完全卸载并重新安装 OpenJDK

Question

我搜索了 askubuntu 并尝试了建议但失败了。我尝试了这个问题：如何完全卸载 Java？

1.我运行sudo apt-cache search openjdk得到以下内容：

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.运行 sudo apt-get remove openjdk 得到以下内容： 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.

Answer 1

您无法删除 OpenJDK 7，因为它尚未安装。如果您尝试删除 OpenJDK 6，请尝试sudo apt-get remove openjdk-6-jdk或sudo apt-get remove default-jdk。

apt-cache search只显示可用的包，而不是你已经安装的包。为此，请尝试sudo dpkg --list；sudo dpkg --list | grep -i jdk将向您显示系统上安装的任何与 JDK 相关的软件包。