JavaCodeTra 判断质数

import java.util.Scanner;

/**
 * 
 */

/**
 * @author Harry
 *
 */
public class IsPrim {

	/**
	 * @param args
	 */
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.print("请输入所给数字：");
		Scanner scanner = new Scanner(System.in);
		int num = scanner.nextInt();
		//System.out.println(isPrim(num));
		//IsPrim test = new IsPrim();
		System.out.print(isPrim(num));
	}
	private static  boolean isPrim(int num){
		if(num <1) return false ;
		if(num == 2) return true ;
		int i ; 
		for(i = 2;i < num-1;i++){
			if(num%i == 0){ 
				System.out.print("并不是质数");
				return false;
			}
		}
		System.out.print("是质数");
		return true;
		}

}