Java 鼠标进入按钮时的jLabel幻灯片显示
我无法让它工作:Java 鼠标进入按钮时的jLabel幻灯片显示,java,multithreading,swing,slideshow,thread-sleep,Java,Multithreading,Swing,Slideshow,Thread Sleep,我无法让它工作: public void ru() throws InterruptedException { jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/room.jpg"))); setVisible(true); Thread.sleep(400); jLabel3.setIcon(new javax.swing.ImageIcon(getClass().get
public void ru() throws InterruptedException {
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/room.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/ROOMS.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/background.jpg")));
setVisible(true);
}
private void BtnRoomsMouseEntered(java.awt.event.MouseEvent evt) {
try {
ru();
} catch (InterruptedException ex) {
}
}
有什么解决办法吗?
我想要一个jLabel在鼠标进入某个按钮时显示幻灯片,并且只要鼠标仍在按钮中,它就会保持这种状态。如果鼠标恰好退出按钮,jlabel将返回到空状态。(没有更多的东西)这可能吗?请帮忙。我也试着使用
for
语句,但效果不佳。顺便说一下,我正在使用netbeans。您想在JLabel
中添加一个MouseAdapter
,并使用其mouseenterned()
和mouseExited()
如下:
jLabel3.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(java.awt.event.MouseEvent evt) {
try {
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/room.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/ROOMS.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/background.jpg")));
setVisible(true);
} catch(InterruptedException e) {
}
@Override
public void mouseExited(java.awt.event.MouseEvent evt) {
//whatever you mean by "null state"
}
});
您希望将一个
MouseAdapter
添加到JLabel
中,并使用其mouseenterned()
和mouseExited()
,如下所示:
jLabel3.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(java.awt.event.MouseEvent evt) {
try {
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/room.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/ROOMS.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/background.jpg")));
setVisible(true);
} catch(InterruptedException e) {
}
@Override
public void mouseExited(java.awt.event.MouseEvent evt) {
//whatever you mean by "null state"
}
});
您希望将一个
MouseAdapter
添加到JLabel
中,并使用其mouseenterned()
和mouseExited()
,如下所示:
jLabel3.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(java.awt.event.MouseEvent evt) {
try {
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/room.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/ROOMS.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/background.jpg")));
setVisible(true);
} catch(InterruptedException e) {
}
@Override
public void mouseExited(java.awt.event.MouseEvent evt) {
//whatever you mean by "null state"
}
});
您希望将一个
MouseAdapter
添加到JLabel
中,并使用其mouseenterned()
和mouseExited()
,如下所示:
jLabel3.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(java.awt.event.MouseEvent evt) {
try {
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/room.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/ROOMS.jpg")));
setVisible(true);
Thread.sleep(400);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/adv/background.jpg")));
setVisible(true);
} catch(InterruptedException e) {
}
@Override
public void mouseExited(java.awt.event.MouseEvent evt) {
//whatever you mean by "null state"
}
});
首先需要实现一个
javax.swing.Timer
。尝试调用Thread.sleep()
将阻止该进程。看见这是基本结构
Timer(int delay, ActionListener listener)
其中,delay
是您希望延迟的时间,以毫秒为单位,侦听器将侦听每隔delay
毫秒触发的计时器
事件
所以你想要这样的东西
public class MyFrame extends javax.swing.JFrame {
private Timer timer = null;
ImageIcon[] icons = new ImageIcon[3];
int index = -1;
public MyFrame() {
initComponents();
icons[0] = new ImageIcon(...);
icons[1] = new ImageIcon(...);
icons[2] = new ImageIcon(...);
timer = new Timer(2000, new ActionListener(){
public void actionPerformed(ActionEvent e) {
if (index + 1 > 2) {
index = 0;
jLabel3.setIcon(icons[index]);
} else {
index++;
jLabel3.setIcon(icons[index]);
}
}
});
}
}
对于按钮,您需要使用mouseEntered
和mouseExited
,然后只需调用timer.start()
或timer.stop()
如果您不知道如何添加鼠标侦听器
,只需在设计视图中右键单击按钮,然后选择事件->鼠标->鼠标设置
。对已退出的鼠标执行相同操作。您应该会看到上面自动生成的方法
更新
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.GroupLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.Timer;
import javax.swing.WindowConstants;
public class ImageViewer extends javax.swing.JFrame {
private Timer timer = null;
ImageIcon[] icons = new ImageIcon[5];
int index = -1;
public ImageViewer() {
initComponents();
try {
icons[0] = new ImageIcon(new URL("http://www.iconsdb.com/icons/preview/orange/stackoverflow-4-xxl.png"));
icons[1] = new ImageIcon(new URL("http://www.iconsdb.com/icons/preview/caribbean-blue/stackoverflow-4-xxl.png"));
