Compile it using javac from Java 2 Platform, Standard Edition (J2SE) 1.4.1 and run it in an earlier version of the Java Runtime Environment (JRE): >...jdk1. 4.1 binjavac Hello.java ...

Add or Remove Programs entry for J2SE Runtime Environment 5.0 Update 7. Java SE consists of a virtual machine, which must be used to run Java programs, together with a set of libraries (or "packages") ...