All occurences of character present in Given String

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.concurrent.SynchronousQueue;

public class StringOccurence {

  public static void main(String[] args) {
  
 String str;
 Scanner sc;
 System.out.print("Enter the string :");
 sc=new Scanner(System.in);
 str=sc.next();
 
        //Method Call 
 printOccurence(str);

  }
  //method for printing occurences
  private static void printOccurence(String str)
  {
 //creating one map
 HashMap map=new HashMap();
  
 char[] charArr=str.replaceAll("\\s","").toLowerCase().toCharArray();
  
 //logic to detect and store all occurences
 for(char c:charArr)
 {
  if(map.containsKey(c))
  {
   map.put(c,map.get(c)+1);
  }
  else
  {
   map.put(c,1);
  }
 }
  
 //logics to print all the occurences
 for(Map.Entry entry:map.entrySet())
 {
  System.out.print("Key :"+entry.getKey()+"  "+"Value :"+entry.getValue());
 }
  }
}