Linux jdk安裝多個版本並進行切換

轉自：html https://www.cnblogs.com/xu-dong/p/6429301.htmljava http://www.javashuo.com/article/p-fwcohewz-gc.htmllinux https://www.cnblogs.com/rysj/p/9173667.htmlweb https://blog.csdn.net/q979076061/artic

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