?? drawdemo.java
字號:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class DrawPanel extends JPanel
{
public int chx=100,chy=100,xori=100,yori=100;
public DrawPanel()
{
setBackground(Color.WHITE);
addMouseMotionListener(new MouseMotionAdapter()
{
public void mouseMoved(MouseEvent me)
{
xori=chx;
yori=chy;
chx=me.getX();
chy=me.getY();
repaint();
}
}
);
}
public void paint(Graphics g)
{
g.drawLine(0,0,100,100);
g.drawLine(0,100,100,0);
g.setColor(Color.BLUE);
g.drawLine(40,25,250,80);
g.drawLine(75,90,400,400);
g.setColor(Color.GREEN);
g.drawRect(10,10,60,50);
g.drawRect(100,10,60,50);
g.setColor(Color.RED);
g.drawRoundRect(190,10,60,50,15,15);
g.fillArc(100,100,70,90,0,270);
g.setColor(Color.CYAN);
g.fillOval(200,100,160,90);
g.drawLine(150,150,400,40);
g.drawLine(5,290,80,19);
g.setColor(Color.WHITE);
g.drawLine(xori,yori-10,xori,yori+10);
g.drawLine(xori-10,yori,xori+10,yori);
g.setXORMode(Color.BLACK);
g.drawLine(chx,chy-10,chx,chy+10);
g.drawLine(chx-10,chy,chx+10,chy);
g.setPaintMode();
}
}
public class DrawDemo extends JFrame
{
public DrawDemo()
{
Container cp=getContentPane();
setBackground(Color.WHITE);
DrawPanel dp=new DrawPanel();
cp.setLayout(new BorderLayout());
cp.add(dp,BorderLayout.CENTER);
setSize(400,250);
show();
}
public static void main(String args[])
{
new DrawDemo();
}
}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -