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  1. public final class Main {
  2.  
  3.   public static Class<Boolean> typeof(final boolean expr) {
  4.     return Boolean.TYPE;
  5.   }
  6.  
  7.   public static Class<Character> typeof(final char expr) {
  8.     return Character.TYPE;
  9.   }
  10.  
  11.   public static Class<Byte> typeof(final byte expr) {
  12.     return Byte.TYPE;
  13.   }
  14.  
  15.   public static Class<Short> typeof(final short expr) {
  16.     return Short.TYPE;
  17.   }
  18.  
  19.   public static Class<Integer> typeof(final int expr) {
  20.     return Integer.TYPE;
  21.   }
  22.  
  23.   public static Class<Long> typeof(final long expr) {
  24.     return Long.TYPE;
  25.   }
  26.  
  27.   public static Class<Float> typeof(final float expr) {
  28.     return Float.TYPE;
  29.   }
  30.  
  31.   public static Class<Double> typeof(final double expr) {
  32.     return Double.TYPE;
  33.   }
  34.  
  35.   public static Class<?> typeof(final Object expr) {
  36.     return expr == null ? null : expr.getClass();
  37.   }
  38.  
  39.   public static void main(final String[] argv) {
  40.     System.out.println(typeof(500 * 3 - 2));
  41.     System.out.println(typeof(50 % 3L));
  42.     System.out.println(typeof(new String()));
  43.     System.out.println(typeof(argv));
  44.     System.out.println(typeof(argv.length));
  45.     System.out.println(typeof(4f));
  46.     System.out.println(typeof(null));
  47.   }
  48. }
Success #stdin #stdout 0.06s 215488KB
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Standard input is empty
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int
long
class java.lang.String
class [Ljava.lang.String;
int
float
null
https://ideone.com/JPgec
language:
Java (12.0.1)
created:
12 years ago
visibility:
public

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