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Java Data Type Q&A » bit » 64 bit 1 

1. Benefits of 64bit Java platform    stackoverflow.com

I'm an absolute n00b into the java platform I would like to know whether I need to change anything in my code to get the benefits of 64bit JRE ? or is ...

2. How to determine build architecture (32bit / 64bit) with ant?    stackoverflow.com

We have inherited an ant build file but now need to deploy to both 32bit and 64bit systems. The non-Java bits are done with GNUMakefiles where we just call "uname" to get ...

3. How do I use a 32 Bit COM object from a 64 bit process?    stackoverflow.com

I Use Jacob (JAVA COM Bridge) on a 64 Bit Machine and want to load COM Objects from a 32 bit DLL. How can I do that?

4. Consequences of Java 32bit on Win(any) 64bit?    stackoverflow.com

I am trying to install JAI (Java Advanced Imaging) 1.1.3 in my Vista 64 and it says that in order for it to be installed JDK 1.3 and up must be ...

5. Why does Java Web Start not work with 64-bit Java environments?    stackoverflow.com

Java Web Start does not come with 64-bit builds of the JDK. Why is this? What is lacking that keeps it from building and working?

6. Does Java 64bit perform better than the 32bit version?    stackoverflow.com

I noticed sun is providing a 64bit version of Java. Does it perform better than the 32bit version?

7. How do I detect which kind of JRE is installed -- 32bit vs. 64bit    stackoverflow.com

During installation with an NSIS installer, I need to check which JRE (32bit vs 64bit) is installed on a system. I already know that I can check a system property "sun.arch.data.model", ...

8. When will the 64-bit version of JDIC be available?    stackoverflow.com

My Java program needs lots of memory to run, the 32-bit version of Java max out at 1.5 GB, my system has 4 GB of RAM, so I decided to run ...

9. Detecting a 64-bit jre in a 32-bit browser?    stackoverflow.com

Is there any way to detect a 64-bit java install in a 32-bit environment? The Java Deployment Toolkit detects nothing, but I was wondering if there was some secret browser way ...

10. How do I determine the position of the nth most significand bit set in a 64-bit value?    stackoverflow.com

I'm using some long values as bitmaps in a Java program. Here's my method so far:

public class BitmapUtil
{
    private static final long _B_MASK_LEFT_ON = 0x8000000000000000L;

    ...

11. What do you say of chopping type-4 UUID in this manner    stackoverflow.com

Check this,

    List<String> list = new ArrayList<String>();
    for (int i = 0; i < 10000; i++) {
        String ...

12. How Do I Run IntelliJ IDEA 9 as a 64-bit Process?    stackoverflow.com

I've noticed that IntelliJ IDEA 9 runs as a 32-bit process in Windows 2003 x64 and would like to configure it to run as a 64-bit process. I did find

13. Generating *.WAR (64bits x 32bits)    stackoverflow.com

Is there any difference generating a *.war file using a 64bits VM rather than 32bits? I'm facing an issue after deploy an application using a new laptop I’ve bought recently - Windows ...

14. How do I divide a string of 64bits into four 16bits in Java?    stackoverflow.com

How can I split the 64 bit input into 16 bits?

15. How do I tell whether my IE is 64-bit? (For that matter, Java too?)    stackoverflow.com

Millions of questions already on the web about how to tell whether the OS is 64-bit, but not whether IE and/or Java runtime is 64-bit. Some background: I installed 64-bit Win ...

16. Is writing a reference atomic on 64bit VMs    stackoverflow.com

The java memory model mandates that writing a int is atomic: That is, if you write a value to it (consisting of 4 bytes) in one thread and read it in ...

17. How can a 1Gb Java heap on a 64bit machine use 3Gb of VIRT space?    stackoverflow.com

I run the same process on a 32bit machine as on a 64bit machine with the same memory VM settings (-Xms1024m -Xmx1024m) and similar VM version (1.6.0_05 vs 1.6.0_16). However ...

18. MXMLC and 64bit JRE    stackoverflow.com

Are there any workarounds to get the Flex compiler to work with a 64bit JRE? If I use an MXMLC task in an Ant buildfile in Eclipse it works fine but ...

