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reference resources In depth understanding of the creation process of Java objects: class initialization and instantiation Deep JVM parental delegation model [jvm] take JDBC as an example to talk about the destruction of parental delegation model Why should the loading mechanism of two parent delegation be adopted for JVM class loading? Java ...

JVM01 - JVM Memory Structure 1.JVM Learning Route 2. Program counters Effect: The process from the java code in the computer to the execution is: source code to byte code, binary byte code to jvm instruction, handed to the interpreter, the interpreter to machine code, executed by the CPU. Just like this, the jvm instruction is execute ...

1. Introduction to Tomcat Tomcat is a core project of the Apache Software Foundation project, developed by Apache, Sun, and a number of other companies and individuals. Tomcat server is a free, open source Web application server. It is a lightweight application server. It is widely used in small and medium-sized systems and in situations ...

Call of kotlin data class Call of object simple profit mode class in Kotlin Calling file class in Kotlin Flexible transfer of parameters by calling jvm annotation String string null call Call of kotlin data class kotlin Code: package com.tianfu.kotlin /** * age Member annotations cannot have get and ...

  All of them have the function of gathering data and pulling data storage. mark their respective roles. Collect: /** * Return an array that contains all of the elements in this RDD. * * @note This method should only be used if the resulting array is expected to be small, as * all the data is loaded into the driver's memory. ...

1. What is a deadlock? What's the harm? 1.1 what is deadlock? Occurs in concurrency [mutually exclusive]: when two (or more) threads (or processes) hold each other's resources required by each other, but do not actively release them, all of them can't move forward, resulting in endless blocking o ...

Singleton pattern is one of the simplest design patterns in Java. It means that a class always has only one instance during its running. We call it singleton pattern. It is not only used in practical work, but also one of the most frequently tested questions in interview. Through the singleton mode, we ...

Previous Binder mRemote's Past and Present PowerManger.isScreenOnThe calling process for () has already been called BinderProxy.transact(); /frameworks/base/core/java/android/os/Binder.java ------> Binder.java->BinderProxy public boolean transact(int code, Parcel data, Parcel reply, int flags) throws Remote ...

First of all, don't be afraid of some nouns. In fact, they are all reasonable things. The reference itself is well understood. The reference type data stores the memory address of the actual object. When garbage collection, it depends on whether the object has a reference. Java does not need developers to allocate memory and free memory, but it ...

Article Directory Dubbo Service Exposure and Service Consumption Principles (Based on Dubbo 2.6.5) Configuration parsing principles Based on XML Configuration Parsing Principle schema module description Configuration parsing principles based on annotations @EnableDubbo Role of ServiceAnnotationBe ...