找出不大于n的最大质数(java语言)

Scanner sr=new Scanner(System.in);

	int n = sr.nextInt();
	
	for (int i = n; i>=2; i--) {
		
		for (int j = 2; j <i; j++) {
			
			if(i%j==0) {
				break;
			}
			if(j==i-1) {
				System.out.println(i);
				return;
			}
		}
	}