Installing JDK and Eclipse under Linux

Installation steps:

(1) Download JDK

(jdk-8u20-linux-x64.tar.gz)

(2) Uninstalling the system's own open source JDK

Rpm-qa |grep Java

Rpm–e Java

(3) Copy the installation files to the user directory

For example:

Under the/opt/java directory

(4) Unzip the file

TAR–XZVF jdk-8u20-linux-x64.tar.gz

After decompression, in the/opt/java directory will generate a new directory jdk1.8.0_20, which is stored in the extracted files.

At this point, the installation is basically done, and here are the settings for the environment variable.

Note: If the file you downloaded is in RPM format, you can install it by using the following command:

RPM-IVH jdk-8u20-linux-x64.rpm

(5) Environment variable setting

There are 2 ways to configure the environment variables:

① modify the. bashrc file or the. bash_profile file, add the following statement to the file:

Export JAVA_HOME=/OPT/JAVA/JDK1.8.0_20

Export path= $PATH: $HOME/bin: $JAVA _home/bin: $JAVA _home/jre/bin

Export classpath=.: $JAVA _home/lib: $JAVA _home/jre/lib

Ii

Modify the. Profile file (this is recommended so that other programs can also use the JDK in a friendly way)

Vi/etc/profile

Locate the export PATH USER LOGNAME MAIL HOSTNAME histsize INPUTRC in the file, and change to the following form:

Export JAVA_HOME=/OPT/JAVA/JDK1.8.0_20

Export path= $PATH: $JAVA _home/bin: $JAVA _home/jre/bin

Export classpath=.: $JAVA _home/lib: $JAVA _home/jre/lib

(6) Make the environment variable effective

Execute the configuration file to make it effective immediately

Source/etc/profile

Then execute the following command to verify that the installation is successful

Java-version

If the following message appears, the installation is successful

------------------------------------------------------------------------------------

1.

Useradd Eclipse:eclipse

passwd Eclipse

2.

MV eclipse-jee-indigo-sr2-linux-gtk.tar.gz/opt/

3.

Su-eclpse

TAR-XZVF eclipse-standard-luna-r-linux-gtk-x86_64.tar.gz

4.

VI. bash_profile

Export JAVA_HOME=/OPT/JAVA/JDK1.8.0_20

Export path= $PATH: $JAVA _home/bin: $JAVA _home/jre/bin

Export classpath=.: $JAVA _home/lib: $JAVA _home/jre/lib

source. bash_profile

5.

/opt/eclipse/eclipse

6.

Export display=172.16.0.1:0.0

/opt/eclipse/eclipse

Installing JDK and Eclipse under Linux