We start with splitting the string and collecting all words in aList. Then we use theHashSet.add()method to check if the word is unique or duplicate. List<String>wordsList=Arrays.asList(sentence.split(" "));Set<String>tempSet=newHashSet<>();List<String>duplicateWords=newArrayList<>();...
"Java"); } /* * Find all duplicate characters in a String and print each of them.*/ public static void printDuplicateCharacters(String word) { char[] characters = word.toCharArray(); // build HashMap with character and number of times they appear in String...
publicintfindDuplicate(int[]nums){intslow=0;// 慢指针intslow1=0;// 慢指针intfast=0;// 快指针while(true){slow=nums[slow];// 慢指针前进一步fast=nums[nums[fast]];// 快指针前进两步if(slow==fast){// 当相遇时退出break;}}while(true){slow=nums[slow];//原来的慢指针继续走slow1=nums...
How to find the highest repeated word from a File in Java Here is the Java program to find the duplicate word which has occurred a maximum number of times in a file. You can also print the frequency of words from highest to lowest because you have the Map, which contains the word and...
Java Program to find duplicate Characters in a String Other String Programs : In this post, we will see how to find duplicate Characters in a String. Approach: Create a HashMap and character of String will be inserted as key and its count as value. If Hashamap already contains char,increa...
Check map.Duplicate charactershave the count of more than 1. Distinct characterswill have the count as 1. 1.2. Java Program publicstaticMap<Character,Integer>getCharBag(Stringinput){Map<Character,Integer>map=newHashMap<>();if(input==null||input.isEmpty())returnmap;for(charc:input.toCharArray...
最后看内容对应文件数大于1的就是有duplicate. Time Complexity: O(paths.length * x). x为input string的平均长度. Space:O(paths.length * x). hm size. AC Java: 1classSolution {2publicList<List<String>>findDuplicate(String[] paths) {3List<List<String>> res =newArrayList<List<String>>();4...
In Java 8 Stream, filter withSet.Add()is the fastest algorithm to find duplicate elements, because it loops only one time. Set<T> items =newHashSet<>();returnlist.stream() .filter(n -> !items.add(n)) .collect(Collectors.toSet()); ...
Step 4.Create a Model class called Car. So we will determine duplicate car is found based on make, model and year fields. package com.roytuts.model; public class Car { private String make; private String model; private int year;
Regex flavors: .NET, Java, JavaScript, PCRE, Perl, Python, Ruby If you want to use this regular expression to keep the first word but remove subsequent duplicate words, replace all matches with backreference 1. Another approach is to highlight matches by surrounding them with other characters ...