mousepointer.java

java练习程序

//根据鼠标的位置设置鼠标的形状
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class MousePointer extends Applet implements MouseListener
{ 
	double x, y;
	public void init()
	{
		x=-1;y=-1;
		addMouseListener(this);
	}
	
	public void mousePressed(MouseEvent e)
	{
		x=e.getX();y=e.getY();
		if(0<=x&&x<=150&&0<=y&&y<=150)
		{
			setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
		}
	}
	
	public void mouseReleased(MouseEvent e)
	{
		x=e.getX();y=e.getY();
		if(!(0<=x&&x<=150&&0<=y&&y<=150))
		{
			setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
		}
	}
	
	public void mouseEntered(MouseEvent e)
	{
		setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
	}
	
	public void mouseExited(MouseEvent e)
	{}
	public void mouseClicked(MouseEvent e)
	{}
}