19. Can Nexus/Maven store 32 bit and 64 bit artifacts at the same time?    stackoverflow.com

I'm currently using Nexus as an artifact repository manager. Artifacts are deployed to Nexus automatically via a build machine running Hudson. The build machine is a 64 ...

20. Why should I use the 64-bit JDK over the 32-bit version?    stackoverflow.com

I use Eclipse and 64-bit Windows and develop Java desktop applications. Sofar I have only used the 32-bit JDK, is there any reason to change to 64-bit JDK for Java development? ...

21. Java 64 bit JDK question    stackoverflow.com

If I compile some java files using a 64 bit JDK and then make a JAR file out of them will the resultant JAR correctly work with a 32 bit JRE, ...

22. Running JWS remotely on 64-bit machine    stackoverflow.com

The problem is that my JNLP file works locally on my 64-bit machine (running on my own machine), and locally and remotely on my 32-bit machine - but not remotely on ...

23. How can I call jstack programmatically on a 64-bit process?    stackoverflow.com

I've got a little tool to help debug client problems with our Java application. Basically it runs jps.exe to get all the Java processes running on the machine, and then ...

24. first 64 bits of the fractional part of the square root of 2    stackoverflow.com

 double i=Math.sqrt(2);
 double fpart=i-(long)i;

 String s=String.valueOf(fpart);
 s=s.substring(2, s.length()-1);

 Long b=Long.parseLong(s);
 System.out.println(Long.toBinaryString(b));

 System.out.println(Long.toBinaryString(b).substring(0, 63));
i'm getting StringIndexOutOfBoundsException as the strig is only 52 bits long. But, I want the first 64 bits ...

25. How can i get 64 bits of the fractional part of the square root of a number in java?    stackoverflow.com

How can i get 64 bits of the fractional part of the square root of a number in java?

26. 64 Bit Java for small stand alone applications    stackoverflow.com

Is it really a worth migrating small stand alone java applications (Max : 100-200MB heap) on 64 bit Java. Are there any specific advantages; My observation is , it just increases memory ...

27. JOGL 32 vs. 64 bit libraries error    stackoverflow.com

I am new to JOGL. I use Eclipse and I imported JOGL jar and dll (yes, Windows OS). But, when I was searching for JOGL libraries, I downloaded 32 bit version. ...

28. Loading 32 or 64 bit JNI Library in Java    stackoverflow.com

In my Java application I need a JNI library which is available for 32 bit and 64 bit. I don't want to ship two different versions of my application so I ...

29. NSS 32 bit package on Java 64 bit    stackoverflow.com

I have Windows 7 with 64 bit environment. Configuring gateway, I run NSS3.12.4 32 bit on 64 bit platform and got this error. Libnspr4.dll Can't load IA 32 bit .dll on AMD 64 bit ...

30. Do Java CRC32 implementations differ on 32Bit and 64Bit    stackoverflow.com

Is there any difference between the Java CRC32 implementations on 32Bit and 64Bit JVMs? My problem is, that my client application (on a 32Bit platform) calculates a hash and compares it against ...

31. NSIS - Failing to run Java Application with 64 bit Java    stackoverflow.com

My installer launches a batch file in -post. Under 32 bit this works fine but when I have 64 bit JVM installed I get this error: 'java' is not recognized as an ...

32. how can I check whether on which mode(32 or 64 bit)is java runtime version is running    stackoverflow.com

can you please please let me know how can I check whether on which mode (32 or 64 bit) my java runtime version is running.

33. Does RedHat OpenJdk 64 bits exists?    stackoverflow.com

All is in the title and I can't find clear information on the web. Many thanks, Manu

34. Java: 64 bit or 32 bit    stackoverflow.com

Our customers are at a stage when some of them might benefit from a heap greater than 4 GB. Some questions:

  • Is 64-bit java stable?
  • Is it mission-critical/production app ready?
  • Are there other advantages ...

35. java byte code in 64bit    stackoverflow.com

I have looked over the instruction set for x86_64bit machine and try to match but unfortunately didn't get any solution. I don't want the exact answer, just asking if someone know ...

