实践jdk1.2新特性

Collections framework.

Java String memory map for constants.

Just In Time (JIT) compiler.

Jar Signer for signing Java ARchive (JAR) files.

Policy Tool for granting access to system resources.

Java Foundation Classes (JFC) which consists of Swing 1.0, Drag and Drop, and Java 2D class libraries.

Java Plug-in

Scrollable result sets, BLOB, CLOB, batch update, user-defined types in JDBC.

Audio support in Applets.

参考

Java Versions, Features and History

Java Programming Language Enhancements