Find the top 3 words in a sentence

Java Programs

/**
 * @author +Java Script
 * Top 3 words from sentence
 */

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

public class SentenceWord {
public static void main(String[] args) {
Map<String,Integer> map = new HashMap();
Scanner sc = new Scanner(System.in);
String str = sc.nextLine();

for(String s: str.split("\\s")){
           if(map.containsKey(s)){
       int a =  map.get(s);
       a = a+1;
       map.put(s,a);
}else{map.put(s,1);}
}
System.out.println(map);
}}

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