牛客网机试java编译不通过

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

说明:长度超过2的子串

一组或多组长度超过2的子符串。每组占一行

如果符合要求输出：OK，否则输出NG

021Abc9000021Abc9Abc1021ABC9000021$bc9000输出：

OKNGNGOK代码：

import java.util.Scanner;public class Main {public static void main ( String args ) {Scanner in = new Scanner( System.in );while ( in.hasNextLine ) {String s = in.nextLine;if ( check_length( s )) {if ( check_kinds( s ) ) {if ( check_repeat( s ) ) {System.out.println(“OK”);}else {System.out.println(“NG”);}}else {System.out.println(“NG”);}}else {System.out.println(“NG”);}}in.close;}public static boolean check_length ( String str ) {if ( str.length <= 8 ) {return false;}else {return true;}}public static boolean check_kinds ( String str ) {int num = 0;int lowerletters = 0;int upperletters = 0;int elseletters = 0;for ( int i = 0 ; i < str.length ; i++ ) {if ( Character.isDigit(str.charAt(i)) ) {num++;continue;}if ( Character.isLowerCase(str.charAt(i)) ) {lowerletters++;continue;}if ( Character.isUpperCase(str.charAt(i)) ) {upperletters++;continue;}else {elseletters++;}}if ( ( num != 0 && lowerletters != 0 && upperletters != 0 )

( elseletters != 0 && lowerletters != 0 && upperletters != 0 )

( num != 0 && elseletters != 0 && upperletters != 0 )

(num != 0 && lowerletters != 0 && elseletters != 0 )) {return true;}else {return false;}}public static boolean check_repeat ( String str ) {int num = 0;for ( int i = 3 ; i <= str.length/2 ; i++ ) {for ( int j = 0 ; j < str.length - i ; j++ ) {String s = str.substring(j, j + i );if ( str.indexOf(s) != str.lastIndexOf(s) ) {num++;}}}if ( num == 0) {return true;}else {return false;