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JVM- Java Virtual Machine
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JVM- Java Virtual Machine

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Transcript

  • 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!