密码验证合格程序

密码要求:
 
 
 
1.长度超过8位
 
 
 
2.包括大小写字母.数字.其它符号,以上四种至少三种
 
 
 
3.不能有相同长度超2的子串重复
import java.util.Scanner;


public class Main{
	public static void main(String[] args) {
		Scanner scanner=new Scanner(System.in);
		String s;
		while(scanner.hasNext()){
			s=scanner.next();
			if(s.length()>8&&hasNoRepeat(s)&&hasThree(s)){
				System.out.println("OK");
			}else{
				System.out.println("NG");
			}
		}		
	}
	
	public static boolean hasNoRepeat(String s){
		String temp;
		for(int i=0;i<s.length();i++)
			for(int j=i+2;j<s.length();j++){
				temp=s.substring(i,j);
				if(s.indexOf(temp, j+1)!=-1){
					return false;
				}
			}
		return true;
	}
	
	public static boolean hasThree(String s){
		int count=0;
		boolean hasNum=false;
		boolean hasLowChar=false;
		boolean hasHighChar=false;
		boolean hasOther=false;
		char c;
		for(int i=0;i<s.length();i++){
			c=s.charAt(i);
			if('0'<=c&&c<='9'){
				if(!hasNum){
					hasNum=true;
					count++;
				}
			}else if('a'<=c&&c<='z'){
				if(!hasLowChar){
					hasLowChar=true;
					count++;
				}
			}else if('A'<=c&&c<='Z'){
				if(!hasHighChar){
					if(!hasHighChar){
						hasHighChar=true;
						count++;
					}
				}
			}else{
				if(!hasOther){
					hasOther=true;
					count++;
				}
			}
			if(count>=3){
				return true;
			}
			
		}
		return false;
	}
}