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Create removeDuplicateFromString.java #60

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Merged
merged 1 commit into from
Jun 27, 2017
Merged

Create removeDuplicateFromString.java #60

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45 changes: 45 additions & 0 deletions removeDuplicateFromString.java
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import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
*
* @author Varun Upadhyay (https://github.com/varunu28)
*
*/

public class removeDuplicateFromString {
public static void main (String[] args) throws Exception{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String inp_str = br.readLine();

System.out.println("Actual string is: " + inp_str);
System.out.println("String after removing duplicates: " + removeDuplicate(inp_str));

br.close();
}

/**
* This method produces a string after removing all the duplicate characters from input string and returns it
* Example: Input String - "aabbbccccddddd"
* Output String - "abcd"
* @param s String from which duplicate characters have to be removed
* @return string with only unique characters
*/

public static String removeDuplicate(String s) {
if(s.isEmpty() || s == null) {
return s;
}

StringBuilder sb = new StringBuilder("");
int n = s.length();

for (int i = 0; i < n; i++) {
if (sb.toString().indexOf(s.charAt(i)) == -1) {
sb.append(String.valueOf(s.charAt(i)));
}
}

return sb.toString();
}
}