Runtime Environment In Java -

| Memory Area | Purpose | |-------------|---------| | | Stores all objects and arrays. Shared across threads. Managed by garbage collection. | | Stack | Each thread has its own stack storing method calls, local variables, and partial results. | | Method Area | Stores class metadata, static variables, constants, and method bytecode. | | PC Registers | Holds the address of the current executing instruction per thread. | | Native Method Stack | Supports execution of native (C/C++) code via JNI. |

1. Introduction The Java Runtime Environment (JRE) is a software layer that provides the minimum requirements for executing Java applications. It is often confused with the Java Development Kit (JDK), but while the JDK is a toolkit for developing Java programs, the JRE is the engine for running them. Without the JRE, a computer cannot execute Java bytecode. runtime environment in java

javac Hello.java Run (requires JRE):