aw3 - 経済統計練習帳

package color;
 
 
public class pro {
 
 int datanumber;
 double[] x=new double[100];
 
 
    public static void main(String[] args) {
        pro r=new pro();
    }
    pro(){
 
 
 
datanumber=5;
 
x[1]=100;
x[2]=200;
x[3]=50;
x[4]=300;
x[5]=20;
 
 
graph sub=new graph();
sub.datanumber=datanumber;
sub.x=x;
sub.makedata("ren.jpg");
 
 
 
    }
 
 
}
 
package color;
 
 
import java.awt.*; 
import java.awt.Color;   
import java.awt.image.*;   
import java.awt.image.BufferedImage;   
import java.io.*;   
import javax.imageio.ImageIO;   
import java.awt.Polygon;
 
 
public class graph {
 
 int datanumber;
 double[] x=new double[100];
 
 
 
    void makedata(String file){
 
BufferedImage off = new BufferedImage(500, 500, BufferedImage.TYPE_INT_BGR);   
Graphics offsc = off.getGraphics();  
 
 
int s;
double minx,maxx;
minx=10000;
maxx=0;
for(s=1;s<datanumber+1;s++){
if(x[s]>maxx)maxx=x[s];
if(x[s]<minx)minx=x[s];
}
 
String str1=""+maxx;
String str2=""+minx;
 
 
int delta=400/datanumber;
 
 
offsc.setColor(Color.white);
offsc.fillRect(0,0,500,500);
 
offsc.setColor(Color.black);
 
offsc.drawLine(50,450,50,50);
offsc.drawLine(50,450,450,450);
 
offsc.drawString(str1,50,50);
offsc.drawString(str2,50,450);
 
for(s=1;s<datanumber;s++){
int y1=(int)(400*(x[s]-minx)/(maxx-minx));
int y2=(int)(400*(x[s+1]-minx)/(maxx-minx));
offsc.drawLine(delta*(s-1)+50,450-y1,delta*s+50,450-y2);
}
 
 
 
 
 
offsc.dispose(); 
 
try { 
ImageIO.write(off, "jpeg", new File(file)); 
} catch (IOException exception) { exception.printStackTrace(); }     
}   
 
 
 
    }