import javax.swing.*; import java.awt.event.*; import java.awt.*; import java.awt.event.*;public class Test2 extends JApplet { boolean flag = false; int x = 20; int y = 20; int x1=0,y1=-100;
Container panel; public void init() { panel = getContentPane(); panel.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent e) { flag = true; //x = e.getX(); //y = e.getY(); } public void mouseReleased(MouseEvent e) { x1=x; y1=y; x = e.getX(); y = e.getY(); flag = false; repaint(); } }); //end addListener
panel.addMouseMotionListener(new MouseMotionAdapter() { public void mouseDragged(MouseEvent ee) { if (flag) { x1=x; y1=y; x = ee.getX(); y = ee.getY(); repaint(); } // end if } }); } // end init()
public void paint(Graphics g) { g.setXORMode(getBackground()); g.drawString("鼠标拖哪儿,我就去哪儿!!!", x1, y1); g.drawString("鼠标拖哪儿,我就去哪儿!!!", x, y); } // end paint }
import javax.swing.*; import java.awt.event.*; import java.awt.*;public class Test3 extends JApplet { boolean flag = false; int x = 20; int y = 20; int width; int height; Color fgcolor, bgcolor ; Image offScreen; Graphics tempGrapthics; Container panel; public void init() { width = getSize().width ; height = getSize().height ; offScreen = createImage(width, height) ; fgcolor=Color.black; bgcolor=Color.white; panel = getContentPane(); panel.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent e) { flag = true; } public void mouseReleased(MouseEvent e) { x = e.getX(); y = e.getY(); flag = false; repaint(); } }); //end addListener
panel.addMouseMotionListener(new MouseMotionAdapter() { public void mouseDragged(MouseEvent ee) { if (flag) {
x = ee.getX(); y = ee.getY(); repaint(); } // end if } }); } // end init() private void paintText(Graphics g) {
看看这个帖子你会明白的
import java.awt.event.*;
import java.awt.*;
import java.awt.event.*;public class Test2 extends JApplet {
boolean flag = false;
int x = 20;
int y = 20;
int x1=0,y1=-100;
Container panel;
public void init() {
panel = getContentPane();
panel.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
flag = true;
//x = e.getX();
//y = e.getY();
}
public void mouseReleased(MouseEvent e) {
x1=x;
y1=y;
x = e.getX();
y = e.getY();
flag = false;
repaint();
}
}); //end addListener
panel.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent ee) {
if (flag) {
x1=x;
y1=y;
x = ee.getX();
y = ee.getY();
repaint();
} // end if
}
});
} // end init()
public void paint(Graphics g) {
g.setXORMode(getBackground());
g.drawString("鼠标拖哪儿,我就去哪儿!!!", x1, y1);
g.drawString("鼠标拖哪儿,我就去哪儿!!!", x, y);
} // end paint
}
import java.awt.event.*;
import java.awt.*;public class Test3 extends JApplet {
boolean flag = false;
int x = 20;
int y = 20;
int width;
int height;
Color fgcolor, bgcolor ;
Image offScreen;
Graphics tempGrapthics;
Container panel;
public void init() {
width = getSize().width ;
height = getSize().height ;
offScreen = createImage(width, height) ;
fgcolor=Color.black;
bgcolor=Color.white;
panel = getContentPane();
panel.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
flag = true;
}
public void mouseReleased(MouseEvent e) {
x = e.getX();
y = e.getY();
flag = false;
repaint();
}
}); //end addListener
panel.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent ee) {
if (flag) {
x = ee.getX();
y = ee.getY();
repaint();
} // end if
}
});
} // end init()
private void paintText(Graphics g)
{
g.setColor(bgcolor) ;
g.fillRect(0, 0, width, height) ;
g.clipRect(0, 0, width, height) ;
g.setColor(fgcolor) ;
g.drawString("鼠标拖哪儿,我就去哪儿!!!", x, y);
}
public void paint(Graphics g) {
paintText(offScreen.getGraphics());
g.drawImage(offScreen, 0, 0, null) ;
} // end paint
}