How To Find Duplicate Words In Java

11 Apr, 2021

Once the traversal is complete print the HashMap. You can use the split method of javalangString class to do that this method returns an array of words.

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String Left pad a string.

How to find duplicate words in java. J if inputi inputj i j duplicate element found duplicates. The task is to find duplicate elements in a Regular Expression in Java. String Find duplicate characters.

String Trailing whitespaces. If the word is already stored in the map increase the count and store the updated count as value for that word. Used containsKey method of HashMap to check whether the word present or not.

If a match found then increment the count by 1 and. Return duplicates. Given an Expression which is represented by String.

Map duplicateString new HashMap. Convert the string into lowercase to make the comparison insensitive. Traversing the array check if the word is in the HashMap or not.

Outer loop will select a word and Initialize variable count to 1. Public class DuplicatewordsUsingHashmap public static void mainString args HashMap wordsCnt new HashMap. String Find duplicate words.

Class DuplicateWords public static void main String args String str This is a program to find duplicate words in a string again. Words if duplicateStringcontainsKey x duplicateStringput x duplicateStringget x 1. For e-g This is is my my my pal pal pal pal pal pal pal pal will output This is my pal Also Only one iteration with while mfind is enough with this pattern.

Else store value as 1 for that key word. To detect dupplicates if that is your question add all elememts of the array to a Set if setadd returns false then it is a dupplicate so you can add this elemen to your result list of dupplictes. PRINT Duplicate words in a.

String words strtoLowerCase trim split. List wordsArraysasList sentencesplit. If the word is present in the HashMap then increase the value against the word.

Systemoutprintln Enter an input sentence. String sentence inpStrnextLine. The below pattern will match duplicate words even with any number of occurrences.

String Reverse recursively. String Check empty string. After all words are scanned run one for loop to read.

String Reverse words. String Right pad a string. Scanner inpStr new Scanner Systemin.

DEFINE count STEP 4. I was testing the code and did not see Brendan Robert answer. This code follows the same logic as his answer.

Algorithm Define a string. String Get first 4 characters. In order to find duplicate words we first need to divide the sentence into words.

Public class DuplicatewordsUsingFrequency. Finally iterate over HashMap keyset and check with each keys value if it is greater than 1 then it is a duplicate word. String Leading whitespaces.

Use a map or set data. Split the string into words. Public static Set findDuplicates int input Set duplicates new HashSet.

If both are equal substitute the original element with only one half thus removing the repetition. Check if the HashMap contains that word or not. INITIALIZE words to SPLIT the string.

Now the for loop is implemented which will iterate from zero till string length. This is the second solution to identify the duplicate words in a given input sentence of strings using the HashMap methods. Now the for loop is implemented which will iterate from zero till string length.

CONVERT string into lower-case. Int count 1. DEFINE String string Big black bug bit a big black dog on his big black nose STEP 3.

The Systemoutprintln is used to display the message Duplicate Characters are as given below. String Remove whitespaces. I for int j 1.

The code just split each entry of the list into two substrings dividing by the half point. Two loops will be used to find duplicate words. For that you can split the String on space using a greedy regular expression so that it can handle multiple white spaces between words.

For int i 0. For String x. If HashMap contains word then increment its value by 1 and If a word is not present put that word as key and value as 1.

Or if your question is meaning to return the values without duplicates then you can retirnthe set or convert the set to list before returning. Public static void main String args. If it is not in the HashMap then store the word as key and 1 as the initial value.

Split the given string and store the words into a String array.

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