Install JDK 6 update 29 in Ubuntu 11.10

Android编译需要安装sun-jdk，但新版本的Ubuntu已经在atp源中删除了了sun-jdk，可以添加老版本的apt源，或者手动安装jdk，步骤如下：

修改自：

http://diegobenna.blogspot.com/2011/01/install-jdk-6-update-21-in-ubuntu-1010.html

JDK (Java Development Kit) is a software that provides development tools for creating Java programs.

Installation

First we must download the package from the java website, select your platform, in our case Linux:

Here we go down the file "jdk-6u21-linux-x64.bin" to any folder, then leave where appropriate.

Now we have to give execute permissions:

sudo chmod +x jdk-6u29-linux-x64.bin

and install:

sudo ./jdk-6u29-linux-x64.bin

Now move the generated folder to a more appropriate directory:

sudo mv jdk1.6.0_29/ /usr/local

We set the new Java as one of the alternatives "java"

sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/jdk1.6.0_29/bin/java" 1

Now we set the "new alternative" as real Java. This step makes the sun is the version used by default:

sudo update-alternatives --set java /usr/local/jdk1.6.0_29/bin/java

Now we do the same steps above for javac:

sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/jdk1.6.0_29/bin/javac" 1

sudo update-alternatives --set javac /usr/local/jdk1.6.0_29/bin/javac

for jar:

sudo update-alternatives --install "/usr/bin/jar" "jar" "/usr/local/jdk1.6.0_29/bin/jar" 1

sudo update-alternatives --set jar /usr/local/jdk1.6.0_29/bin/jar

for javah:

sudo update-alternatives --install "/usr/bin/javah" "javah" "/usr/local/jdk1.6.0_29/bin/javah" 1

sudo update-alternatives --set javah /usr/local/jdk1.6.0_29/bin/javah

for javadoc

sudo update-alternatives --install "/usr/bin/javadoc" "javadoc" "/usr/local/jdk1.6.0_29/bin/javadoc" 1

sudo update-alternatives --set javadoc /usr/local/jdk1.6.0_29/bin/javadoc

Now verify that everything works properly. Open the console and type:

java -version

If all is well, you should return the following:

java version "1.6.0_29"

Java (TM) SE Runtime Environment (build 1.6.0_29-B06)

Java HotSpot (TM) Client VM (build 17.0-b16, mixed mode, sharing)

For javac:

javac -version

If all is well back:

javac 1.6.0_29

If you have other installations of java / javac can be configured using the following commands:

sudo update-alternatives --config java

sudo update-alternatives --config javac

Also if you want setear JRE_HOME JAVA_HOME or as environment variables, we must go to:

sudo gedit /etc/environment

Here we record the routes where we have installed Java, in our case is as follows:

JAVA_HOME = "/usr/local/jdk1.6.0_29/bin/" (add)

JRE_HOME = "/usr/local/jdk1.6.0_29/jre" (add)

PATH ="...(other routes):$JAVA_HOME:$JRE_HOME (edit)

With this we finish the installation.