The problem that the JDK set in JAVA_HOME does not appear even if java -version is performed at the command prompt

Prerequisites

PC environment

• Winsows10
• Java6(x64)

JAVA_HOME JDK does not appear even if java -version is done at the command prompt

As the title says, the solution is as follows.

Execute the following command

C:\Users\test>set JAVA_HOME
C:\Users\test>where java

If the following is displayed, a file with a name such as Java 6 Update 45 is installed, so uninstall it.

C:\Users\test>set JAVA_HOME
JAVA_HOME=C:\Program Files\Java\jdk1.7.0_21

C:\Users\test>where java
C:\Windows\System32\java.exe
C:\Program Files\Java\jdk1.7.0_21\bin\java.exe

When you restart your PC and execute the following command, C: \ Windows \ System32 \ java.exe should be deleted.

C:\Users\test>where java
C:\Program Files\Java\jdk1.7.0_21\bin\java.exe

Now when you run java -version, the JDK set in JAVA_HOME will be loaded correctly.

C:\Users\test>java -version
java version "1.7.0_21"
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

Supplement

Unless it is a major update such as language version upgrade after building the environment once You don't need to have the updater installed, as you probably won't update the JDK.

• Since there is a security problem, it is better to develop with the latest JDK if possible.

-Official Java 6 update finished -April 2013 Alert Regarding Critical Patch Update (Regular) of Oracle Java SE (JPCERT / CC)