Ubuntu安裝JDK

1. 下載JDK https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html 下載.tar.gz安裝包   2. 上傳解壓 上傳安裝包到home目錄下 創建jdk存放目錄：mkdir /usr/lib/jdk 移動到指定目錄：mv /home/jdk-8u251-linux-x64.tar.gz /usr/l

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