Java environment variable setting method
Configuring the JDK environment variable under Windows XP: (Windows7 similar)
1. Install the JDK, the installation process can customize the installation directory and other information, such as we choose the installation directory for D:\java\jdk1.5.0_08;
2. After the installation is complete, right-click on "My Computer" and click "Properties";
3. Select the "Advanced" tab and click on "Environment variables";
4. In "System Variables", set 3 properties, Java_home,path,classpath (case does not matter), if already exist then click "Edit", do not exist then click "New";
5.java_home indicates the JDK installation path, which is the path D:\java\jdk1.5.0_08 selected at the time of installation, including the Lib,bin,jre folder (this variable is best set, because later runs Tomcat,eclipse and so on need to depend on * this variable);
Path allows the system to identify Java commands under any path, set to:
%java_home%\bin;%java_home%\jre\bin
Classpath is the Java load class or lib path, only the class is in Classpath, the Java command is recognized, set to:
.; %java_home%\lib\dt.jar;%java_home%\lib\tools.jar
6. "Start"->; " Run, type "cmd";
7. Type the command "Java-version", "Java", "Javac" several commands, appear screen, indicating that the environment variable configuration is successful;
8. OK, finish the call. Start your first Java program.