icons[2] = new ImageIcon(new URL("http://www.iconsdb.com/icons/preview/royal-blue/stackoverflow-4-xxl.png"));
icons[3] = new ImageIcon(new URL("http://www.iconsdb.com/icons/preview/moth-green/stackoverflow-4-xxl.png"));
icons[4] = new ImageIcon(new URL("http://www.iconsdb.com/icons/preview/soylent-red/stackoverflow-4-xxl.png"));
} catch (MalformedURLException ex) {
Logger.getLogger(ImageViewer.class.getName()).log(Level.SEVERE, null, ex);
}
timer = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (index + 1 > 4) {
index = 0;
jLabel1.setIcon(icons[index]);
} else {
index++;
jLabel1.setIcon(icons[index]);
}
}
});
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new JButton();
jLabel1 = new JLabel();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("jButton1");
jButton1.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent evt) {
jButton1MouseEntered(evt);
}
public void mouseExited(MouseEvent evt) {
jButton1MouseExited(evt);
}
});
GroupLayout layout = new GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton1)
.addGap(127, 127, 127))
.addGroup(layout.createSequentialGroup()
.addGap(27, 27, 27)
.addComponent(jLabel1, GroupLayout.PREFERRED_SIZE, 285, GroupLayout.PREFERRED_SIZE)
.addContainerGap(29, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(22, 22, 22)
.addComponent(jLabel1, GroupLayout.DEFAULT_SIZE, 321, Short.MAX_VALUE)
.addGap(18, 18, 18)
.addComponent(jButton1)
.addGap(16, 16, 16))
);
pack();
}// </editor-fold>
private void jButton1MouseEntered(MouseEvent evt) {
timer.start();
}
private void jButton1MouseExited(MouseEvent evt) {
timer.stop();
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(ImageViewer.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(ImageViewer.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(ImageViewer.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(ImageViewer.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new ImageViewer().setVisible(true);
}
});
}
// Variables declaration - do not modify
private JButton jButton1;
private JLabel jLabel1;
// End of variables declaration
}
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java.awt.event.MouseAdapter;
导入java.awt.event.MouseEvent;
导入java.net.MalformedURLException;
导入java.net.URL;
导入java.util.logging.Level;
导入java.util.logging.Logger;
导入javax.swing.GroupLayout;
导入javax.swing.ImageIcon;
导入javax.swing.JButton;
导入javax.swing.JLabel;
导入javax.swing.Timer;
导入javax.swing.WindowConstants;
公共类ImageViewer扩展了javax.swing.JFrame{
专用定时器=空;
ImageIcon[]图标=新的ImageIcon[5];
int指数=-1;
公共图像查看器(){
初始化组件();
试一试{
图标[0]=新图像图标(新URL(“http://www.iconsdb.com/icons/preview/orange/stackoverflow-4-xxl.png"));
图标[1]=新图像图标(新URL(“http://www.iconsdb.com/icons/preview/caribbean-blue/stackoverflow-4-xxl.png"));
图标[2]=新图像图标(新URL(“http://www.iconsdb.com/icons/preview/royal-blue/stackoverflow-4-xxl.png"));
图标[3]=新图像图标(新URL(“http://www.iconsdb.com/icons/preview/moth-green/stackoverflow-4-xxl.png"));
图标[4]=新图像图标(新URL(“http://www.iconsdb.com/icons/preview/soylent-red/stackoverflow-4-xxl.png"));
}捕获(格式错误){
Logger.getLogger(ImageViewer.class.getName()).log(Level.SEVERE,null,ex);
}
计时器=新计时器(1000,新ActionListener(){
已执行的公共无效操作(操作事件e){
如果(索引+1>4){
指数=0;
jLabel1.setIcon(图标[索引]);
}否则{
索引++;
jLabel1.setIcon(图标[索引]);
}
}
});
}
/**
*从构造函数中调用此方法来初始化表单。
*警告:不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告(“未选中”)
//
私有组件(){
jButton1=新JButton();
jLabel1=新的JLabel();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setText(“jButton1”);
jButton1.addMouseListener(新的MouseAdapter(){
公共无效mouseenterned(MouseEvent evt){
JButton1Mouseintered(evt);
}
公共无效mouseExited(MouseEvent evt){
jButton1MouseExited(evt);
}
});
GroupLayout=newgrouplayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addContainerGap(GroupLayout.DEFAULT\u大小,简称.MAX\u值)
.addComponent(jButton1)
.addGap(127、127、127))
.addGroup(layout.createSequentialGroup()
.addGap(27,27,27)
.addComponent(jLabel1,GroupLayout.PREFERRED\u大小,285,GroupLayout.PREFERRED\u大小)
.addContainerGap(29,简称最大值))
);
layout.setVerticalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addGap(22,22,22)
.addComponent(jLabel1,GroupLayout.DEFAULT\u SIZE,321,Short.MAX\u值)
.addGap(18,18,18)
.addComponent(jButton1)
.addGap(16,16,16))
);
包装();
}//
私有void jbutton1mouseintered(MouseEvent evt){
timer.start();
}
私有void jButton1MouseExited(MouseEven