What is JRE (Java Runtime environment)

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JRE (Java Runtime environment)

JRE provides environment for running/executing programs.

You need to have JRE in your system for >

• running Java programs.

JRE contains-

• JVM,
• class libraries (rt.jar)  and
• other supporting libraries (external jars, Ex - ojdbc.jar for JDBC) for executing java program.

In short  JRE = JVM + class libraries (rt.jar)  + other libraries (if any).

JRE diagram >

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