如何安装openjdk-18？

Question

我正试图在Linux上优化“我的世界”，它说要获得最新的OpenJDK JRE。

我目前的设置是：

$ sudo update-alternatives --config java                                                                                                   
There is only one alternative in link group java (providing /usr/bin/java): /usr/lib/jvm/java-11-openjdk-amd64/bin/java
Nothing to configure.
$ uname -m                                                                                                                                
x86_64
$ lsb_release -a                                                                                                                          
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.4 LTS
Release:    20.04
Codename:   focal
$ lspci | grep VGA                                                                                                                        
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09)

当我试图安装OpenJDK-18JRE时，我得到的是一个错误：

$ sudo apt install -y openjdk-18-jre                                                                                                      
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package openjdk-18-jre

当我试图搜索apt缓存时，我只找到：

apt-cache search openjdk                                                                                                                
default-jdk - Standard Java or Java compatible Development Kit
default-jdk-doc - Standard Java or Java compatible Development Kit (documentation)
default-jdk-headless - Standard Java or Java compatible Development Kit (headless)
default-jre - Standard Java or Java compatible Runtime
default-jre-headless - Standard Java or Java compatible Runtime (headless)
openjdk-11-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-11-doc - OpenJDK Development Kit (JDK) documentation
openjdk-11-jdk - OpenJDK Development Kit (JDK)
openjdk-11-jdk-headless - OpenJDK Development Kit (JDK) (headless)
openjdk-11-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-11-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-11-source - OpenJDK Development Kit (JDK) source files
crypto-policies - unify the crypto policies used by different applications and libraries
jtreg - Regression Test Harness for the OpenJDK platform
libhsdis0-fcml - HotSpot disassembler plugin using FCML
libjax-maven-plugin - Using the xjc goal with OpenJDK 11+
libreoffice - office productivity suite (metapackage)
openjdk-11-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-11-jre-dcevm - Alternative VM for OpenJDK 11 with enhanced class redefinition
openjdk-11-jre-zero - Alternative JVM for OpenJDK, using Zero
openjdk-8-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-8-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-8-doc - OpenJDK Development Kit (JDK) documentation
openjdk-8-jdk - OpenJDK Development Kit (JDK)
openjdk-8-jdk-headless - OpenJDK Development Kit (JDK) (headless)
openjdk-8-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-8-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-8-jre-zero - Alternative JVM for OpenJDK, using Zero/Shark
openjdk-8-source - OpenJDK Development Kit (JDK) source files
uwsgi-app-integration-plugins - plugins for integration of uWSGI and application
uwsgi-plugin-jvm-openjdk-11 - Java plugin for uWSGI (OpenJDK 11)
uwsgi-plugin-jwsgi-openjdk-11 - JWSGI plugin for uWSGI (OpenJDK 11)
uwsgi-plugin-ring-openjdk-11 - Closure/Ring plugin for uWSGI (OpenJDK 11)
uwsgi-plugin-servlet-openjdk-11 - JWSGI plugin for uWSGI (OpenJDK 11)
java-package - Utility for creating Java Debian packages
openjdk-13-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-13-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-13-doc - OpenJDK Development Kit (JDK) documentation
openjdk-13-jdk - OpenJDK Development Kit (JDK)
openjdk-13-jdk-headless - OpenJDK Development Kit (JDK) (headless)
openjdk-13-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-13-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-13-jre-zero - Alternative JVM for OpenJDK, using Zero
openjdk-13-source - OpenJDK Development Kit (JDK) source files
openjdk-16-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-16-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-16-doc - OpenJDK Development Kit (JDK) documentation
openjdk-16-jdk - OpenJDK Development Kit (JDK)
openjdk-16-jdk-headless - OpenJDK Development Kit (JDK) (headless)
openjdk-16-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-16-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-16-jre-zero - Alternative JVM for OpenJDK, using Zero
openjdk-16-source - OpenJDK Development Kit (JDK) source files
openjdk-17-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-17-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-17-doc - OpenJDK Development Kit (JDK) documentation
openjdk-17-jdk - OpenJDK Development Kit (JDK)
openjdk-17-jdk-headless - OpenJDK Development Kit (JDK) (headless)
openjdk-17-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-17-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-17-jre-zero - Alternative JVM for OpenJDK, using Zero
openjdk-17-source - OpenJDK Development Kit (JDK) source files
postgresql-10-pljava - Java procedural language for PostgreSQL 10
postgresql-11-pljava - Java procedural language for PostgreSQL 11
postgresql-12-pljava - Java procedural language for PostgreSQL 12
postgresql-13-pljava - Java procedural language for PostgreSQL 13
postgresql-14-pljava - Java procedural language for PostgreSQL 14
postgresql-9.5-pljava - Java procedural language for PostgreSQL 9.5
postgresql-9.6-pljava - Java procedural language for PostgreSQL 9.6

我可能只需要安装openjdk-17-jre，但是现在这真的让我很困扰，因为我可以在这里看。

如果有人在乎“我的世界”发射器说我在“我的世界”

我所遵循的指南：

• 如何在Ubuntu22.04上使用Apt安装Java
• 如何在Linux上安装和优化“我的世界”：8个关键步骤

Answer 1

您可以下载并安装在/opt/中，这样它就不会干扰当前安装的版本。命令：

下载：

wget https://download.java.net/java/GA/jdk18/43f95e8614114aeaa8e8a5fcf20a682d/36/GPL/openjdk-18_linux-x64_bin.tar.gz

解压缩下载(将{version}替换为下载的版本)：

tar -xvf openjdk-18._linux-{version}

移动到/opt/：

sudo mv jdk-18* /opt/

(如果需要，请将jdk-18替换为其他内容)，并设置环境变量：

export JAVA_HOME=/opt/jdk-18
export PATH=$PATH:$JAVA_HOME/bin

为了检查这是否正确：

cd /opt/jdk-18/
java --version
echo $JAVA_HOME

通过重新执行导出以排除/opt/jdk-18，您将恢复旧的情况。