linux如何修改jdk版本

# 安装OpenJDK 8
sudo apt update
sudo apt install openjdk-8-jdk

# 安装OpenJDK 11
sudo apt install openjdk-11-jdk

sudo update-alternatives --list java

# 配置OpenJDK 8为默认版本
sudo update-alternatives --config java

# 或者直接设置
sudo update-alternatives --set java /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java

java -version

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export PATH=$JAVA_HOME/bin:$PATH

source /etc/profile

#!/bin/bash

if [ "$1" == "8" ]; then
    sudo update-alternatives --set java /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
elif [ "$1" == "11" ]; then
    sudo update-alternatives --set java /usr/lib/jvm/java-11-openjdk-amd64/bin/java
else
    echo "Usage: switch_jdk.sh [8|11]"
    exit 1
fi

java -version