Windows installs two types of JDK at the same time

Install jdk1.8 and jdk1.7 at the same time because of some need

Because the computer once installed jdk1.8, and the environment variables have been set. Later, the newly added jdk1.7

A problem occurred:

First installed 1.8, then installed 1.7, also in the environment variable 1.7

Java_home:c:\program files\java\jdk1.7.0_51

ClassPath:.; %java_home%\lib;%java_home%\lib\tools.jar

Path:%java_home%\bin;%java_home%\jre\bin;

Then execute in cmd: Java-version is still showing the original jdk1.8 version

The change method is to put the configuration information in path Java_home in the first place.

Re-executing java-version in cmd shows the Java version "1.7.0_51"

Windows installs two types of JDK at the same time