Java (Ubuntu)

Akutelle Java-Version prüfen:

java -version

Java herunterladen:

• JRE: http://java.com/de/download/linux_manual.jsp
• JDK: http://www.oracle.com/technetwork/java/javase/downloads/index.html

Installation

Falls folgendes Verzeichnis nicht existiert, dann dieses anlegen:

sudo mkdir /opt/Oracle_Java/

wget download.oracle.com/otn-pub/java/jdk/8u92-b14/jdk-8u92-linux-x64.tar.gz
tar -xzf jdk-8u92-linux-x64.tar.gz
sudo mv jdk1.8.0_92/ /opt/Oracle_Java/
sudo chown -R root:root /opt/Oracle_Java/jdk1.8.0_92/

Alternativen-System einrichten:

sudo update-alternatives --install "/usr/bin/java" "java" "/opt/Oracle_Java/jdk1.8.0_92/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/opt/Oracle_Java/jdk1.8.0_92/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/opt/Oracle_Java/jdk1.8.0_92/bin/javaws" 1
sudo update-alternatives --install "/usr/bin/jar" "jar" "/opt/Oracle_Java/jdk1.8.0_92/bin/jar" 1 

Alternativen-System konfigurieren:

sudo update-alternatives --set "java" "/opt/Oracle_Java/jdk1.8.0_92/bin/java"
sudo update-alternatives --set "javac" "/opt/Oracle_Java/jdk1.8.0_92/bin/javac"
sudo update-alternatives --set "javaws" "/opt/Oracle_Java/jdk1.8.0_92/bin/javaws"
sudo update-alternatives --set "jar" "/opt/Oracle_Java/jdk1.8.0_92/bin/jar" 

Links

https://wiki.ubuntuusers.de/Java/Installation/Oracle_Java/Java_8/#Java-8-JRE

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