JVM- Java Virtual Machine
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The document discusses the Java Virtual Machine (JVM) and its class loading process. It explains that the JVM loads class files and stores their information in the method area, while instantiated objects are stored in the heap. It also describes the class loader subsystem, noting that it performs loading, linking, and initialization of classes. The linking process consists of verification, preparation, and resolution steps. Finally, it provides a diagram of the class loading process.
JVM- Java Virtual Machine
- 1. Java Virtual Machine (JVM)
- 2. Lecture Objectives • Learn about the Java Virtual Machine (JVM) • Understand the functionalities of the class loader subsystem • Understand the class initialization process
- 3. Introduction to the JVM (Cont’d) • When JVM loads a class file, it puts its information in the method area • As the program runs, all objects instantiated are stored in the heap
- 4. Introduction to the JVM (Cont’d) Figure 2: Content of Memory Blocks at runtime.
- 5. The Class Loader Subsystem • The class loader performs three main functions of JVM, namely: loading, linking and initialization • The linking process consists of three sub-tasks, namely, verification, preparation, and resolution Figure 3: Class loading process.
- 6. Class Loading Process (Cont’d) public methods are displayed ONLY!