WSL-Ubuntu18.04安装OpenJDK 14

• Java

  Java is a set of computer software and specifications developed by James Gosling at Sun Microsystems, which was later acquired by the Oracle Corporation, tha provides a system for developing application software and deploying it in a cross-platform computing environment.

  Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.

• Java virtual machine (JVM)

  A JVM is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode.

  The JVM reference implementation is developed by the OpenJDK project as open source code and includes a JIT compiler called HotSpot.

• JavaSE

  Java Platform, Standard Edition (Java SE) is a computing platform for development and deployment of portable code for desktop and server environments.

  The platform uses Java programming language and is part of the Java software-platform family.

• OpenJDK

  OpenJDK (Open Java Development Kit) is a free and open-source implementation of the Java Platform, Standard Edition (Java SE).

  It is the result of an effort SUn Microsystems began in 2006.

  OpenJDK is the official reference implementation of Java SE since version 7.

  The OpenJDK project produces a number of components: most importantly the virtual machine (HotSpot), the Java Class Library and the Java compiler (javac).

• Install OpenJDK14 on WSL with Ubuntu18.04

  OpenJDK下载地址

  《理解i586 vs x64》

  wget https://download.java.net/java/GA/jdk15.0.1/51f4f36ad4ef43e39d0dfdbaf6549e32/9/GPL/openjdk-15.0.1_linux-x64_bin.tar.gz 
  
  sudo mkdir /usr/java
  cd /usr/java
  sudo cp /data/openjdk-15.0.1_linux-x64_bin.tar.gz .
  sudo tar -xzvf openjdk-15.0.1_linux-x64_bin.tar.gz
  # now you have install the JDK to the path /usr/java/jdk-15.0.1
  
  sudo nano /etc/profile # 复制下述内容
  

  # OpenJDK 15.0.1
  JAVA_HOME=/usr/java/jdk-15.0.1
  PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
  export JAVA_HOME
  export PATH
  

  更多配置详情参见References1.

  最好在~/.bashrc也做上述修改。

• References

1. How To Install OpenJDK 14 On Ubuntu