백준 1929: 소수구하기 자바 java

https://www.acmicpc.net/problem/1929

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import java.io.*;
import java.util.*;

public class Main {

    public static void main(String[] args) throws IOException{
    	
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	String arrange = br.readLine();
    	StringTokenizer st = new StringTokenizer(arrange," ");
    	int start = Integer.parseInt(st.nextToken());
    	int end = Integer.parseInt(st.nextToken());
    	
    	for(int i=start;i<=end;i++) {
    		check(i);
    	}
    }
    public static void check(int n) {
    	if(n==1)	return;
    	
    	for(int i=2;i<=Math.sqrt(n);i++) {
    		if(n%i==0)	return;
    	}	
    	System.out.println(n);
    }
}