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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.util.HashMap;
  7. import java.util.Map;
  8. import java.util.Map;
  9. import java.util.TreeMap;
  10.  
  11. /* Name of the class has to be "Main" only if the class is public. */
  12. class Ideone
  13. {
  14. 	public static void main (String[] args) throws java.lang.Exception
  15. 	{
  16. 		String s = "Vê se tira notas boas!";
  17.         Map<String, Integer> map = contar(s.replace(" ", "").toLowerCase());
  18.         Imprimir(map);
  19. 	}
  20. 	public static Map<String, Integer> contar(String frase)
  21.     {        
  22.         Map<String, Integer> map = new TreeMap<>();                
  23.         for(char item : frase.toCharArray())
  24.         {
  25.             Integer s = map.get(String.valueOf(item));
  26.             if (s != null)
  27.             {
  28.                 map.put(String.valueOf(item), ++s);
  29.             }
  30.             else
  31.             {
  32.                 map.put(String.valueOf(item), 1);
  33.             }
  34.         }
  35.         return map;
  36.     }
  37.  
  38.     public static void Imprimir(Map<String, Integer> items)
  39.     {       
  40.         for(Map.Entry<String, Integer> a : items.entrySet())
  41.         {
  42.             System.out.println(a.getKey() + ": " +  a.getValue());
  43.         }    
  44.     } 
  45. }
Success #stdin #stdout 0.04s 4386816KB
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stdin
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Standard input is empty
stdout
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!: 1
a: 3
b: 1
e: 1
i: 1
n: 1
o: 2
r: 1
s: 3
t: 2
v: 1
ê: 1
https://ideone.com/bb8IDR
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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