如上所示，监听鼠标事件 只要使用MouseAdapter类就行了
public class BtnText1 extends JFrame implements MouseMotionListener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
import java.awt.BorderLayoutimport java.awt.Button
import java.awt.CardLayout
import java.awt.FlowLayout
import java.awt.Frame
import java.awt.Panel
import java.awt.event.ActionEvent
import java.awt.event.ActionListener
import java.awt.event.WindowAdapter
import java.awt.event.WindowEvent
public class MyTestawt_1 extends Frame {//implements MouseListener {
//定义按钮以及面板布局
private Button b1 = new Button("第一页")
private Button b2 = new Button("第二页")
private Button b3 = new Button("第三页")
private Panel p2 = new Panel()
private Panel p1 = new Panel()
private CardLayout cl = new CardLayout()
//构造方法
public MyTestawt_1(String str){
super(str)
init()
}
//定义初始化方法
public void init(){
//设置属性
setSize(400, 300)
setLayout(new BorderLayout())
//设置上方的控制按钮
add(BorderLayout.NORTH,p1)
p1.setLayout(new FlowLayout())
p1.add(b1)
p1.add(b2)
p1.add(b3)
add(BorderLayout.CENTER,p2)
p2.setLayout(cl)
p2.add("第一页",new Button("第一页的内容"))
p2.add("第二页",new Button("第二页的内容"))
p2.add("第三页",new Button("第三页的内容"))
//设置可见
setVisible(true)
//实现窗口关闭功能
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we){
setVisible(false)
dispose()
System.out.println("执行到此3")
System.exit(0)
}
})
b1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
System.out.println("执行到此1")
cl.first(p2)
System.out.println("执行到此2")
}
})
b2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
cl.first(p2)
cl.next(p2)
}
})
b3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
cl.last(p2)
}
})
}
public static void main(String[] args) {
//程序入口
new MyTestawt_1("网格型布局")
}
}
