The key points of learning Java core JVM framework

The key points of learning Java core JVM framework JVM (Java virtual machine) is the cornerstone of the Java language, which provides an environment for the Java program.The JVM framework is one of the key components of Java applications, which provides a method for effective management and accelerating the Java application.This article will introduce the key points of learning Java's core JVM framework, including garbage recovery, memory management and performance optimization. 1. Garbage Collection: JVM's garbage recovery mechanism is responsible for automatically release memory space that is no longer used to avoid memory leakage and collapse.Mastering the garbage recycling algorithm and tuning skills is an important part of learning the JVM framework.The following is a simple example, showing how to manually request JVM for garbage recovery: public class GarbageCollectionExample { public static void main(String[] args) { // Create an object Object object = new Object(); // Set the object to null, release reference object = null; // Manually request JVM for garbage recycling System.gc(); } } 2. Memory management: The JVM framework provides a set of efficient management of memory mechanism, including different areas such as heap, stack and method area.Learning to optimize memory use is the key to improving application performance.The following is an example that shows how to manually manage the stack of memory: public class MemoryManagementExample { public static void main(String[] args) { // Declarize an object array Object[] objects = new Object[10000]; // Manually release memory for (int i = 0; i < objects.length; i++) { objects[i] = null; } } } 3. Performance optimization: The JVM framework provides many options and technologies for performance tuning to improve the implementation efficiency of the Java application.Understanding and application of these technologies will greatly enhance the performance of the application.The following is an example, which shows how to set the parameters of JVM to optimize memory allocation: public class PerformanceOptimizationExample { public static void main(String[] args) { // Set jvm parameters to increase pile memory //-Xms1024m -Xmx1024m // -XMS Set the initial heap size of 1024MB // -xmx Set the maximum pile size of 1024MB // This will provide more memory procedures, thereby improving performance } } Summarize: By mastering key points such as garbage recovery, memory management and performance optimization, you can better understand and apply the Java core JVM framework.This will help developers write more efficient and reliable Java applications. Please note that this article only provides some simple examples. The real learning process needs to study related concepts and practical cases in depth.It is hoped that this article can provide valuable information and guidance for Java developers.