光宇游戏Java开发（运营）笔试题.zip

package test; import java.util.HashSet; import java.util.Set; public class Main { public static int maxLength(String str){ if(str==null||str.equals("")){ return 0; } Set<Character> set=new HashSet<Character>(); int maxLength=0; int pre=0; int after=0; while(after<str.length()){ if(!set.contains(str.charAt(after))){ set.add(str.charAt(after)); after++; }else{ set.clear(); if((after-pre)>maxLength){ maxLength=after-pre; } pre++; after=pre; } } if((after-pre)>maxLength){ maxLength=after-pre; } return maxLength; } public static void main(String[] args) { String str="y father was a self-taught mandolin player. He was one of the best string instrument players in our town. He could not read music, but if he heard a tune a few times, he could play it. When he was younger, he was a member of a small country music band. They would play at local dances and on a few occasions would play for the local radio station. He often told us how he had auditioned and earned a position in a band that featured Patsy Cline as their lead singer. He told the family that after he was hired he never went back. Dad was a very religious man. He stated that there was a lot of drinking and cursing the day of his audition and he did not want to be around that type of environment."; System.out.println(maxLength(str)); } }