鉄道ｐ - 経済統計練習帳

package line;
 
import java.io.*;
 
public class pro {
 
 
          int datanumber,number;
String[] data=new String[50000];
        double[] lat=new double[60000];
     double[] lon=new double[60000];
        double[] latx=new double[60000];
     double[] lonx=new double[60000];
     String[] code=new String[50000];
 
    public static void main(String[] args) {
        pro t=new pro();
    }
 
    pro(){
 
 
        readx("line.csv");
     int s;
 
for(s=2;s<datanumber+1;s++){
String[] x=data[s].split(",");
lat[s-1]=num_double(x[3]);
lon[s-1]=num_double(x[4]);  
}
 
number=datanumber-1;
 
 
  readx("post.csv");
 
 
for(s=2;s<datanumber+1;s++){
String[] x=data[s].split(",");
latx[s-1]=num_double(x[1]);
lonx[s-1]=num_double(x[0]);  
code[s-1]=x[3];
}
 
datanumber=datanumber-1;
 
 
int sx;
for(s=2;s<number+1;s++){
double mind=999999;
int sxs=0;
for(sx=1;sx<datanumber+1;sx++){
double d1=(lon[s]-lonx[sx])*(lon[s]-lonx[sx]);
d1=d1+(lat[s]-latx[sx])*(lat[s]-latx[sx]);
if(d1<mind)sxs=sx;
if(d1<mind)mind=d1;
}
System.out.println(code[sxs]);
}
 
 
 
 
    }
 
    double num_double(String str){
 
    double nx;
 
    nx=0;
 
 try{
 
    nx=Double.parseDouble(str);
 
 }catch (Exception e) {}
 
 return nx;
 
 
 
}
 
 
       void readx(String file){
 
String str;
BufferedReader br;  
int s;
s=0;
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(file),"UTF-8"));  
while((str = br.readLine()) != null) {  
s=s+1;
data[s]=str;  
}
br.close();
} catch (IOException e) {System.out.println(e);}  
 
datanumber=s;
 
} 
 
 
}