是有点奇怪：
/Library/Java/JavaVirtualMachines /Library/Java/JavaVirtualMachines/jdk1.8.0_311.jdk /Library/Java/JavaVirtualMachines/jdk1.8.0_311.jdk/Contents/Home
实际上最后一个才是正宗的HOME，其下有bin目录
是有点奇怪：
/Library/Java/JavaVirtualMachines /Library/Java/JavaVirtualMachines/jdk1.8.0_311.jdk /Library/Java/JavaVirtualMachines/jdk1.8.0_311.jdk/Contents/Home
实际上最后一个才是正宗的HOME，其下有bin目录
