JAVA：模拟心电图

原文地址：JAVA：模拟心电图

package koko;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.util.List;
import java.util.LinkedList;

/**
*

Title: JAVA

*
*

Description: Pengcheng

*
*

Copyright: Copyright (c) 2007

*
*

Company:

*
* @author shmily
* @version 1.0
*/
public class Heart extends JFrame {
protected static final int WIDTH = 800;
protected static final int HEIGHT = 500;
public Heart(String title) {
super(title);
this.setSize(WIDTH, HEIGHT);
this.setLocation((dimension.width - WIDTH) / 2,
(dimension.height - HEIGHT) / 2);
this.add(panel);
}

private java.awt.Dimension dimension = java.awt.Toolkit.getDefaultToolkit().                                       getScreenSize();Mypanel panel = new Mypanel();//Timer事件public javax.swing.Timer timer = new javax.swing.Timer(20,        new java.awt.event.ActionListener() {    public void actionPerformed(ActionEvent e) {        panel.repaint(); //重画面板    }});public static void main(String[] args) {    Heart hart = new Heart("模拟心电图");    hart.setVisible(true);    hart.timer.start();    hart.setDefaultCloseOperation(hart.EXIT_ON_CLOSE);}

}

//绘制画图面版
class Mypanel extends javax.swing.JPanel {
public Mypanel() {}

private List<Integer> list1 = new LinkedList<Integer>();private List<Integer> list2 = new LinkedList<Integer>();private final int XPOINT = 100;private final int YPOINT = 400;private final int TEP = 5; //像素的位移量private int num = 0;private final int YY = 200; //产生随机数的范围public void paintComponent(Graphics g) {    g.clearRect(0, 0, Heart.WIDTH, Heart.HEIGHT);    super.paintComponent(g);    g.setColor(Color.BLUE);    //画X轴    g.drawLine(this.XPOINT, Heart.HEIGHT - this.XPOINT, this.XPOINT,               this.XPOINT);    //画Y轴    g.drawLine(this.XPOINT, Heart.HEIGHT - this.XPOINT,               Heart.WIDTH - this.XPOINT, Heart.HEIGHT - this.XPOINT);    //标题    g.drawString("模拟心电图", (Heart.WIDTH - 2 * (this.XPOINT)) / 2 + 50,                 this.XPOINT - 50);    //画X轴和Y轴的箭头    int[] X = {this.XPOINT - 6, this.XPOINT, this.XPOINT + 6};    int[] Y = {this.XPOINT + 8, this.XPOINT, this.XPOINT + 8};    g.drawPolyline(X, Y, 3);    int[] X1 = {Heart.WIDTH - this.XPOINT - 8, Heart.WIDTH - this.XPOINT,               Heart.WIDTH - this.XPOINT - 8};    int[] Y1 = {Heart.HEIGHT - this.XPOINT - 6, Heart.HEIGHT - this.XPOINT,               Heart.HEIGHT - this.XPOINT + 6};    g.drawPolyline(X1, Y1, 3);    //设置像素点移动    this.list1.add(this.num + this.XPOINT);    this.num += this.TEP;    this.list2.add(this.round());    if (this.num > (Heart.WIDTH - 2 * (this.XPOINT))) {        this.list2.remove(0);    }    int[] xx = new int[10000];    int[] yy = new int[1000];    int j = 0;    //把链表中的元素导入数组    for (Integer elem : (this.list1)) {        xx[j++] = elem.intValue();        if(j>(Heart.WIDTH - 2 * (this.XPOINT)))break;    }    int i = 0;    for (Integer elem : this.list2) {        yy[i++] = elem.intValue();    }    g.setColor(Color.RED);    //绘制图形    g.drawPolyline(xx, yy, list2.size());}//生成随机数并控制图形在坐标中的位置public int round() {    return ((int) (Math.random() * this.YY) + Heart.HEIGHT -            3 * this.XPOINT - 20);}

}