Java development environment configuration under win7 and linux

1. Win7 configuration

First download the jdk that matches the operating system version, such as the latest jdk8:

Download link: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151 .html;

Of course, most developers don’t know the latest Jdk. Now the mainstream choices are jdk6 and jdk7. Of course, more and more developers are switching to the jdk8 platform.

After downloading, install it all the way. The local jdk installation path is C:Program FilesJavajdk1.7.0_79

Then follow the following steps, Computer--"Properties--"Advanced System Settings--"Environment Variables

In the xxx environment Variable (xxx represents your computer name) create a new JAVA_HOME (this name is customizable, but it is generally this), and enter the value

as shown in the figure.

Second step, find Path in the system variables below, edit, and add at the end:

%JAVA_HOME%bin;%JAVA_HOME%jrebin

Then create a new variable name CLASSPATH, and enter the value. ;%JAVA_HOME%lib;%JAVA_HOME%libdt.jar;%JAVA_HOME%libtools.jar, pay attention to that point! ! !

Click OK. Windows key + r, enter cmd

and then enter the command java -version. If you can see the java related version information, it means that the java environment variable is configured successfully.

2. Configuration of Linux environment variables

Linux and win7 are both multi-user operating systems, so the location where the environment variable is configured shows the scope of the environment variable.

As above, I configured win7 under user bai, so the java environment can only be used when user bai logs in. Other users will not be able to use it. Of course, if your configuration is on the system variable, then all users on this computer can use this environment. Once you are familiar with this concept, configuring environment variables on Linux is simple.

Linux and win7 are both multi-user operating systems, so the location where the environment variable is configured shows the scope of the environment variable.

As above, I configured win7 under user bai, so the java environment can only be used when user bai logs in. Other users will not be able to use it. Of course, if your configuration is on the system variable, then all users on this computer can use this environment. Once you are familiar with this concept, configuring environment variables on Linux is simple.

Step 1: Download

Download the linux version of jdk to /usr/local, and then unzip:

$ wget http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz
$ tar -zxvf jdk-8u66-linux-x64.tar.gz
$ mv jdk1.7.0_79 jdk1.7          # 重命名

Get the Jdk directory path /usr/local/jdk1.7

Step 2: Configure java for all users Environment

Log in to vim /etc/profile with root user

Press insert key, then move to the last line, add

#configuration java development enviroument
export JAVA_HOME=/usr/local/jdk1.7
export PATH=$JAVA_HOME/bin:$PATH 
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

Then press esc key, enter wq, after exiting, enter java -version if you can see it If you find the corresponding version information, it means that the Java environment variables are configured successfully.

Step 3: Configure the java environment for the current user

vim ~/.bash_profile file

Also add the following information:

#configuration java development enviroument
export JAVA_HOME=/usr/local/jdk1.7
export PATH=$JAVA_HOME/bin:$PATH 
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

Just log in again. These are two common methods.