1. JDK installation:
1. Download the Linux self-extracting file jdk-6u4-linux-i586.bin of JDK 6.0.4 from the sun site;
2. install and configure
CD/usr/local/lib
Sudo CP/home/jdk-6u4-linux-i586.bin ./
Sudo chmod + x jdk-6u4-linux-i586.bin
Sudo./jdk-6u4-linux-i586.bin
After the last command is executed, a "JDK 1.6.0 _ 04" directory is added under the current directory, which is all the files of JDK after the jdk-6u4-linux-i586.bin is decompressed;
2.2. Install configurations
CD/usr/local/lib
Sudo CP/home/jdk-6u4-linux-i586.bin ./
Sudo chmod + x jdk-6u4-linux-i586.bin
Sudo./jdk-6u4-linux-i586.bin
After the last command is executed, a "JDK 1.6.0 _ 04" directory is added under the current directory, which is all the JDK files after the jdk-6u4-linux-i586.bin is decompressed;
Unununtu itself carries the JVM Implementation of gij, so when you input "Java-version" in terminal, it will display:
Java version "1.5.0"
Gij (GNU libgcj) version 4.2.1 (Ubuntu 4.2.1-5ubuntu5)
. That is, there are two JVM implementations in the system, and gij JVM is also used by other Ubuntu tools or software. In this case, you must use the "Update-alternatives" tool provided by Debian to complete the process. Program Multiple versions are available:
Sudo Update-alternatives -- display Java
The system only lists gij JVM, because JDK 6 is manually decompressed and installed.
Enter the following two lines:
Sudo Update-alternatives -- install/usr/bin/Java/usr/local/lib/jdk1.6.0 _ 04/bin/Java 60
Sudo Update-alternatives -- install/usr/bin/Java/usr/bin/gij-4.2 40
Note that 60 and 40 at the end of 1 or 2 rows are the priority. Now, JDK 6 is set as the first choice;
Input: ls-L/etc/alternatives/Java. The JVM has pointed to the decompressed directory of JDK 6:
Lrwxrwxrwx 1 Root 35 2008-01-25/etc/alternatives/Java->/usr/local/lib/jdk1.6.0 _ 04/bin/Java
CD/usr/bin
Sudo CP Java. Bak
Sudo ln-SF/etc/alternatives/Java
Run the following command again:
Java-version
Java version "1.6.0 _ 04 ″
Java (TM) se Runtime Environment (build 1.6.0 _ 04-b12)
Java hotspot (TM) Client VM (build 10.0-b19, mixed mode, sharing)
To change the JVM implementation, enter:
Sudo Update-alternatives -- config Java
Configuration;
3. Set Environment Variables
Add the following content to/etc/profile:
Java_home =/usr/local/lib/jdk1.6.0 _ 04
Jre_home =/usr/local/lib/jdk1.6.0 _ 04/JRE
Classpath =.: $ java_home/lib: $ jre_home/lib
Export java_home jre_home classpath
Okey. JDK installation and configuration are complete.
2. Install Eclipse:
Download and decompress eclipse, and then
Add the eclipse link to Applications> programming:
Right-click applications, select Edit menus, select programming in the list on the left, and click new item. Type: application; Name: eclipse; command:/home/[your account name]/bin/Eclipse/eclipse
After saving, eclipse is installed.
If you are prompted that the Java VM (visual machine) is not found, enter the following in the terminal:
Ln-S $ jre_home ~ /Bin/Eclipse/JRE
