47 lines
1.3 KiB
Java
47 lines
1.3 KiB
Java
package Others;
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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/**
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* @author Varun Upadhyay (https://github.com/varunu28)
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*/
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public class RemoveDuplicateFromString {
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public static void main(String[] args) throws Exception {
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BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
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String inp_str = br.readLine();
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System.out.println("Actual string is: " + inp_str);
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System.out.println("String after removing duplicates: " + removeDuplicate(inp_str));
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br.close();
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}
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/**
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* This method produces a string after removing all the duplicate characters from input string and returns it
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* Example: Input String - "aabbbccccddddd"
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* Output String - "abcd"
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*
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* @param s String from which duplicate characters have to be removed
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* @return string with only unique characters
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*/
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public static String removeDuplicate(String s) {
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if (s == null || s.isEmpty()) {
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return s;
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}
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StringBuilder sb = new StringBuilder("");
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int n = s.length();
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for (int i = 0; i < n; i++) {
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if (sb.toString().indexOf(s.charAt(i)) == -1) {
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sb.append(String.valueOf(s.charAt(i)));
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}
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}
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return sb.toString();
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}
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}
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