Eu pesquisei askubuntu e tentei as sugestões, mas falhei. Eu tentei esta pergunta: Como desinstalar completamente o Java?
1.Eu corro sudo apt-cache search openjdk obtenho o seguinte:
openjdk-6-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-6-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-6-doc - OpenJDK Development Kit (JDK) documentation
openjdk-6-jdk - OpenJDK Development Kit (JDK)
openjdk-6-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-6-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-6-jre-lib - OpenJDK Java runtime (architecture independent libraries)
openjdk-6-source - OpenJDK Development Kit (JDK) source files
icedtea-7-jre-jamvm - Alternative JVM for OpenJDK, using JamVM
openjdk-6-jre-zero - Alternative JVM for OpenJDK, using Zero/Shark
openjdk-7-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-7-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-7-doc - OpenJDK Development Kit (JDK) documentation
openjdk-7-jdk - OpenJDK Development Kit (JDK)
openjdk-7-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-7-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-7-jre-lib - OpenJDK Java runtime (architecture independent libraries)
openjdk-7-jre-zero - Alternative JVM for OpenJDK, using Zero/Shark
openjdk-7-source - OpenJDK Development Kit (JDK) source files
2. execute sudo apt-get remove openjdk obtenha o seguinte:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package openjdk-7-jdk is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 182 not upgraded.
Você não pode remover o OpenJDK 7 porque não está instalado . Se você estiver tentando remover o OpenJDK 6, tente sudo apt-get remove openjdk-6-jdk ou sudo apt-get remove default-jdk .
apt-cache search mostra apenas os pacotes disponíveis, não os pacotes que você instalou. Para isso, tente sudo dpkg --list ; sudo dpkg --list | grep -i jdk mostrará todos os pacotes relacionados ao JDK instalados em seu sistema.
Execute este comando, que permite escolher qual instalação Java será o padrão:
sudo update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/java-6-openjdk-i386/jre/bin/java 1061 auto mode
1 /usr/lib/jvm/java-6-openjdk-i386/jre/bin/java 1061 manual mode
2 /usr/lib/jvm/java-7-oracle/jre/bin/java 1 manual mode