How to Install Java Runtime Environment (JRE) in Ubuntu

最新推荐文章于 2022-09-06 19:28:26 发布

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#Ubuntu #Java #JDK #SUN #JVM

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本文详细介绍了如何在Ubuntu系统上使用apt-get命令安装Java JDK和JRE，包括查找当前JDK版本、下载必要文件及设置JAVA_HOME环境变量的方法。

1 ) Issue following command to find out current jdk version in apt-get

apt-cache search jdk
2 ) Install java JDK and JRE with apt-get install

apt-get install sun-java6-jdk sun-java6-jre
3 ) Ubuntu will auto download necessary file from web for installation.

Do you want to continue [Y/n]? y
Get:1 http://my.archive.ubuntu.com hardy/main java-common 0.28ubuntu3 [78.2kB]
Get:2 http://my.archive.ubuntu.com hardy/multiverse sun-java6-jre 6-06-0ubuntu1 [6334kB]
Get:3 http://my.archive.ubuntu.com hardy/main odbcinst1debian1 2.2.11-16build1 [66.2kB]
Get:4 http://my.archive.ubuntu.com hardy/main unixodbc 2.2.11-16build1 [289kB]
Get:5 http://my.archive.ubuntu.com hardy/multiverse sun-java6-bin 6-06-0ubuntu1 [27.3MB]
Get:6 http://my.archive.ubuntu.com hardy/multiverse sun-java6-jdk 6-06-0ubuntu1 [9625kB]
85% [6 sun-java6-jdk 3208002/9625kB 33%]

4) After installation done, jdk and jre will install at /usr/lib/jvm/java-6-sun-1.6.0.06

5) Ubuntu help to create a java symbolic link and put in /usr/bin for shortcut access

4 ) type java -version, DONE !!

Post-Installation Setup
Set JAVA_HOME into environment variable

Copy following statement and append to /etc/profile or .bashrc file, make system set JAVA_HOME into system environment variable.

export JAVA_HOME="/usr/lib/jvm/java-6-sun-1.6.0.06;"
P.S Please visit How to install JDK on Fedora Core, if you want to know how to install java jdk manually.