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如果 Java 应用程序需要特定的 JRE 版本,那么我如何在安装过程中检查它在 Mac OS X 上的可用性?

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2 回答 2

1

它应该像查看 /System/Library/Frameworks/JavaVM.framework/Versions/ 一样简单

例如从我的机器:

manoa:~ stu$ ll /System/Library/Frameworks/JavaVM.framework/Versions/
total 56
774077 lrwxr-xr-x  1 root  wheel    5 Jul 23 15:31 1.3 -> 1.3.1
167151 drwxr-xr-x  3 root  wheel  102 Jan 14  2008 1.3.1
167793 lrwxr-xr-x  1 root  wheel    5 Feb 21  2008 1.4 -> 1.4.2
774079 lrwxr-xr-x  1 root  wheel    3 Jul 23 15:31 1.4.1 -> 1.4
166913 drwxr-xr-x  8 root  wheel  272 Feb 21  2008 1.4.2
168494 lrwxr-xr-x  1 root  wheel    5 Feb 21  2008 1.5 -> 1.5.0
166930 drwxr-xr-x  8 root  wheel  272 Feb 21  2008 1.5.0
774585 lrwxr-xr-x  1 root  wheel    5 Jul 23 15:31 1.6 -> 1.6.0
747415 drwxr-xr-x  8 root  wheel  272 Jul 23 10:24 1.6.0
167155 drwxr-xr-x  8 root  wheel  272 Jul 23 15:31 A
776765 lrwxr-xr-x  1 root  wheel    1 Jul 23 15:31 Current -> A
774125 lrwxr-xr-x  1 root  wheel    3 Jul 23 15:31 CurrentJDK -> 1.5
manoa:~ stu$ 
于 2008-09-15T14:10:24.090 回答
0

这篇文章可能会有所帮助: http: //developer.apple.com/technotes/tn2002/tn2110.html
总结:

String javaVersion = System.getProperty("java.version");
if (javaVersion.startsWith("1.4")) {
  // New features for 1.4
}
于 2008-09-15T14:11:14.647 回答