Simply put, JRE happens to be a subset of JDK that is, it is included in JDK. JDK is a development kit containing JRE and the development tools (debugger and compiler) needed for getting a program output in Java. Java Runtime Environment (JRE) is required for running programs of Java, whereas JDK is required for writing and running the programs. JDK is an open-source software provided by Sun Microsystems, now taken over by Oracle, for anyone to use freely for programming.ĭo many people have the question, JDK or JRE? So let us look at what each is used for. It is also known as the Java Platform Standard Edition (Java SE). The Java Development Kit (JDK) is helpful to write programs in Java. The following article provides an outline for Install JDK.
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