题目:产生5000个1--9999的随机数,然后找出最大值,最小值,计算出5000个数的平均值
可是,偶的程序输出不了数,为什么??????????
import java.io.*;
public class File1{
public static void main(String args[]) throws IOException{
FileWriter fr=new FileWriter("c:\\j2sdk1.4.2\\java\\a.txt");
BufferedWriter br=new BufferedWriter(fr);
for(int i=0;i<5000;i++){
long w=Math.round(Math.random()*10000);
if(w>0 && w<9999){
br.write(Long.toString(w));
System.out.println();
br.newLine();
}
}
br.flush();
fr.close();
FileReader fr1=new FileReader("c:\\j2sdk1.4.2\\java\\a.txt");
BufferedReader br1=new BufferedReader(fr1);
String str=br1.readLine();
long max=1,min=9999,aver,s,sum=0;
while(str!=null){
s=Long.parseLong(str);
sum=sum+s;
if(s>max){
max=s;
}
if(s<min){
min=s;
}
}
System.out.println("max="+max);
System.out.println("aver="+sum/5000);
System.out.println("min="+min);
fr1.close();
}
}