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what is the difference between jdk,sdk and jre. what are its uses.?

What is the difference between jdk,sdk and jre. What are its uses. Is it necessary to type "javac and java" commands to run a java program. But we are not using these commands to run a software developed in java. For example a game developed in java. we are just double clicking and start the program. In this case no "javac" or "java" . How is it possible. Can we do it ourselves. plz help, And refer me any good books . thank you.

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    JDK:java development kit

    It is used to developed and java application.

    SDK:software development kit

    It is used to developed more advanced commercialized application.

    JRE;java run time environment

    It is used to run and java based any program.

    javac and java command are belong to JDK

    javac are used for compilation and

    java are used to launch an program.

    second question is related to executable JAR files.

    you can double click on executable JAR file.you can make executable jar file from your compile java program."referred black book of java"

    Source(s): :)
  • 4 years ago

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