Eclipse没有打开jvm过时的mac

Question

I am on a mac and try to program java with newer versions of eclipse, but they are not working. Old versions of eclipse are working, but I recently installed Eclipse Luna and when I open it, it says: "Version 1.6.0_31 of the JVM is not suitable for this product. Version: 1.7 or greater is required." But I have the newest version of java installed. I installed the newest version of the JDK, and if I'm not mistaken, JVM is Java virtual machine but I don't know how to update that. I am expirienced with java, however I am beginner to how stuff like the JVM works, so please try to be as specific as possible when explaining the answer. Also explain why it works and why it wasn't working before. I searched on this site before posting and one answer to a similar problem was to type

 export JAVA_HOME=/usr/libexec/java_home -v 1.7

into terminal, but terminal gave me the error:

 -bash: export: `/usr/libexec/java_home': not a valid identifier
 -bash: export: `-v': not a valid identifier
 -bash: export: `1.7': not a valid identifier

So please help, I don't know what to do.

Answer 1

I had the same issue for quite a while. This helped in my case. Run the following in your terminal..

export JAVA_HOME="/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home"

verify the change with java -version command..

Answer 2

Firstly, you need to verify that you've installed the 1.7 or newer JVM. To do this you do:

/usr/libexec/java_home --verbose

This command is built-in to mac OS X, and will list all the known java environments available. If you don't see a 1.7 VM in the list then it's not been installed correctly.

Secondly, you need to ensure that the version of Eclipse you downloaded is compatible with the JVM. For example, I have the following JDKs installed:

1.8.0_05, x86_64:   "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home
1.7.0_55, x86_64:   "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home
1.6.0_65-b14-462, x86_64:   "Java SE 6" /Library/Java/JavaVirtualMachines/1.6.0_65-b14-462.jdk/Contents/Home
1.6.0_65-b14-462, i386: "Java SE 6" /Library/Java/JavaVirtualMachines/1.6.0_65-b14-462.jdk/Contents/Home

This means that I can use a 64bit ( x86_64 ) version of eclipse with a 1.6, 1.7 and 1.8 VM.

This means that I can use a 32bit ( i386 ) version of eclipse with the 1.6 VM only because that is the only version that has a 32bit JDK.

The Eclipsepedia installation page indicates that a 1.7 JDK/JRE is required for most of the Luna package downloads based on Eclipse 4.4 (extracted from page).

So, make sure that you're using the 64bit downloads.

To determine the 32/64bit version of the eclipse instance that you downloaded, at a terminal go to the directory of the eclipse installation. In the same directory that has directories called: Eclipse.app , configuration , plugins there is a symlink to the eclipse binary. Run file eclipse and it will tell you the mode that it runs in; and if you get x86_64 then it's a 64bit version, if you get i386 then it's a 32bit version.

64bit:

$ file eclipse
eclipse: Mach-O 64-bit executable x86_64

32bit:

$ file eclipse
eclipse: Mach-O 32-bit executable i386

Answer 3

After installing the latest java SE run

export JAVA_HOME="/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home"

it Worked for me

Answer 4

I think the Java 1.6 version that you've on your system could be Apple's Java runtime. Starting Java 7, Apple has decided not to make their own port, you need to get it from Oracle.

It seems that there could be something wrong with your installation of Java. You can try removing existing Java installation(s) and you can install fresh copy of Java 7 from Oracle and then try running java -v first. If that works well, then you can set JAVA_HOME and go further.