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Preface This article requires the reader to be familiar with the general garbage collection principles built into the JVM. Heap memory is divided into Eden, Survivor and Tenured/Old spaces. Generation assumption and other different GC algorithms are beyond the scope of this paper. Minor GC Reclaiming memory from younger generation spaces, i ...

Java Multithreading Series 7. Let's talk about another feature of threads: daemon threads or user threads? Let's first look at the annotations for the Thread.setDaemon() method, as shown below. Marks this thread as either a daemon thread or a user thread. The Java Virtual Machine exits when the only threads running are all daemon threads. Thi ...

jprofile installation Linux Server InstallationOfficial website address Choose: After downloading, upload to the server under test under / opt, decompress, renamed: jprofiler11 Local Installation Clientmac Cracked Edition Download Address Download and install according to the tutorial on the web p ...

Thread Foundation 1. Understanding threads in java 1) Programs in java are inherently multithreaded public static void main(String[] args) { ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(false, false); for (ThreadInfo threadInfo : threadInfos) { System ...

Cloneable:CloneableSupportedException clone() provided by the Object class can only be used if the subclass implements the Cloneable interface, otherwise the above exception will be thrown. protected native Object clone() throws CloneNotSupportedException; To make an object copy, we must implemen ...

Re-lockable: Simply put, repetitive locking is supported and reusable Features: Locks can be passed, methods can be passed recursively Objective: To avoid deadlock phenomenon. Code: public class Test implements Runnable { @Override public void run() { method1(); } public synchronized void method1() { ...

1. exceptions What is an exception? The problem with Java code at runtime is exceptions. In Java, exception information is encapsulated into a class. When problems arise, exception class objects are created and exception-related information (such as the location, cause, etc.) is thrown.   1.1 Abnormal Inheritance System   Exception cla ...

JDK 13 was officially released on September 17, 2019. The new version contains five main features JEP 350: Dynamic CDS Archives JEP 351: ZGC: Uncommit Unused Memory JEP 353: Reimplement the Legacy Socket API JEP 354: Switch Expressions (Preview) JEP 355: Text Blocks (Preview) Dynamic CDS Archives First, we introduce CDS, which is called Class ...

This series of articles will be sorted out into my Java Interview Guide warehouse on GitHub. For more interesting information, please visit my warehouse. https://github.com/h2pl/Java-Tutorial If you like, please trouble Star, Fork, Watch three Lian ha, thank you for your support. The article was first published on my personal blog: www.how2play ...

Articles Catalogue I. Examples of Several Enumeration Classes 1. Simplest Enumeration 2. General Enumeration Class Usage 3. Use enumeration in switch Enumeration Class Method I. Examples of Several Enumeration Classes 1. Simplest Enumeration enum Nuber { One, Two }// enum's grammatica ...