Enhancements to java.math - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

Enhancements to java.math

The following enhancements were made to the java.math package in version 1.3 of the Java^TM 2 SDK.
Performance enhancements in BigIntenger
Class java.math.BigInteger has been reimplemented in pure Java programming-language code. Previously, BigInteger's implementation was based on an underlying C library. On a high-quality VM, the new implementation performs all operations faster than the old implementation. The speed-up can be as much as 5x or more, depending on the operation being performed and the length of the operands.
More robust BigDecimal(String) constructor
The BigDecimal(String) constructor has been enhanced to allow signed strings (for example, "+2.71828") and exponential notation (for example, "1.23E-23") as input.

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