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JDK installation hints

The JDK installs either OpenJDK or OracleJDK. Here, we will show you how to install in the following environment.

Ubuntu 14.04

OpenJDK7

It can be installed with apt-get.

 $ sudo apt-get install openjdk-7-jdk

Confirmation of JDK

 $ java -version
 java version "1.7.0_75"
 OpenJDK Runtime Environment (IcedTea 2.5.4) (7u75-2.5.4-1~trusty1)
 OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)

Here, when the version is displayed for "1.6.0_xx", change it to use JDK 7. This switching is done with the update-alternatives command.

 $ sudo update-alternatives --config java
 alternative java (provides /usr/bin/java) has 2 choices.
   Option         path                                         priority      status
 -------------------------------------------------------------------------------------
 * 0            /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java   1061      auto mode
   1            /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java   1061      manual mode
   2            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1051      manual mode
 Press Enter to keep the current selection [*], otherwise press the key of the choice: 2
Since JDK 7 is used, specify the number "2". After this operation, check the JDK with java -version.

oracleJDK7

Add the repository and install oracleJDK7.

 $ sudo add-apt-repository ppa:webupd8team/java
 $ sudo apt-get update
 $ sudo apt-get install oracle-jdk7-installer

Confirmation of JDK

 $ java -version
 java version "1.7.0_76"
 Java(TM) SE Runtime Environment (build 1.7.0_76-b13)
 Java HotSpot(TM) 64-Bit Server VM (build 24.76-b04, mixed mode)

If you also have OpenJDK installed, you can check the selection status below.

 $ update-alternatives --config java
 alternative java (provides /usr/bin/java) has 2 choices.
      Option         path                                         priority      status
 -------------------------------------------------------------------------------------
 * 0            /usr/lib/jvm/java-7-oracle/jre/bin/java          1072      auto mode
   1            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      manual mode
   2            /usr/lib/jvm/java-7-oracle/jre/bin/java          1072      manual mode
 Press Enter to keep the current selection [*], otherwise press the key of the choice:


Debian 7.0 Wheezy

OpenJDK7

For the procedure, refer to Ubuntu 14.04 above. It can be set by the same procedure.

oracleJDK7 (Method using java-package: corresponding from Debian 7.0)

Follow the instructions on the right to install. https://wiki.debian.org/JavaPackage

Add the following sentence to the end of /etc/apt/sources.list.

 deb http://http.debian.net/debian/ wheezy main contrib

Install the required java-package to install the JDK.

 # apt-get update
 # apt-get install java-package

Download the JDK (here jdk-7u75-linux-x64.tar.gz) from the oracle site.
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

Generate and install the deb package.

 $ make-jpkg jdk-7u75-linux-x64.tar.gz
 $ ls
 oracle-j2sdk1.7_1.7.0+update75_amd64.deb
 # dpkg -i oracle-j2sdk1.7_1.7.0+update75_amd64.deb

Select oracleJDK.

 # update-alternatives --config java
 alternative java (provides /usr/bin/java) has 3 choices.
 Alternative java (provides /usr/bin/java) has 3 choices.
      Option         path                                         priority      status
 -------------------------------------------------------------------------------------
   0            /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java   1061      auto mode
   1            /usr/lib/jvm/j2sdk1.7-oracle/jre/bin/java        317       manual mode
   2            /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java   1061      manual mode
 * 3            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1051      manual mode
 Press Enter to keep the current selection [*], otherwise press the number of the choice: 1

Confirmation of JDK

 $ java -version
 java version "1.7.0_75"
 Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
 Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)

Debian 6.0 Squeeze

OpenJDK7

Add the wheezy repository to the end of /etc/apt/sources.list.

 # vi /etc/apt/sources.list
 deb http://ftp.jp.debian.org/debian/ wheezy main

Since it was added only for the installation of openjdk 7, the priority is the sqeeze version, so create a local file in / etc / apt / apt.conf.d and write the following.

 # vi /etc/apt/apt.conf.d/local
 APT::Default-Release "squeeze";

On the other hand, the priority of the package included in wheezy is kept to a minimum. In the squeeze environment, we want to avoid having to upgrade major libraries unnecessarily.
Create a wheezy file in /etc/apt/preferences.d and write the following.

 # vi /etc/apt/preferences.d/wheezy
 Package: *
 Pin: release n=wheezy
 Pin-Priority: 10

For priority, 100 is allocated to the package being installed, 500 is allocated to the package not installed, so specify a value smaller than 100.

 # apt-get update
 # apt-get install -t wheezy openjdk-7-jdk

Select OpenJDK 7.

 # update-alternatives --config java
 alternative java (provides /usr/bin/java) has 3 choices.
   Option         path                                         priority      status
 -------------------------------------------------------------------------------------
 * 0            /usr/lib/jvm/java-6-openjdk/jre/bin/java         1061      auto mode
   1            /usr/bin/gij-4.7                                 1047      manual mode
   2            /usr/lib/jvm/java-6-openjdk/jre/bin/java         1061      manual mode
   3            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1051      manual mode
 Press Enter to keep the current selection [*], otherwise press the number of the choice: 3

Confirmation of JDK

 # java -version
 java version "1.7.0_03"
 OpenJDK Runtime Environment (IcedTea7 2.1.7) (7u3-2.1.7-1)
 OpenJDK 64-Bit Server VM (build 22.0-b10, mixed mode)

Reference site (external site):


oracleJDK 7 (How to install with update-alternatives)

Debian 6.0 does not support java-package, so install it with update-alternatives.

