import java.awt.*;import javax.swing.*;
import java.awt.event.*;
public class PreviewImage implements MouseListener{
private ImageIcon background;
private Container container;
private JLabel label1;private JFrame frame; public void creat(){
frame=new JFrame();
frame.setTitle("点击进入");
frame.setLayout(new FlowLayout());
container=frame.getContentPane();
background=new ImageIcon("110.jpg");
label1 = new JLabel(background);//把背景图片显示在一个标签里面
label1.addMouseListener(new simpleMouseAdapter()); container.add(label1);
frame.setSize(702, 496);
frame.setLocation(300,100);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }
private class simpleMouseAdapter extends MouseAdapter{
public void mousePressed(MouseEvent e){
new BasicButtons();
frame.setVisible(false);
}
}
public static void main(String[] args) {
PreviewImage demo=new PreviewImage();
demo.creat();
} }现已确定BasicButtons类没有问题 ,程序也能正常运行,但编译器报错:红色代码前出现小红叉,难道鼠标的几个回调方法都要写出来?既然出现小红叉了,为什么却可以正常运行?迷惑ing!
must implements parent's methods
implements MouseListener你已经用simpleMouseAdapter 来实现了
}
public void mouseReleased(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mouseClicked(MouseEvent e) {
}
把此行代码改成public class PreviewImage extends MouseAdapter 就OK啦