在Java API 中是这样解释的：Returns an Integer instance representing the specified int value. If a...
importjava.util.Iterator;publicclassRange<Integer>implementsIterable<Integer>{privateintstart;privateintend;publicRange(intstart,intend){this.start=start;this.end=end;}@OverridepublicIterator<Integer>iterator(){returnnewRangeIterator(start,end);}privateclassRangeIteratorimplementsIterator<Integer>{privateintcurr...
importjava.lang.annotation.ElementType;importjava.lang.annotation.Retention;importjava.lang.annotation.RetentionPolicy;importjava.lang.annotation.Target;@Target(ElementType.FIELD)@Retention(RetentionPolicy.RUNTIME)public@interfaceRange{intmin()defaultInteger.MIN_VALUE;intmax()defaultInteger.MAX_VALUE;} 1. 2. ...
This method will always cache values in the range -128 to 127, inclusive, and may cache other values outside of this range. 此⽅法将始终缓存-128到127（包括端点）范围内的值，并可以缓存此范围之外的其他值 缓存设计 valueOf ⽅法中 IntegerCache.low = -128； IntegerCache.high = 127 ; 也就...
The string is converted to an int value in exactly the manner used by the parseInt method for radix 10. Parameters: s - the String to be converted to an Integer. Throws: NumberFormatException - if the String does not contain a parsable integer. See Also: parseInt(java.lang.String, int)...
* This method will always cache values in the range -128 to 127,//这个方法会缓存范围[-128,127]之间的数 * inclusive, and may cache other values outside of this range. * * @param i an {@code int} value. * @return an {@code Integer} instance representing {@code i}. ...
1 Integer.valueOf() 整形的赋值操作底层其实是调用了 Integer.valueOf(num) 方法。 所以, Integer a = 888 这句代码其实等价于: Integer a = Integer.valueOf(888); 来看看 Integer.valueOf 的代码实现: /*** This method will always cache values in the range -128 to 127,* inclusive, and may...
This method will always cache values in the range -128 to 127, inclusive, and may cache other values outside of this range. Added in 1.5. Java documentation forjava.lang.Integer.valueOf(int). Portions of this page are modifications based on work created and shared by theAndroid Open Source...
This method will always cache values in the range -128 to 127, inclusive, and may cache other values outside of this range. @param i an {@code int} value. @return an {@code Integer} instance representing {@code i}. @since 1.5 ...
* This method will always cache values in the range -128 to 127, * inclusive, and may cache other values outside of this range. * * @param i an {@code int} value. * @return an {@code Integer} instance representing {@code i}. ...