Download the JDK (here jdk-7u75-linux-x64.tar.gz) from the oracle site.
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

Unzip it and move the generated directory jdk1.7.0_75 to /usr/lib.

 # tar xvzf jdk-7u75-linux-x64.tar.gz
 # mv jdk1.7.0_75 /usr/lib/jvm/jdk1.7.0-oracle

Install with the update-alternatives command. At this time, the priority is specified, but here it is 1.

 # update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0-oracle/bin/java" 1
 # update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0-oracle/bin/javac" 1

Select oracleJDK.

 # update-alternatives --config java
 There are four choices in alternative java (providing /usr/bin/java).
   Option         path                                         priority      status
 -------------------------------------------------------------------------------------
   0            /usr/lib/jvm/java-6-openjdk/jre/bin/java         1061      auto mode
   1            /usr/bin/gij-4.7                                 1047      manual mode
   2            /usr/lib/jvm/java-6-openjdk/jre/bin/java         1061      manual mode
 * 3            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1051      manual mode
   4            /usr/lib/jvm/jdk1.7.0-oracle/bin/java            1         manual mode
 Press Enter to hold the current selection [*], otherwise press the number of the choice: 4

Confirmation of JDK

 $ java -version
 java version "1.7.0_75"
 Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
 Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)


Reference site (external site):


Fedora 20

OpenJDK7

It is already installed.

 $ java -version
 java version "1.7.0_75"
 OpenJDK Runtime Environment (fedora-2.5.4.2.fc20-x86_64 u75-b13)
 OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)

oracleJDK7

Download the JDK (jdk-7u75-linux-x64.rpm in this case) from the oracle site.
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

Installation

 # rpm -ivh jdk-7u75-linux-x64.rpm

Confirm installation destination

 # ls -l /usr/java/
 lrwxrwxrwx. 1 root root   16  3月 17 10:47 default -> /usr/java/latest
 drwxr-xr-x. 8 root root 4096  3月 17 10:46 jdk1.7.0_75
 lrwxrwxrwx. 1 root root   21  3月 17 10:47 latest -> /usr/java/jdk1.7.0_75

Register oracleJDK to alternatives. At this time, if you use the /usr/java/latest path from the installation above, you can see that it does not depend on the JDK version number.
Before registering, check the Java settings.

 # update-alternatives --display java
 java - The status is manual.
 The link now points to /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/java.
 /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/java - Priority item 170075
  Slave keytool: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/keytool
  Slave orbd: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/orbd
  Slave pack200: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/pack200
  Slave rmid: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/rmid
  Slave rmiregistry: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/rmiregistry
  Slave servertool: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/servertool
  Slave tnameserv: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/tnameserv
  Slave unpack200: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/unpack200
  Slave jre_exports: /usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64
  Slave jre: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre
  Slave java.1.gz: /usr/share/man/man1/java-java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64.1.gz
  Slave keytool.1.gz: /usr/share/man/man1/keytool-java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64.1.gz
  Slave orbd.1.gz: /usr/share/man/man1/orbd-java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64.1.gz
  Slave pack200.1.gz: /usr/share/man/man1/pack200-java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64.1.gz
  Slave rmid.1.gz: /usr/share/man/man1/rmid-java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64.1.gz
  Slave rmiregistry.1.gz: /usr/share/man/man1/rmiregistry-java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64.1.gz
  Slave servertool.1.gz: /usr/share/man/man1/servertool-java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64.1.gz
  Slave tnameserv.1.gz: /usr/share/man/man1/tnameserv-java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64.1.gz
  Slave unpack200.1.gz: /usr/share/man/man1/unpack200-java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64.1.gz

The above result shows that orbd is registered as a slave. When invoking the name server, the path must be passed to orbd. The slave specifies what you want to switch with java installed with update-alternatives - install. Therefore, when registering oracleJDK to alternatives, we also specify with --slave option.
Also, the priority item 170075 is priority. update-alternatives --install Specify the priority when running. Since the version of OpenJDK 7 and orcleJDK 7 is the same this time, we will specify 170075 as the priority when registering oracleJDK 7.

For these reasons, register with the following settings.

 # update-alternatives --install /usr/bin/java java /usr/java/latest/bin/java 170075 
   --slave /usr/bin/javac javac /usr/java/latest/bin/javac 
   --slave /usr/bin/javaws javaws /usr/java/latest/bin/javaws 
   --slave /usr/bin/keytool keytool /usr/java/latest/bin/keytool 
   --slave /usr/bin/orbd orbd /usr/java/latest/bin/orbd 
   --slave /usr/bin/pack200 pack200 /usr/java/latest/bin/pack200 
   --slave /usr/bin/rmid rmid /usr/java/latest/bin/rmid 
   --slave /usr/bin/rmiregistry rmiregistry /usr/java/latest/bin/rmiregistry 
   --slave /usr/bin/servertool servertool /usr/java/latest/bin/servertool 
   --slave /usr/bin/tnameserv tnameserv /usr/java/latest/bin/tnameserv 
   --slave /usr/bin/unpack200 unpack200 /usr/java/latest/bin/unpack200

Select oracleJDK.

 # update-alternatives --config java
 There are 2 programs and provide 'java'.
    Selection command
 -----------------------------------------------
 *+ 1           /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75-2.5.4.2.fc20.x86_64/jre/bin/java
    2           /usr/java/latest/bin/java
 Press Enter to hold the current selection [+] or enter the selection number: 2

Confirmation of JDK

 # java -version
 java version "1.7.0_75"
 Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
 Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)

Reference site (external site):

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