Get common characters in given two strings

Get common characters in given two strings

• In given two strings, find common characters between two strings.

Examples:

Input:

String s1="xyabf";

String s2="xzcfa";

o/p: xaf xfa

Here, characters xaf are common in both string1 and string2

Input:

String s1="ramu";

String s2="somu";

o/p: mu mu

Program:

public class removeUnCommonCharacters {

    public static void main(String[] args) {
    // get common characters
    String s1 = "xyabf";
    String s2 = "xzcfa";

    String unCommonS1 = "";
    for (int i = 0; i <= s1.length() - 1; i++) {
        if (s2.contains((String.valueOf(s1.charAt(i))))) {
            unCommonS1 += s1.charAt(i);
        }
    }
    System.out.println("Common characters in string " + s1 + " is = " + unCommonS1);
    
    String unCommonS2 = "";
    for (int i = 0; i <= s2.length() - 1; i++) {
        if (s1.contains((String.valueOf(s2.charAt(i))))) {
            unCommonS2 += s2.charAt(i);
        }
    }
    System.out.println("Common characters in string  " + s2 + " is = " + unCommonS2);
    
    System.out.println("concat-common characters in strings " + s1 + "," + s2 + " is = " + (unCommonS1 + " " + unCommonS2));
    }
}

Output:
Get common characters in given two strings
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