CentOS7安裝JDK8

1. 檢查系統中的jdk版本 java -version 顯示： openjdk version "1.8.0_102" OpenJDK Runtime Environment (build 1.8.0_102-b14) OpenJDK 64-Bit Server VM (build 25.102-b14, mixed mode)   2. 查詢自帶的openjdk rpm -qa | grep

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