安装
因为并非所有用户都用得着 Java ,所以在默认状态下 OS X 不预装 Java , 如果你需要的话可以手动安装.
1. http://support.apple.com/kb/DL1572
到苹果官网下载.
http://support.apple.com/downloads/DL1572/en_US/JavaForOSX2014-001.dmg
2.http://www.oracle.com/technetwor ... ownloads/index.html
到 Oracle 下载最新版的 Java 8 JDK 安装.
安装后在终端输入
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java -version
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如果显示版本就说明安装好了.
如果显示如下, 就说明没安装对,需要重新来过.
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No Java runtime present, requesting install.
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在MAC上查找和设置$JAVA_HOME
可以使用工具命令“/usr/libexec/java_home”来定位JAVA_HOME:
定位JAVA:
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/usr/libexec/java_home -V
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Matching Java Virtual Machines (1):
1.8.0_25, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home
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另外可以使用-V选项列出所有版本的JAVA_HOME:
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$ /usr/libexec/java_home -V
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Matching Java Virtual Machines (3):
1.7.0_45, x86_64: "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home
1.6.0_65-b14-462, x86_64: "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
1.6.0_65-b14-462, i386: "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home
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配置JAVA_HOME:
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$ cat ~/.profile
JAVA_HOME=` /usr/libexec/java_home `
export JAVA_HOME
$ echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk1 .7.0_45.jdk /Contents/Home
$ source ~/.profile
$java
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