Windows installation

Since the acquisition of Java by Oracle, new versions of Java under Windows are installed only. No ZIP installation free.

The Windows installer has one downside

  1. Can write the registry
  2. Java. Exe,javaw.exe, etcC:\Windows\System32orC:\Windows\SysWOW64
  3. Will periodically update the program setting boot automatically, found the new version pop-up prompt
  4. Will be inPATHWrite an Oracle javapath, will addjre\bin

The advantage is that it is easy to install

JAVA_HOME%\bin; JAVA_HOME%\bin; JAVA_HOME%\bin; A %JAVA_HOME%\jre\bin; And that led to a really weird mistake.

Now, how to avoid installation

From www.oracle.com/technetwork… Download the latest JDK for Windows installation: JDK – 8U131-Windows-x64.exe

Use the decompression software to unzip to E:\ jdK-8u131-windows-x64 \ Win+R-> CMD to open the command line

cd /d E:\jdk- 8 -u131-windows-x64\.rsrc\1033\JAVA_CAB10
extrac32.exe 111:: Decompress the tools.zip file :: Open the current folder Explorer. Exe. :: Decompress tools.zip to the current folder.`E:\jdk-8u131-windows-x64\.rsrc\1033\JAVA_CAB10\tools`:: Change the.pack file to a. Jar file CD toolsfor /r %x in (*.pack) do .\bin\unpack200 -r "%x" "%~dx%~px%~nx.jar":: Decompress src.zip. If you don't need the source code, skip this step. \.. \JAVA_CAB9 extrac32110:: Move src.zip to the Tools folder move src.zip.. \JAVA_CAB10\tools\ :: copy the contents of the tools folder to the specified directory, e.g. D:\ JDK xcopy /s /e/I /y e :\ JDK- 8 -u131-windows-x64\.rsrc\1033\JAVA_CAB10\tools d:\ JDK :: Delete E:\ JDK- 8 -U131-windows-x64 folder CD / &&rd /s /q E:\ JDK- 8 -u131-windows-x64Copy the code

Set the environment variable to add JAVA_HOME D :\ JDK

Change the PATH

Additional; %JAVA_HOME%\bin;

Add the CLASSPATH

.; %JAVA_HOME%\lib\dt.jar; %JAVA_HOME%\lib\tools.jar;

After setting the environment variables, you need to reopen CMD

java -version && javac -version
java version "1.8.0 comes with _131"
Java(TM) SE Runtime Environment (build 1.8. 0_131-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b15, mixed mode)
javac 1.8. 0_131Copy the code

Linux installation


# Download file
$ wget -P ~/downloads --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-x64.tar.gz

# decompression
$ sudo tar zxf ~/downloads/jdk-*.tar.gz -C /usr/local/

Create a soft connection
$ sudo ln -sf /usr/local/ jdk1.8.0 _121 / usr /local/jdk

$ sudo vi /etc/profile

Set up the Java environment
export JAVA_HOME=/usr/local/jdk
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar; :$JAVA_HOME/lib/tools.jar:$CLASSPATH
export PATH=$JAVA_HOME/bin:$PATH

# Save and exit

# Make the configuration take effect
$ source /etc/profileCopy the code

My original

Blog anjia. Ml / 2017/05/17 /… Jane books www.jianshu.com/p/5dc20d5d4… The nuggets juejin. Cn/post / 684490…