReleased(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
System.out.println("out");
}
public void mouseEntered(MouseEvent e) {
System.out.println("in");
}
public void mouseClicked(MouseEvent e) {
}
});
panel.add(button);
frame.add(panel);
frame.pack();
frame.setVisible(true);
}
}
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class Test extends JFrame
{
private JPanel center = new JPanel();
private JButton jButton = new JButton("Button"); public Test()
{
add(center);
center.setLayout(new BorderLayout(10, 10));
center.add(jButton);
center.add(new JLabel("Label"), BorderLayout.SOUTH);
center.add(new JLabel("Label"), BorderLayout.NORTH);
center.add(new JLabel("Label"), BorderLayout.WEST);
center.add(new JLabel("Label"), BorderLayout.EAST);
pack();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
center.addMouseMotionListener(new MouseAdapter()
{
public void mouseMoved(MouseEvent e)
{//注意,jButton.getBounds()得到的Rectangle和e.getPoint()得到的点都是相对于其父容器center而言的
jButton.setVisible(jButton.getBounds().contains(e.getPoint()));
}
});
}
public static void main(String[] args)
{
new Test();
}
}