- Most recent version of java for mac update#
- Most recent version of java for mac code#
- Most recent version of java for mac windows#
If all else fails, try buying your system administrator a decent cup of coffee and asking nicely.
(You should have permission to read any directories that might contain java libraries you'd reference, so you can ignore "Permission denied" messages.) On linux-based systems, where there is much greater scope for variability, try running the find command on directories like /usr/lib or /usr/share. If that fails, try searching for the java executable itself, and use the name of the directory that contains the bin/ directory that, in turn, contains the java executable. If you find one, look down into it until you find the subdirectory containing the bin/ and lib/ directories.
Most recent version of java for mac windows#
On Windows machines, first look for a " Java/ directory in your " Program Files", " Program Files (x86)" or equivalent system directory. This can be tricky, since the installation might be for the Java Developers Kit (look for directories starting with " jdk"), or the Java Runtime Environment (look for directories starting with " jre"), or it might be referenced as the Java Virtual Machine (look for directories starting with " jvm").
Most recent version of java for mac update#
I'm not a java programmer, so if you happen to have a program like this you'd like to donate to the cause, please get in touch.Īlternately, if you have the privileges you can update your java installation to the most recent version and use the "Java Version 1.7 or later" method, above.Īs a last resort, you'll have to dig through system directories, trying to find the java installation files. A java programmer should be able to write a reasonably short program to print this value for you on demand, so you never have to bother him or her again.
The value needed is the value of the property, which is available from inside a java executable if you know what you're doing. You're going to have to either scroll or, on linux-based systems, redirect error output to a file and then grep through that.Īre You, or Do You Know, a Friendly Java Programmer? Note that java dumps this listing to stderr rather than stdout, so the usual pipe through more will not have the desired effect. Scroll through the output to find the line (about a dozen lines from the beginning of the listing) containing " ", and use the value part of that line. % java -XshowSettings:properties -version If the answer is 1.7 or later, then this command will dump several dozen lines of property settings to your screen: To see your Java version (Windows or Linux), do: If your Java version is fairly recent, there's a useful command option that lists out a whole bunch of system property settings, including the value of, which is what we need.
Most recent version of java for mac code#
If you don't have this command handy, you can create one yourself using the code near the bottom of this page, under Sample Perl Script: java_home. Just do this from the command line:Īnd use the result. If so, then the Apple system programmers may have done you a favor and provided a handy little command called " java_home" that returns the value you need. So if JAVA_HOME isn't already set, your next task is to find the directory to which you need to set it. For linux users, it is almost certainly not the same directory that you get if you do " which java" from the command line, because that would be too easy. The JAVA_HOME environment variable needs to point to the installation directory on your system that contains the bin/ directory where the java executable physically resides, and the lib/ directory which contains the core java libraries and properties files. If the answer is a directory path, you're good to go. To check, on the Windows command line do:
Sometimes your JAVA_HOME environment variable will already be set for other reasons. 2.4 Are You Ready to Do It the Hard Way?.2.3 Are You, or Do You Know, a Friendly Java Programmer?.
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