36. Problem trying to load odbcad32 on 64-bit machine    stackoverflow.com

I am currently making a small java application to do some CRUD on an access database. At tafe they run 32-bit machines so it works there, but at home i run ...

37. Accessing Hardware PKCS11 Token on a 64 Bit Machine    stackoverflow.com

So here's what I'm trying to do. I have a hardware token with some certs on it and I'm writing a Java application to try and access those certs. I have ...

38. Finding out sytem architecture using Java    stackoverflow.com

I'm trying to find out the system architecture using Java and I've tried out:

operatingSystemMXBean.getArch()
and
String sys1=System.getProperty("sun.arch.data.model")
but I get amd64 when I'm using an Intel 64 bit processor. I've read this article ...

39. How do you pass 64-bit values across to java from native code on 32-bit machines?    stackoverflow.com

I'm writing a JNI function that returns a jlong. Since the native library must run on 32-bit machines, I've compiled it using -m32 option. How do i pass 64-bit values across? I've ...

40. JMF on 64bit java?    stackoverflow.com

I know JMF is pretty much dead and whatnot, but I do know that it can still be used. I intend to use it for personal uses and don't expect that much ...

41. 64 bit java    coderanch.com

Hi gang. How can I determine what mode (32 or 64 bit) I'm running in? I've tried java -version but see nothing except for the actual version #. And I heard a rumor a long long time ago that even though the JRE is installed on a 64 bit machine, you still have to force Java to run in 64 bit ...

42. Java 14.2. 64 bit processor    coderanch.com

43. 64 bit and 32 bit ?    coderanch.com

Hi, I have a doubt regarding what are the basic considerations which need to be taken while pogramming for a 32 bit or a 64 bit OS. Also when there are multiple processors in the computer, is it same as multithreaded programming ? To refrase, how does java programming differ while programming for a multiprocessor system. Thank you. Best Regards Ayub. ...

44. Move application to 64 bit    coderanch.com

My Website currently runs on 32 bit windows .I use tomcat with apache.I want to know whether it work properly if move the code to 64 bit windows.I know this is not the right place to ask Microsoft technologies questions but i have no options my boss told me to find out whether all other vb,.net code work properly in 64 ...

45. compile 32 bit deploy to 64 bit    coderanch.com

If we deploy to a 64 bit JVM do we need to compile in a 64 bit JVM so it runs optimally? Or is the bytecode the same no matter where you compile it? We have deployed our code to a 64 bit enviroment and it appears slow. It was compiled in a 32 bit enviroment. Just want to make sure ...

46. can one java application running in 32 bit VM talk to other running in 64-bit VM?    coderanch.com

The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - ...

47. 64 bit java calling 32 bit library    coderanch.com

I believe the difference between a 64 bit JVM and a 32 bit JVM is how the JIT works. The JIT for a 64 bit JVM will generate instructions using the longer address spaces, longer registers, etc. The class files are the same for both, as there is no distinction like 32 bit and 64 bit class files. Please correct me ...

48. java install (64-bit Vista)    coderanch.com

I gues i had the path wrong not sure how. I used the system variable JAVA_HOME and used the C:\Program Files (x86)\Java\jdk1.6.0_04\bin\ as my info for the variable then int he path i used, now this could be wrong %JAVA_HOME% but now i need to get sql builder to work Thanks for the quick idea.

49. 32 Bit to 64 Bit    coderanch.com

Hi all, I have programmed my application usually in 32 bit windows xp operating system. It uses a lot of threads and socket connections. Will there be any specific problem if I deploy my application in 64 bit winxp operating system? It is a desktop app and uses swt as its toolkit. I have read that java is write once run ...

50. Java compiling in 64 bit    coderanch.com

No. At compile time, compilation is done to java bytecodes -- which is not dependent on the bit size of the native machine. At run time, however, it depends on the type of JVM. If you are using a 64 bit JVM on your 64 bit machine, the JIT (just in time) compiler will compile the bytecodes to native 64 bit ...

