输出任意两个整数之间的所有素数

import java.util.Scanner;
public class In{
public static void main(String args[]){
   int ri, repeat;
      int m, n;
     System.out.print("请输入执行次数：");
     Scanner in=new Scanner(System.in);
     repeat=in.nextInt();
     for(ri=1; ri<=repeat; ri++){
      int count=0,sum=0;
      System.out.println("请指定范围："+"\n"+"从：");
      m=in.nextInt();
      System.out.println("到：");
            n=in.nextInt();
            System.out.println(m+"-------------"+n+"之间的素数有："+"\n"); 
               for(int j=m;j<=n;j++)
         {            
          if(prime(j)!=-1)
          {
           System.out.println(j); 
           count++; 
           sum+=j;
          }       
         }
             System.out.println("count="+count+", sum="+sum);
     }
}
                  
    /*
    * 以下是检测素数的方法