How to install Sun JDK on Ubuntu
sudo apt-get install sun-java6-bin sun-java6-jre sun-java6-jdk
sudo update-java-alternatives -s java-6-sun
You also need to edit a file called /etc/jvm. This file defines the default system JVM search order. Each JVM should list their JAVA_HOME compatible directory in this file. The default system JVM is the first one available from top to bottom. Open /etc/jvm
$ sudo vi /etc/jvm
Make sure /usr/lib/jvm/java-6-sun is added to the top of JVM list
/usr/lib/jvm/java-6-sun
At the end your file should read as follows:
/usr/lib/jvm/java-6-sun /usr/lib/jvm/java-gcj /usr/lib/jvm/ia32-java-1.5.0-sun /usr/lib/jvm/java-1.5.0-sun /usr
Save and close the file.
Setup the environment variable
You also need to setup JAVA_HOME and PATH variable. Open your $HOME/.bash_profile or /etc/profile (system wide) configuration. Open your .bash_profile file:
$ vi $HOME/.bash_profile
Append following line:
export JAVA_HOME=/usr/lib/jvm/java-6-sun export PATH=$PATH:$JAVA_HOME/bin
Save and close the file.
Test your new JDK
Type the following command to display version:
$ java -version
Output:
java version "1.6.0_03" Java(TM) SE Runtime Environment (build 1.6.0_03-b05) Java HotSpot(TM) Server VM (build 1.6.0_03-b05, mixed mode)
Try HelloWorld.java - first java program
$ vi HelloWorld.java
Append code:
public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } }
Save and close the file. Compile HelloWorld.java and execute program by typing following two instructions:
$ javac HelloWorld.java $ java HelloWorld
Output:
Hello, World!
Что это - манера автора выражать свои мысли через негативную лексику? Или, может быть, следствие избирательности памяти, которая выражается в вытеснении негативного опыта?
