Centos7安装JDK

安装JDK

yum install java-1.8.0-openjdk java-1.8.0openjdk-devel

配置环境

cd /usr/lib/jvm
vim /etc/profile

增加以下配置
# set java env
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.275.b01-0.el7_9.x86_64
export JRE_HOME=$JAVA_HOME/jre CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

测试

java -version
java
javac

public class Hello {
    public static void main(String[] args) {
        System.out.println("Hello World!");
    }
}

常见问题

# javac命令无效
yum install java-devel