prime1.java

常用的JAVA程序

import java.io.*;
public class Prime1 {
public static void main(String args[]) throws IOException
{BufferedReader buf;
String str;
int a,j,i;int m=0;
buf=new BufferedReader(new InputStreamReader(System.in));
System.out.print("Input a string:");
str=buf.readLine();
a=Integer.parseInt(str);
for(i=2;i<=a;i++)
{for(j=2;j<=i-1;j++)
	{if(i%j==0)
		break;}
if(j>i-1)
	{System.out.print(" "+j);
	m++;}
if(m%10==0)
	System.out.println();}
}
	}