Java program to display only repeated letters in a string

display only repeated letters in a string in Java:

In this tutorial, you will learn how to display only repeated letters in a string in the Java program.

        
        import java.util.*;
        public class printallduplicatecharc {
        
                public static void
                countDuplicateCharacters(String str)
                {
                    Map map
                            = new HashMap();
        
                    char[] charArray = str.toCharArray();
        
                    for (char c : charArray) {
        
                        if (map.containsKey(c)) {
        
        
                            map.put(c, map.get(c) + 1);
                        }
                        else {
        
        
                            map.put(c, 1);
                        }
                    }
        
        
                    for (Map.Entry entry :
                            map.entrySet()) {
        
                        if (entry.getValue() > 1) {
                            System.out.println(entry.getKey()
                                    + " : "
                                    + entry.getValue());
                        }
                    }
                }
        
                // Driver Code
                public static void main(String args[])
                {
                 System.out.println("Enter A Santense For Find Repeated Character ");
                    Scanner sc= new Scanner(System.in);
                    String str = sc.nextLine();
                    System.out.println("Enter By You \n" + str);
                    // Function Call
                    System.out.println("Repated Value ");
                    countDuplicateCharacters(str);
                }
            }
        
        
        
            

    

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