4.How to remove duplicate Characters from a String in java.

Description:

Write a sample code to remove duplicate Characters from a String.

Code:

? 1 2 3 4 5 6 7 8 9 10 import java.util.HashSet; import java.util.Set; public class RemoveDuplicate { public static void main(String[] args) { String str = "godblessgovind"; char[] characters = str.toCharArray(); Set set = new HashSet(); StringBuilder sb = new StringBuilder(); System.out.println("String with duplicates : " + str); for (char c : characters) { if (!set.contains(c)) { set.add(c); sb.append(c); } } System.out.println("String after duplicates removed : " + sb.toString()); } }

Output:

String with duplicates : godblessgovind String after duplicates removed : godblesvin