java绘图

Posted 2022-10-29 manog-sg

package test01;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;

import javax.swing.JFrame;
import javax.swing.JPanel;
public class day2 extends JFrame
 public day2()
  super();
  initialize();
                                          //调用初始化方法
 
 private void initialize()
  this.setSize(900,900);                //设置窗体大小
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //设置窗体关闭模式
  add(new CanvasPanel());//设置窗体面板为 绘画面板对象
  this.setTitle("Halloworld");//窗体标题
 
 public static void main(String[] args)
  new day2().setVisible(true);
 
 class CanvasPanel extends JPanel
  public void paint(Graphics g)
   super.paint(g);
   Graphics2D g2=(Graphics2D)g;
   Shape[] shapes=new Shape[4];//声明图形数组
   shapes[0]=new Ellipse2D.Double(5,5,100,100);// 创建圆型对象
   shapes[1]=new Rectangle2D.Double(110,5,100,100);//创建矩形对象
   
   shapes[2]=new Rectangle2D.Double(15,15,80,80);// 创建圆型对象
   shapes[3]=new Ellipse2D.Double(120,15,80,80);//创建矩形对象
   for(Shape shape:shapes)
    Rectangle2D bounds=shape.getBounds2D();
    if(bounds.getWidth()==80)
     g2.fill(shape);// 填充图形
    else
     g2.draw(shape);//绘制图形