光宇游戏java运营测试题.zip

import java.util.HashMap; import java.util.Map; public class StringUtils { public static int StringFind(String goal){ Map<Character, Integer> chars=new HashMap<>(); int result=0; int b=0; for(int i=0;i<goal.length();i++){ char ch= goal.charAt(i); if(chars.containsKey(ch)){ b=Math.max(chars.get(goal.charAt(i))+1,b); //System.out.println(result); if((i-b+1)>result){ result=i-b+1; } }else{ if((i-b+1)>result){ result=i-b+1; } } chars.put(ch, i); } return result; } }