src/java.base/share/classes/java/lang/Integer.java

rev 13019 : 8141678: sun.invoke.util.Wrapper eagerly initializes all integral type caches
Reviewed-by: TBD

*** 72,81 ****
--- 72,86 ----
       */
      @SuppressWarnings("unchecked")
      public static final Class<Integer>  TYPE = (Class<Integer>) Class.getPrimitiveClass("int");
  
      /**
+      * Zero {@code Integer} constant.
+      */
+     private static final Integer ZERO = new Integer(0);
+ 
+     /**
       * All possible chars for representing a number as a String
       */
      static final char[] digits = {
          '0' , '1' , '2' , '3' , '4' , '5' ,
          '6' , '7' , '8' , '9' , 'a' , 'b' ,
*** 947,958 ****
              }
              high = h;
  
              cache = new Integer[(high - low) + 1];
              int j = low;
!             for(int k = 0; k < cache.length; k++)
!                 cache[k] = new Integer(j++);
  
              // range [-128, 127] must be interned (JLS7 5.1.7)
              assert IntegerCache.high >= 127;
          }
  
--- 952,965 ----
              }
              high = h;
  
              cache = new Integer[(high - low) + 1];
              int j = low;
!             for(int k = 0; k < cache.length; k++) {
!                 int val = j++;
!                 cache[k] = (val == 0) ? ZERO : new Integer(val);
!             }
  
              // range [-128, 127] must be interned (JLS7 5.1.7)
              assert IntegerCache.high >= 127;
          }