我對 Ubuntu 非常陌生。話雖如此，我已經遵循了幾個小時的命令來安裝和卸載 Java 8。我卸載了 Java 7，因為它需要 8，但我似乎無法讓它工作。我透過刪除整個資料夾來刪除安裝程式：
sudo rm -r /usr/lib/jvm/java-8-oracle/
然後我運行：
sudo apt-get install -f
sudo apt-get purge oracle-java8-installer
sudo apt-get install oracle-java8-installer
我得到的回應：
download failed
Oracle JDK 8 is NOT installed.
dpkg: error processing package oracle-java8-installer (--configure):
subprocess installed post-installation script returned error exit status 1
No apport report written because the error message indicates its a followup error from a previous failure.
dpkg: dependency problems prevent configuration of oracle-java8-set-default:
oracle-java8-set-default depends on oracle-java8-installer; however:
Package oracle-java8-installer is not configured yet.
dpkg: error processing package oracle-java8-set-default (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
oracle-java8-installer
oracle-java8-set-default
E: Sub-process /usr/bin/dpkg returned an error code (1)
我很感激這方面的幫助，我會非常正面地回應。在解決這個問題之前我無法繼續前進。謝謝