The last one in the original "reference resource" should be:
A set of container classes that specifically to save basic types of data are available in Jakarta Commons Primitives components. And use Java Collection Framework and Autoboxing / Auto-Unboxing to complete the same task, they have more advantages over performance.
Thank you for your pointing.
Original "Listing 4: The equivalent form after autoboxing" is incorrect, should be:
Listing 4: Equivalent form after Autoboxing
Collection al = new arraylist ();
Al.Add (
Integer.Valueof (1));
When performing autoboxing, it is not a configuration method of the corresponding parcel class, but uses their Valueof static method to obtain a new instance (the Valueof method of the package classes in J2SE 1.5 is enhanced, and the corresponding basic type of value can be accepted. Parameters).
Corresponding, original "Listing 11: Autoboxing operations occur before the automatic upward transition" should be changed:
Listing 11: AutoBoxing operations occur before the automatic upward transition
INT I = 27828;
System.out.println (
(Long) INTEGER.VALUEOF (i)); / * Compile time error * /
In addition, the original "Listing 12: Need to force up to the top, then make Boxing" There is a pen error, should be renamed:
Listing 12: Need to force up to transition first, then make Boxing
INT I = 27828;
System.out.println ((long)
(long) i);
