Sun Microsystems: The Java Development Kit software and tools you need to compile applets and applications, get rid of bugs, and running to let you have written in the Java programming contains. JDK has as its main components a collection of programming tools, including javac, jar, and the archiving program, the related class libraries packaged into a single JAR file. This tool also helps manage JAR files, javadoc - the documentation generator, which automatically generates documentation from source code comments, jdb - the debugger, jps - the process status tool that displays process information for current Java processes , javap - the class file disassembler, and so many other components. The JDK includes designated as "private Runtime", a complete Java Runtime Environment, usually. It consists of a Java Virtual Machine and category from all libraries that are in production environment, as well as additional libraries available that are useful only for developers, such as the internationalization libraries and the IDL libraries. Whats new in this version: Java 7 Update 45 constitutes a new warning to the users of the applications before LiveConnect.