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tar -zvxf openjdk-11+28_linux-x64_bin.tar.gz

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mv jdk-11/ /usr/local/java

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vim /etc/profile

export JAVA_HOME=/usr/local/java
export PATH=$JAVA_HOME/bin:$PATH   #一定要放在最后

source /etc/profile     #让配置生效

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ls -n /usr/local/java/bin/java /usr/bin/java