Java Development Kit
Answered by
Manish Karma
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JDK is java development kit whereas J2SDK is the newer one and is called as Java 2 software development kit.
No, not necessarily. JDK stands for Java Development Kit and JRE stands for Java Runtime Environment. They can be of the same or different versions each. It is better if we have two compatible or same versions of JDK and JRE installed for ease of use.
J2EE = enterprise edition jdk. J2SE = standard edition jdk. J2ME = mobile edition jdk. standard jdk gets used for platform development, enterprise jdk for enterprise development and mobile jdk gets used for mobile development.
Get the JDK & Bluej from net and the rest will be done by them. Java byte codes are stored as *.class ; where "*" represents the class name, in your hard disk. You can download BlueJ as well as JDK from the related link.