51. Formatting any <= 64-bit number with commas    coderanch.com

I would like to trim this code down. Does anyone have an idea on how to reduce this code footprint? Is there a simple number formatting class in Java that I missed? private String addComma(String s_num) { try { Double.parseDouble(s_num); } catch (Exception e) { return "NaN"; } int point = s_num.indexOf("."); String whole = ""; String partial = ""; char[] ...

53. JRE 32bit or 64 bit?    coderanch.com

55. Diffrence between code complied on 32, 64 bit JDK?    coderanch.com

Hi, Just wanted to know if there will be any difference in terms of performance between code complied on 32, 64 bit JDK, while running on 32, 64 bit JDK? Therotically there should not be any difference , but the .class files are in binary format and are created using specific jdk's. Thus there might be difference according to which JDK ...

56. Check if 32 bit or 64 bit processor?    coderanch.com

57. Greenhorn with 64-bit can't set path    coderanch.com

Hi, Would you please help a Greenhorn with a 64-bit system, who downloaded java through a 64-bit Browser (does that make a difference?) My Command Prompt says C:\Users\Gary>; and I've then typed various combinations of: cd C:\Program Files\Java\jdki.6.0_15\bin\javac MyClass.java which is what you were explaining to someone in yesterday's forum. Actually the 15 shown above and in my files is different ...

58. how to know 32 or 64 bit application    coderanch.com

There are 32 and 64 bit versions of the JVM. You can probably find out which one you are using with the System.getProperty method. See the javadoc for the System.getProperties method to find out what properties are available. However, as Campbell said, there is no such thing as a 32 or 64 bit java application (unless it contains some platform specific ...

59. Remote Debugging 32 bit to 64 bit    coderanch.com

60. How to check the jdk bit version (32bit or 64 bit)    coderanch.com

Check System.getProperty("os.arch"). This will print out something like x86 for a 32 bit JVM. System.getProperty("sun.arch.data.model") also seems to be doing the job. But keep in mind, these (most likely) return the value for the JVM - a 32 bit JVM on a 64 bit OS will probably still be identified as 32 bit.

61. SDK 32 or 64 bits ?    coderanch.com

And to elaborate, Java is compiled into byte code that is interpreted by the JVM. There is no "32 bit" or "64 bit" inside it. There's not even "Windows" or "Linux" in it. A few things to be careful for: - native libraries (JNI); unlike Java byte code, these are both platform and architecture specific. You will need to rewrite / ...

62. Only 32 bit version updated, 64 bit remains old    coderanch.com

Not sure if this belongs here, but... A friend bought a new laptop and of course I am the sysadmin. After updating Java (JRE, the web plugin stuff, not JDK), I checked by "java -version" and I saw I still have 1.6.0_17 in stead of update 24. Afterwards I noticed that I have two copies of java, one 32 bit and ...

63. Compiling an application for 64-bit    coderanch.com

No. Java bytecode is completely independent of the underlying platform - it doesn't matter if the operating system is 32-bit or 64-bit. There is no 32-bit and 64-bit Java code. "Mixed mode" does not mean that it accommodates 32-bit and 64-bit applications. It means that it runs in interpreted mode (i.e. your Java byte code is interpreted and executed) as well ...

64. 64 bit applications    coderanch.com

You normally don't need to know. Java applications are independent of the "bitness" of the operating system. You don't need to do anything to make your application to run on a 32-bit or 64-bit operating system. If you really want to know, you can look at the "os.arch" system property: System.out.println("Operating system architecture: " + System.getProperty("os.arch")); On the system which I'm ...

65. Win 7 (64-bit) and Java    java-forums.org

My grandson has a computer with Win 7 (64-Bit) and IE 8. He was told today by a friend that Java version 19 was now availabe. When he tried to update his Java (1.6.0.18-b07) he got a pop-up stating: "You already have the laterst Java platform on this system." Why would it say that if he has 1.6.0.18-b07 and expected to ...

66. How can i get 64-bit from a String?    java-forums.org

Re-reading the OP, I think (as Norm does) that they're asking how to get the text "64-bits" from another text string...but I can't actually see the point. In order to get that text, you'd have to use that text to find the index for it, which you'd then use to get...the test...which you already have. Unless it's actually a "does this ...

