用递归画的有意思的图形

来源：互联网发布：淘宝休闲桌椅价格编辑：程序博客网时间：2024/04/30 21:29

import java.awt.Color;import java.awt.FlowLayout;import java.awt.Font;import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;public class Draw extends JFrame implements ActionListener{int deepth=1;public Draw(){//创建窗体this.setSize(1000,700);this.setTitle("风形");this.setLocationRelativeTo(null);this.getContentPane().setBackground(Color.black);this.setDefaultCloseOperation(3);this.setLayout(new FlowLayout());JButton button_add=new JButton("增加深度");JButton button_sub=new JButton("减少深度");this.add(button_add);this.add(button_sub);button_add.addActionListener(this);button_sub.addActionListener(this);this.setVisible(true);//repaint();}//int x1=x/3,y1=y/3;//int x2=x*2/3,y2=y/3;public void paint(Graphics g){super.paint(g);int y=getHeight();int x=getWidth();g.setColor(Color.red);change(g,x/3,y/3,2*x/3,y/3,deepth);Font f=new Font("",Font.ITALIC,30);g.setFont(f);g.drawString("深度="+deepth, 700, 100);}public void change(Graphics g,int x1,int y1,int x2,int y2,int deepth){if(deepth<2){//g.setColor(Color.red);g.drawLine(x1, y1, x2, y2);//System.out.println("x1="+x1+"y1="+y1);}else{int x3 = (x1 + y1 + x2 - y2) / 2;int y3 = (x2 + y2 + y1 - x1) / 2;change(g,x1,y1,x3,y3,deepth-1);change(g,x2,y2,x3,y3,deepth-1);}}@Overridepublic void actionPerformed(ActionEvent e) {String label=e.getActionCommand();if(label.equals("增加深度")){deepth++;}else{deepth--;}repaint();}public static void main(String[] args){new Draw();}}

Draw继承JFrame创建一个窗口

核心是递归方法public void change(Graphics g,int x1,int y1,int x2,int y2,int deepth)

通过深度的控制让电脑作几次递归画图，从而形成好看的图形

每一次增加深度都是在之前图形的基础上添加线条，而且所有线条都是重新绘画

点击打开链接

import java.awt.Color;import java.awt.FlowLayout;import java.awt.Font;import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;public class Draw2 extends JFrame implements ActionListener{int deepth=1;JButton button_add;public Draw2(){setTitle("漂亮不");setSize(1000,800);setLocationRelativeTo(null);setDefaultCloseOperation(3);this.getContentPane().setBackground(Color.black);//设置布局setLayout(new FlowLayout()); button_add=new JButton("增加深度");JButton button_sub=new JButton("减少深度");button_add.setBackground(Color.RED);button_sub.setBackground(Color.RED);add(button_add);add(button_sub);button_add.addActionListener(this);button_sub.addActionListener(this);//设置可见setVisible(true);}public void paint(Graphics g){super.paint(g);int x=getWidth();int y=getHeight();Font f=new Font("",Font.ITALIC,30);g.setFont(f);g.setColor(Color.red);g.drawString("深度="+deepth,800,100);change(g, x/3, y/3, x*2/3, y/3, deepth);}public void change(Graphics g,int x1,int y1,int x2,int y2,int deepth){if(deepth<2){g.drawLine(x1,y1,x2,y2);}else{g.drawLine(x1,y1,x2,y2);int x3 = (x1 + y1 + x2 - y2) / 2;int y3 = (x2 + y2 + y1 - x1) / 2;change(g,x1,y1,x3,y3,deepth-1);change(g,x3,y3,x2,y2,deepth-1);}}@Overridepublic void actionPerformed(ActionEvent e) {//String label=e.getActionCommand();if(e.getSource()==button_add){deepth++;}else{deepth--;}repaint();}public static void main(String []args){new Draw2();}}

这个在重绘的递归绘画的方法里修改了坐标形成高度对称的图形

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