Write a Java Program to remove duplicate characters from String Without Using any API ?

Here we will learn the program to remove all the duplicate characters from string ,suppose we have string "Malayalam" then output will be "Malym". In given string we have duplicate character like 'a', and 'l' , so the output will become "Malym".

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public class RemoveDuplicateCharacter { public static void remove(String str){ String output = ""; String duplicateChar = ""; for(int i=0;i<str.length();i++){ if(output.contains(String.valueOf(str.charAt(i)))){ duplicateChar+= str.charAt(i); } else{ output+= str.charAt(i); } } System.out.println("Original String :\t"+str+"\nDuplicate Characters :\t"+duplicateChar+"\nOutput String :\t\t"+output); } public static void main(String[] args) { RemoveDuplicateCharacter.remove("Pushkarsa"); System.out.println(); RemoveDuplicateCharacter.remove("Malayalam"); } }

Output:

Original String : Pushkarsa

Duplicate Characters : sa

Output String : Pushkar

Original String : Malayalam

Duplicate Characters : aala

Output String : Malym

      

Blog Author - Pushkar Khosla,
Software Developer by Profession with 3.0 Yrs of Experience , through this blog i'am sharing my industrial Java Knowledge to entire world. For any question or query any one can comment below or mail me at pushkar.itsitm52@gmail.com.

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