67. Problem with command argument in java 64 bit    java-forums.org

Hi Friends, I am using 64 bit java and 64 bit windows 2008.. as I am sending relative path in command argument like :- \\10.101.17.28\Logs\UAL_LOGS\UAL-ASR-57-22-97-22-061217H\logs\*.merged this is converted to all file path within this location.. but that is not haping on windows xp have a look.. of autput (I am attaching Test.java file too) C:\Users\kchoudhary\Desktop\New Folder>java Test "\\10.101.17.28\Logs\UAL_LOGS\UAL-ASR-57-22-97-22-061217H\logs\*.merged" \\10.101.17.28\Logs\UAL_LOGS\UAL-ASR-57-22-97-22-061217H\logs\NUAN-13-23-sopcpasr02-EIFBELCDAAAADNAJAAAAAAAO-LOG.merged \\10.101.17.28\Logs\UAL_LOGS\UAL-ASR-57-22-97-22-061217H\logs\NUAN-18-17-sopcpasr02-EIFBEMEJAAAMKCNNAAAAAAAA-LOG.merged \\10.101.17.28\Logs\UAL_LOGS\UAL-ASR-57-22-97-22-061217H\logs\NUAN-18-22-sopcpasr02-EIFBEMEOAAANBMOPAAAAAAAB-LOG.merged ...

68. Problem with Java 64-bit on my laptop    java-forums.org

Hi :) I am too new for this forums :D so here is my problem I use Windows 7 Ultimate 64-Bit using Java 6u25 (64-bit) so I did open my cmd and type -java version its says "java is not recognized as an internal or external command operable program or batch files. but I do have Java 6u25 on my laptop! ...

70. --- java version for ==> XP Professional 64 bit    forums.oracle.com

1. Go to [http://java.sun.com/javase/downloads/index.jsp|http://java.sun.com/javase/downloads/index.jsp]. 2. Click on the ">>Download" button on the right side of the section "JDK 6 Update 7" 3. There will be a "Platform" drop-down menu: select "Windows x64" 4. Read the terms of use and check box stating that you agree with them. Follow download directions from that point.

71. What's the difference between JDK 32-bit and JDK 64-bit.    forums.oracle.com

Well, the subject pretty much says it all. I'm wondering which of these kits it would be best to use for my new computer. It comes equipped with Windows Vista, so my intuition says I should go for the 64-bit JDK, but after a quick look through the documentation I couldn't seem to find any information on any differences or restrictions ...

72. 32 or 64-bit    forums.oracle.com

73. Experts Please see : support for libawt.so on 64 bit machine RHEL    forums.oracle.com

I have installed the jdk1.4.2_08 on 64 bit version of RHEL In one java application which is exporting some data in PDF. I am getting this error................. java.lang.UnsatisfiedLinkError: /tmp/install.dir.29621/Linux/resource/jre/lib/i386/libawt.so: libXp.so.6: cannot open shared object file: No such file or directory first i searched the net for the solution and i am sure that on my system ---libXp.so.6 exist in /usr/X11R6/lib64 ---my ...

74. Java 6 - 64 bit only    forums.oracle.com

75. How to check JDK for 64bit installation?    forums.oracle.com

I just got a new XFIRE 2100 AMD64 and I have a bit of experience with JAVA I downloaded the latest 1.5 update and followed the Solaris 10 instructions, includding the 64bit instructions... But I'm not quite sure if my version of JAVA installed is 64bit or not. How can I confirm this?

76. do i need to compile the source if i want to use application on 64-bit PC    forums.oracle.com

Hello all, I would like to install tomcat on 64-bit machine. do i need to build it from source or can i directly take the binary files provided in the website. Is there any difference between building it from source and directly taking the jars which are i guess compiled on 32-bit machines. Thanks in advance, cheers vamsee movva

79. 64 bit Java Question.    forums.oracle.com

80. Handling 64 bit time    forums.oracle.com

It is a 64 bits field: 32 bits for the seconds + 32 bits for the nano-seconds. The 4 bytes seconds field correspond to the number of seconds since the system epoch (0h00 GMT, 1st January, 1970), and the 4 bytes nanosecond field correspond to the number of remaining nanoseconds. Is this info sufficient?

