当前页面: 在线文档首页 > JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档
This page summarizes the differences between the 1.2 and 1.3 releases
of the Collections Framework, along with a brief rationale for each change.
Collections Framework Change Summary - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档
|
Collections Framework API Change Summary |
Convenience Implementations
- Added singletonList and singletonMap. Previously, there was a convenience implementation for singleton Set, but no corresponding implementation for List and Map.
- Added EMPTY_MAP. Previously, there were constants for the empty Set and List, but no corresponding constant for Map.
Special-purpose Implementation
- Added Map constuctor for WeakHashMap. The Map interface dictates that most Map implementations should have a "copy constructor" that takes a Map argument. WeakHashMap lacked such a constructor in the 1.2 release.
|
Copyright © 1995-99 Sun Microsystems, Inc. All Rights Reserved. Please send comments to: collections-comments@java.sun.com |
Java Software |