ubuntu11.0 安装JDK
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Install the JDK
- Download he 32bit or 64bit Linux "compressed binary file" - it has a ".tar.gz" file extension i.e. "[java-version]-i586.tar.gz" for 32bit and "[java-version]-x64.tar.gz" for 64bit
Uncompress it
tar -xvf jdk-7u2-linux-i586.tar.gz (32bit)
tar -xvf jdk-7u2-linux-x64.tar.gz (64bit)
Uncompress it
tar -xvf jdk-7u2-linux-i586.tar.gz (32bit)
tar -xvf jdk-7u2-linux-x64.tar.gz (64bit)
JDK 7 package is extracted into ./jdk1.7.0_02 directory.- Now move the JDK 7 directory to/usr/lib
sudo mv ./jdk1.7.0_02 /usr/lib/jvm/jdk1.7.0
- Now run
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0/bin/java" 1sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0/bin/javac" 1sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.7.0/bin/javaws" 1
- Run
sudo update-alternatives --config java
You will see output similar one below - choose the number of jdk1.7.0 - for example3 in this list:
$sudo update-alternatives –config javaThere are 3 choices for the alternative java (providing /usr/bin/java).Selection Path Priority Status————————————————————* 0 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 auto mode1 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual mode2 /usr/lib/jvm/java-6-sun/jre/bin/java 63 manual mode3 /usr/lib/jvm/jdk1.7.0/jre/bin/java 3 manual modePress enter to keep the current choice[*], or type selection number: 3update-alternatives: using /usr/lib/jvm/jdk1.7.0/jre/bin/java to provide /usr/bin/java (java) in manual mode.
Check the version of you new JDK 7 installation:
java -version
java version “1.7.0”Java(TM) SE Runtime Environment (build 1.7.0-b147)Java HotSpot(TM) Client VM (build 21.0-b17, mixed mode)
Repeat the above for:
sudo update-alternatives --config javacsudo update-alternatives --config javaws
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