Java 鼠标监听事件 mouseMoved(MouseEvent)

public class BtnText1 extends  JFrame implements MouseMotionListener

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不需要实现MouseMotionListener接口，你已经用了addMouseMotionListener方法

MouseAdapter类已经是实现了MouseMotionListener接口的。

改成

public class BtnText1 extends  JFrame

可以运行成功

java 鼠标监听

//这是应用程序，跟java小程序的大体思路还是差不多的，你改改

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.border.Border;

/**

*建立个界面，可以加载本机中图片。

*加载后可以通过鼠标点击获得图片上任意点坐标。

*/

public class MyPicture extends JFrame implements MouseListener{

private JLabel tipLabel;

/**

*main()

*/

public static void main(String[] args){

MyPicture frame = new MyPicture();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

/**

*constructor

*/

public MyPicture(){

setSize(800, 600);//根据要求调整大小

setLocation(100,100);

setTitle("获得图片上任意点坐标");

setResizable(false);

Container con=getContentPane();

ImageIcon bgIcon=new ImageIcon("bgpic.jpg");//注意图片的路径

ImagePanel backpicPanel=new ImagePanel(bgIcon);

backpicPanel.addMouseListener(this);

con.add(backpicPanel,BorderLayout.CENTER);

tipLabel=new JLabel("--------------------提示：坐标依次打印在屏幕上!--------------------");

con.add(tipLabel,BorderLayout.NORTH);

}

/**

*

*/

public void mousePressed(MouseEvent e){

int x=e.getX();

int y=e.getY();

String message="("+x+","+y+")";

tipLabel.setText(message);

System.out.println(message);

}

public void mouseReleased(MouseEvent e){

}

public void mouseEntered(MouseEvent e){

}

public void mouseExited(MouseEvent e){

}

public void mouseClicked(MouseEvent e){

}

}

/**

*类ImagePanel，用于添加背景图片

*/

class ImagePanel extends JPanel{

private Image img;

public ImagePanel (ImageIcon imageIcon){

img=imageIcon.getImage();

}

public void paintComponent(Graphics g){

super.paintComponent(g);

g.drawImage(img,0,0,this);

}

}

java中鼠标监听器的使用

import java.util.Date;

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

public class MyTime extends JFrame {//删除了集成的接口

JFrame frame = new JFrame();

JLabel label = null;

JPanel panel1 = new JPanel();

JPanel panel2 = new JPanel();

JButton btn1 = new JButton(" 红 色 ");

JButton btn2 = new JButton(" 绿 色 ");

JButton btn3 = new JButton(" 蓝 色 ");

public MyTime() {

panel1.setBackground(Color.white);

panel2.setLayout(new FlowLayout(FlowLayout.CENTER, 20, 10));

panel1.setBackground(Color.WHITE);

panel2.add(btn1);

panel2.add(btn2);

panel2.add(btn3);

add(panel1, BorderLayout.CENTER);

add(panel2, BorderLayout.SOUTH);// 创建一个监听器对象

btn1.addActionListener(new TimeThread(this).new AL()); // 为按钮注册监听器（使用了TimeThread类的AL内部类）

btn2.addActionListener(new TimeThread(this).new AL());

btn3.addActionListener(new TimeThread(this).new AL());

frame = new JFrame();

label = new JLabel();

label.setIcon(new ImageIcon("QQ拼音截图未命名.jpg"));

label.setFont(new Font("幼圆", Font.LAYOUT_NO_LIMIT_CONTEXT, 76));

label.setForeground(Color.BLACK);

add(label);

setTitle("个性数字时钟");

setResizable(false);// 锁定窗口大小

setSize(320, 160);

setLocation(300, 300);

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public static void main(String[] args) {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (Exception e) {

}

MyTime mt = new MyTime();

new TimeThread(mt).start();

}

}

class TimeThread extends Thread {

private MyTime mt;

public TimeThread(MyTime mt) {

this.mt = mt;

}

public void run() {

while (true) {

String fullTime = new Date().toString();

String time = fullTime.substring(11, 19);

mt.label.setText(time);

mt.label.repaint();

try {

sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

class AL implements ActionListener { // 内部类

public void actionPerformed(ActionEvent e) {

if ((JButton) e.getSource() == mt.btn1)//btn1属于MyTime类

mt.label.setForeground(Color.RED);

else if ((JButton) e.getSource() == mt.btn2)

mt.label.setForeground(Color.GREEN);

else if ((JButton) e.getSource() == mt.btn3)

mt.label.setForeground(Color.BLUE);

}

}

}

//修改的地方已经注释

JAVA鼠标监听器问题！高手帮忙啊！

画图不能这样来画的，因为Graphics 不能自己来控制：

DrawLine DW=new DrawLine();

DW.g.setColor(Color.orange);

DW.g.drawLine(orgX, orgY, e.getX(), e.getY());

public void mouseRealeased(MouseEvent e)这个方法你拼错了，应该是：

public void mouseReleased(MouseEvent e)

帮你改了下，实现的功能：安下鼠标不放 -- 移动别处 -- 松开，画图

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.JPanel;

public class DrawLine extends Frame {

static JPanel drawPanel;

static int orgX;

static int orgY;

static int eX;

static int eY;

public static void main(String[] args) {

// TODO 自动生成方法存根

drawPanel = new JPanel() {

@Override

public void paint(Graphics g) {

super.paint(g);

Graphics2D g2D = (Graphics2D) g;

g2D.drawLine(orgX, orgY, eX, eY);

}

};

DrawLine mainFrame = new DrawLine();

mainFrame.setSize(400, 400);

mainFrame.setTitle("画线");

mainFrame.add(drawPanel);

mainFrame.setVisible(true);

mainFrame.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

e.getWindow().dispose();

System.exit(0);

}

});

mainFrame.addMouseListener(new MouseAdapter() {

public void mousePressed(MouseEvent e) {

orgX = e.getX();

orgY = e.getY();

}

public void mouseReleased(MouseEvent e) {

System.out.println("mouseReleased");

eX = e.getX();

eY = e.getY();

drawPanel.repaint();

}

});

}

}

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