How to find out if an installed Eclipse is 32 or 64 bit version?

Question

How can I find out if a specific Eclipse instance on my (Windows 7) PC is the 32-bit or 64-bit version?

I've checked the About screen and the maze of dialogs one can call from there, but I didn't find any clues.

Also, right-clicking eclipse.exe in Windows explorer and opening the properties dialog box didn't give any hints.

score 214 · Accepted Answer · edited Aug 19 '14 at 20:24

214

Hit Ctrl+Alt+Del to open the Windows Task manager and switch to the processes tab.

32-bit programs should be marked with *32.

edited Aug 19 '14 at 20:24

corazza

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answered Feb 24 '11 at 10:38

Sam Dufel

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Or hit Ctrl+Shift+ESC to launch Task Manager quicker. – simon Nov 23 '11 at 12:36
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only if you are a windows user. – Gab Dec 17 '12 at 11:01
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If you can't open Eclipse search alternate answers below for eclipse.ini – Leo Jan 21 '13 at 15:52
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@Gab - the question was referring to windows. – Oddman May 11 '13 at 02:15
-1 because this assumes you can load eclipse, see answer below. – Adam Burley Oct 27 '14 at 15:51
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@Kidburla - I'm a little surprised at how popular this question has gotten over the years. However, if you look at the original question, he was clearly able to open eclipse. – Sam Dufel Oct 27 '14 at 17:23

Bhavana Vadodariya · Answer 2 · 2015-11-23T05:27:50.103

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Open eclipse.ini in the installation directory, and observe the line with text:

plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.0.200.v20090519 then it is 64 bit.

If it would be plugins/org.eclipse.equinox.launcher.win32.win32.x86_32_1.0.200.v20090519 then it is 32 bit.

edited Nov 23 '15 at 05:27

answered Mar 06 '12 at 05:50

Bhavana Vadodariya

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If your installation is 64-bit the string **x86_** (which identifies a 32-bit installation) will still match. You need to look for **x86_64_** – Leo Jan 21 '13 at 15:54
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how does that tell me I have 64 bit vs 32 bit? – tatmanblue Jan 30 '15 at 19:53
@tatmanblue read string again, if u have basic knowledge of 32 and 64 bit, you will come know definitely :) – Bhavana Vadodariya May 03 '15 at 10:24
so what is the answer? which string is 32 and which is 64? – Oliver Watkins Oct 29 '15 at 10:24

score 63 · Answer 3 · edited Aug 19 '14 at 20:20

63

Help -> About Eclipse -> Installation Details -> tab Configuration

Look for -arch, and below it you'll see either x86_64 (meaning 64bit) or x86 (meaning 32bit).

edited Aug 19 '14 at 20:20

corazza

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answered Jun 07 '12 at 08:44

Though OP asked for Windows platform, this answer is OS independent: works for both Windows and Linux. – alphaGeek Nov 02 '20 at 09:28

score 23 · Answer 4 · edited Aug 19 '14 at 20:19

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In Linux, run file on the Eclipse executable, like this:

$ file /usr/bin/eclipse
eclipse: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.4.0, not stripped

edited Aug 19 '14 at 20:19

corazza

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answered Feb 24 '11 at 10:43

Haakon

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score 8 · Answer 5 · edited Dec 30 '16 at 23:33

Go to the Eclipse base folder → open eclipse.ini → you will find the below line at line no 4:

plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v20150204-1316 plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.200.v20120913-144807

As you can see, line 1 is of 64-bit Eclipse. It contains x86_64 and line 2 is of 32-bit Eclipse. It contains x_86.

For 32-bit Eclipse only x86 will be present and for 64-bit Eclipse x86_64 will be present.

How to find out if an installed Eclipse is 32 or 64 bit version?

5 Answers5

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