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  1. class HelloWorld {
  2.  
  3.      public static void main(String []args){
  4.  
  5.         String var1 = "1";
  6.  
  7.         if (var1.equals("Uno") || siEntero (var1) == 1){
  8.             System.out.println("CORRECTO: Picked 1 porque la cadena pudo convertirse a entero");
  9.         }
  10.  
  11.         String var2 = "1 ";
  12.  
  13.         if (var2.equals("Uno") || siEntero (var2) == 1){
  14.             System.out.println("Caso 2: Picked 1");
  15.         }
  16.  
  17.  
  18.        String var3 = "  1  ";
  19.  
  20.         if (var3.equals("Uno") || siEntero (var3) == 1){
  21.             System.out.println("Caso 3: Picked 1");
  22.         }
  23.  
  24.      }
  25.  
  26.  
  27.     private static  Integer siEntero(String text) {
  28.         try {
  29.                 return Integer.parseInt(text);
  30.  
  31.         } catch (NumberFormatException e) {
  32.                 System.out.println("ERROR: La cadena '"+text+"' no pudo convertirse a entero\n  Log:"+e);
  33.                 return 0;
  34.         }
  35.     }
  36.  
  37. }
Success #stdin #stdout 0.04s 4386816KB
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Standard input is empty
stdout
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CORRECTO: Picked 1 porque la cadena pudo convertirse a entero
ERROR: La cadena '1 ' no pudo convertirse a entero
  Log:java.lang.NumberFormatException: For input string: "1 "
ERROR: La cadena '  1  ' no pudo convertirse a entero
  Log:java.lang.NumberFormatException: For input string: "  1  "
https://ideone.com/BOSkvn
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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