Explain classes of java.lang package

Java

The lang package contains classes for data types like Boolean, String etc and also some other classes like Thread.

Java.sun.com/j2se/1.4.2/docs/api/Java/lang/package-summary.html">http://Java.sun.com/j2se/1.4.2/docs/api/Java/lang/package-summary.html

Refer this for complete details.