Mac 安装eclipse

Mac下安装eclipse提示 to use the "java" command-line tool you need to install a JDK.

eclipse 2020-09 要求jdk是11版本以上

本地已经下载openjdk并配置系统路径，java -version 运行一切正常。

MacBook-Pro:java ice$ java -version
openjdk version "15" 2020-09-15
OpenJDK Runtime Environment (build 15+36-1562)
OpenJDK 64-Bit Server VM (build 15+36-1562, mixed mode, sharing)

路径配置：

#JAVA
#export JAVA_HOME=`/usr/libexec/java_home -v 15`
export JAVA_HOME="$program_dir/jdk/Contents/Home"

但不管是eclipse还是eclipse installer 依然报错。
查原因：Mac下eclipse寻找jdk是用命令

MacBook-Pro:java ice$/usr/libexec/java_home -V
Unable to find any JVMs matching version "(null)".
Matching Java Virtual Machines (0):

Default Java Virtual Machines (0):

No Java runtime present, try --request to install.

而此命令寻找的java的安装目录在“/Library/Java/JavaVirtualMachines“。
所以只要更改jdk的安装目录值mac指定目录,删除路径配置即可解决。

MacBook-Pro:java ice$ sudo mv jdk-15.jdk /Library/Java/JavaVirtualMachines/
MacBook-Pro:java ice$ vi ~/.bash_profile 
MacBook-Pro:java ice$ source ~/.bash_profile 
MacBook-Pro:java ice$ java -version
openjdk version "15" 2020-09-15
OpenJDK Runtime Environment (build 15+36-1562)
OpenJDK 64-Bit Server VM (build 15+36-1562, mixed mode, sharing)
MacBook-Pro:java ice$ /usr/libexec/java_home -V
Matching Java Virtual Machines (1):
    15, x86_64: "OpenJDK 15"    /Library/Java/JavaVirtualMachines/jdk-15.jdk/Contents/Home

/Library/Java/JavaVirtualMachines/jdk-15.jdk/Contents/Home

/Library/Java/JavaVirtualMachines 可以安装多个版本的jdk，这时候需要切换
在~/.bash_profile 可以做如下配置

# 展示jdk列表
/usr/libexec/java_home -V

# 配置语句
export JAVA_HOME=`/usr/libexec/java_home -v `

# 示例
export JAVA_HOME=`/usr/libexec/java_home -v 15`