show_1.java~1~

本程序用JAVA编制

package curve;

import java.awt.*;
import javax.swing.JFrame;
import java.util.*;
import java.awt.event.*;

public class Show_1 extends Canvas {
  Image bufferImage;  // 缓冲图像
  Graphics bufferGC;  // 图形设备环境
  curve c;            // 曲线对象
  int graphWidth;     // 图形区域的宽度
  int graphHeight;    // 图形区域的高度
  Vector v;           // 统计数据矢量
  Dimension d = new Dimension(500,400);

  // 绘制图像的内容
  public void paint(Graphics g){
    graphHeight=d.height-50;
    graphWidth =d.width-60;

    bufferImage=createImage(graphWidth,graphHeight); // 创建图形的绘制环境
    bufferGC=bufferImage.getGraphics();
    c=new curve(bufferGC);             // 与绘制环境相关的曲线对象
    //paintCurve("t","title");
    c.drawAxes(graphWidth,graphHeight);
    c.makeHashMarks(5,56);
    g.drawImage(bufferImage,20,5,this);
    g.drawString("nihao",10,30);

  }

  // 使用Curve的方法--画曲线
  public void paintCurve(String name,String title){
    Vector actionVector=new Vector();
    String actionString=new String();

    actionVector=readData(name);
    actionString=readStringData(title);

    int xCount=actionVector.size();
    int ytop=c.getTopY(actionVector);

    c.clearHashMarks();
    c.clearScreen();
    c.getMaxY(actionVector);
    c.drawAxes(graphWidth,graphHeight);
    c.makeHashMarks(xCount-1,ytop); // x轴刻度数
    c.showData(actionVector);
    c.makeTitle(actionString);

    repaint();
  }

  // 读取HTML数据参数到一个矢量对象，s代表程序控制的字符串（用于获取 HTML 的字符串）。
  public Vector readData(String name){
    Vector tempVector=new Vector();
    Float param;
    String tempData=null;
    boolean datapresent=true;
    int i=0;

    while(datapresent){
      try{
        //tempData=getParameter(name+Integer.toString(i+1));
      }catch(Exception e){
        System.out.println(e);
      }
      if (tempData==null){
        datapresent=false;
      }else{
        param=Float.valueOf(tempData);
        tempVector.addElement(param);
        i+=1;
      }
    }
    return tempVector;
  }

  // 读取HTML字符串数据（包含相关数据的简要描述）
  public String readStringData(String title){
    String tempString = null;
    try{
      //tempString=getParameter(title);
    }catch(Exception e){
      System.out.println(e);
    }
    return tempString;
  }


    public static void main(String[] args) {
        Show_1 show = new Show_1();
        Frame f=new Frame("testing curve");
        //c.addKeyListener(c);
        f.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){System.exit(0);}
            });
        f.setLayout(new BorderLayout());
        f.add(show,"Center");
        f.setSize(500,400);
        f.setVisible(true);
      }
  }