Java's ubuntu12.04 development environment preparation

Configure the Java development environment, which is to install the JDK:

1, configuration environment variables, change/etc/profile file: sudo gedit/etc/profile;

At the end of the file add the following lines (in fact, the same as the configuration principle under Windows, but the expression is different):

Export java_home=/usr/java/jdk1.8.0_25
Export path= $JAVA _home/bin: $JAVA _home/jre/bin: $PATH
Export classpath= $CLASSPATH:.: $JAVA _home/lib: $JAVA _home/jre/lib

2. Change the default configuration option and execute the following command sequentially

Without step 2, step 1 is only the environment variable that configures the JDK for the current user

sudo update-alternatives--install/usr/bin/java Java/usr/java/jdk1.8.0_25/bin/java 300
sudo update-alternatives--install/usr/bin/jar Jar/usr/java/jdk1.8.0_25/bin/jar 300
sudo update-alternatives--install/usr/bin/javah javah/usr/java/jdk1.8.0_25/bin/javah 300
sudo update-alternatives--install/usr/bin/javap JAVAP/USR/JAVA/JDK1.8.0_25/BIN/JAVAP 300

3. Test Run Java-version

The installation succeeds as follows:

Java Version "1.7.0_07"
Java (TM) SE Runtime Environment (build 1.7.0_07-B10)
Java HotSpot (TM) Server VM (build 23.3-b01, Mixed mode)

Finally, configure eclipse (the following)

sudo gedit /usr/share/applications/eclipse.desktop

Fill in the text:

[Desktop Entry]
Name=Eclipse
Comment=Eclipse IDE
Exec=/Opt/Eclipse/eclipse
icon=/opt/eclipse/ ICON.XPM
terminal=false
type=application
categories=application;development;

Then go to the/opt/directory to build Eclipse's shortcut desktop (same as Windows).

It is recommended to pin it directly to the starter.

Java's ubuntu12.04 development environment preparation