I\'m a little confused by a warning that my Eclipse IDE is currently writing next to every expression where types are autoboxed or autounboxed:
This question already has answers here: Closed 12 years ago. Possible Duplicate: Arrays.asList() not working as it should?
As Java 5 have autoboxing, why I can\'t use Comparator to sort primitiv开发者_如何学Goes? An int wouldn\'t be wrapped into a Integer?Arrays.sort(..) have dedicated overloadings for sorting primitive a
In \"Core java 1\" I\'ve read CAUTION: An ArrayList is far less efficient than an int[] array because each value is separately
With autounbox开发者_高级运维ing, this statement will automatically work: int myPrimitive = (Integer) doIt();
public class Test { Integer i; int j; public static void main ( String [] args ) { Test t = new Test (); t.go();
I understand that the following code won\'t work Float a=3 because its translated as Float a=Integer.valueOf(3). We\'ll have a Float reference on the LHS and an Integer object on the RHS, which is
Usually the compiler generates code to perform boxing and unboxing. But what does the compiler, if the boxed values are not needed? Is the (Oracle standard) compiler smart enough to optimize it away?
This question already has answers here: Weird Integer boxing in Java (12 answers) Closed 6 years ago. public class Main {
Run the fo开发者_运维技巧llowing Java code: boolean b = false; Double d1 = 0d; Double d2 = null; Double d = b ? d1.doubleValue() : d2;
加载中,请稍侯......