[LANG-738] Use internal Java's Number caches instead creating new objects

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0
• Fix Version/s: 3.0.1
• Component/s: lang.*

Environment

Apache Maven 3.0.3 (r1075438; 2011-02-28 12:31:09-0500)
Maven home: C:\Java\apache-maven-3.0.3\bin\..
Java version: 1.6.0_24, vendor: Sun Microsystems Inc.
Java home: C:\Program Files\Java\jdk1.6.0_24\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"

• Assignee: Gary D. Gregory
• Reporter: Gary D. Gregory
• Created: 03/Aug/11 13:53
• Updated: 16/Nov/11 06:56
• Resolved: 03/Aug/11 13:53

Description

Use internal Java's Number caches instead creating new objects:

• Use more efficient Integer cache: Use "Integer.valueOf(int)" instead of "new Integer(int)".
• Use more efficient Long cache: Use "Long.valueOf(int)" instead of "new Long(long)".
• Use more efficient Short cache: Use "Short.valueOf(int)" instead of "new Short(short)".

In Java version 1.6.0_24 (vendor: Sun Microsystems Inc.), Float and Double do not implement caches, but I've made the same changes for consistency and future proofing.

• Use "Double.valueOf(int)" instead of "new Double(double)".
• Use "Float.valueOf(int)" instead of "new Float(float)".