82. 32 and 64 bit compilation    forums.oracle.com

Hi, I have a query on running the class files on 32 and 64 bit machines. I have class files generated on a 64 bit machine with a 64 bit JVM. Will these class run on a 32 bit machine? or if i do generate class files on a 32 bit and try to run on 64 bit machine, will this ...

83. JDK 6u11 64 bit fails to install    forums.oracle.com

Hi guys, I'm having a bit of trouble installing JDK 6 update 11 Windows x64. I previously had some beta of version 10, but I uninstalled all copies of Java before installing this one. Unfortunately, I can't install update 11. I tried installing the JRE separately and that worked, but even then if I try to install the JDK afterwards and ...

84. RS 232 with Java 64Bit ?    forums.oracle.com

85. JNI 64-bit    forums.oracle.com

My Java program uses JNI library. It is 32-bit code. I guess this may cause UnsatisfiedLinkError, if Java VM is 64-bit. The only solution that comes to my mind is to provide 2 versions of my library: one for 32-bit systems and one for 64-bit systems. How to test which library should be loaded? On Macintosh it is possible to create ...

86. How to check 32bit or 64bit machine using Java    forums.oracle.com

Hi friends, How to find the underlying machine architecture (32bit or 64bit) using Java. Some sites say there is a java system property sun.arch.data.model which gets the architecture. But the other sites say it only gets the JVM size. And one guy has checked on an HP-UX running on an Itanium2 (64 bit CPU) using a 32-bit JVM and he got ...

87. Compatibility issue between JDK 32, 64 and JRE 32, 64 bit    forums.oracle.com

If I compile some classes with a 32 bit JDK, is it possible to run that bytecode on a 64bit JRE. If I compile some classes with a 64 biy JDK, is it possible tu run that bytecode on a 32bit JRE. - If I try to install a 32 bit JRE on 64 bit machine is that JRE going to ...

88. Moving to 64bit Java    forums.oracle.com

Hi, We are interested in moving to 64 bit java due to memory issues (HUGE data models) We are in the process of investigating possible OS and hardware platforms. Our preference is for 64bit Windows Vista and Intel Xeon based workstations from DELL. Does anyone know if this is a problem with this OS and CPU combination ? The 64 bit ...

89. How many heap may I use with 64-bit Java?    forums.oracle.com

As I know, on x86 machine with 4GB memory, Java can allocate at most near 2GB memory. I'm developing a application that need a lot of memory. If I have a x64 machine with 64-bit Linux and 64-bit Java and it has 8GB of memory, how many memory can I allocate at most? 4GB?

90. Is this JAVA on HP 64 or 32 bit version ?    forums.oracle.com

91. 32bit program on 64bit    forums.oracle.com

92. Reg: 64-bit JDK for Intel Xeon    forums.oracle.com

93. 32-bit JRE Vs 64-bit Jre    forums.oracle.com

94. 64bit IDE HELP    forums.oracle.com

Hi, I always used eclipse as IDE for java. Now I have to use vista64bit, but I can't get eclipse run on this OS. Does someone knows how to make it run on winvista64bit? I've tried netbeans, but I can't find how can I set different JVM options for different main classes in the same project. Someone of you can help ...

95. Where are the 64-bit versions of Java?    forums.oracle.com

So its easier to afford a 16 slot motherboard and all the 1 gig sticks to fill it than to locate a file on the internet. I'll tell you where it is, just write your name and email address on the back of a TYAN S4881G2NR Quad Socket 940 NVIDIA nForce Professional 2200 + AMD 8131 SSI MEB v3.5 footprint Server ...

96. Re: 64 bit programming environment    forums.oracle.com

97. Detect 32 vs. 64 bit JRE programmatically    forums.oracle.com

98. 64-bit Java 1.6 SE    forums.oracle.com

99. Is my JDK 64bit?    forums.oracle.com

I have SUN XFIRE AMD 64 I have downloaded and followed the instructions to install the 64bit JDK for Solaris 10. I think I have done everything right. When I run java on the console I can see there's a -d64 parameter. Is that safe enough to assume it's 64bit? Or is there a way to check? Reason why I'm asking ...

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