设计一个窗口,上面有一个按纽。当鼠标移动到按纽上时,立即隐藏该按纽;当离开按纽时,显示该按纽。
下面的代码是我自己做的,第三行有个问题,我不知该如何解决,请高手指点!import java.awt.*;
import java.awt.event.*;
public class Frame2 extends Frame implements MouseListener
{
static Button b1;
public Frame2(String title)
{
super(title);
b1=new Button("click me!");
b1.setSize(30,30);
b1.setLocation(100,100);
b1.addMouseListener(new MyActionListener());
}
public static void main(String args[])
{
Frame2 fram=new Frame2("odd_button");
fram.setLayout(null);
fram.setResizable(true);
fram.setLocation(100,100);
fram.setSize(400,400);
fram.setVisible(true);
}
class MyActionListener implements MouseListener
{
public void mouseEntered(MouseEvent e)
{
b1.setVisible(false);
}
public void mouseExited(MouseEvent e)
{
b1.setVisible(true);
}
public void mousePressed(MouseEvent e)
{ }
public void mouseReleased(MouseEvent e)
{ }
public void mouseClicked(MouseEvent e)
{
}
}}
下面的代码是我自己做的,第三行有个问题,我不知该如何解决,请高手指点!import java.awt.*;
import java.awt.event.*;
public class Frame2 extends Frame implements MouseListener
{
static Button b1;
public Frame2(String title)
{
super(title);
b1=new Button("click me!");
b1.setSize(30,30);
b1.setLocation(100,100);
b1.addMouseListener(new MyActionListener());
}
public static void main(String args[])
{
Frame2 fram=new Frame2("odd_button");
fram.setLayout(null);
fram.setResizable(true);
fram.setLocation(100,100);
fram.setSize(400,400);
fram.setVisible(true);
}
class MyActionListener implements MouseListener
{
public void mouseEntered(MouseEvent e)
{
b1.setVisible(false);
}
public void mouseExited(MouseEvent e)
{
b1.setVisible(true);
}
public void mousePressed(MouseEvent e)
{ }
public void mouseReleased(MouseEvent e)
{ }
public void mouseClicked(MouseEvent e)
{
}
}}
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Frame2 extends JFrame
{
private final JButton b1;
public Frame2(String title)
{
super(title);
b1=new JButton("click me!");
b1.setSize(30,30);
b1.setLocation(100,100);
b1.addMouseListener(new MyActionListener());
this.getContentPane().setLayout(new FlowLayout());
this.getContentPane().add(b1);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String args[])
{
Frame2 fram=new Frame2("odd_button"); fram.setResizable(true);
fram.setLocation(100,100);
fram.setSize(400,400);
fram.setVisible(true);
}
class MyActionListener implements MouseListener
{
public void mouseEntered(MouseEvent e)
{
b1.setVisible(false);
}
public void mouseExited(MouseEvent e)
{
b1.setVisible(true);
}
public void mousePressed(MouseEvent e)
{ }
public void mouseReleased(MouseEvent e)
{ }
public void mouseClicked(MouseEvent e)
{
}
}}