The options -d32 and -d64 have been added to the Java launcher to specify whether the program is to be run in a 32 or 64-bit environment. is valid only for the Solaris operating system. Later in the JDK's FAQ, we can read: All other platforms (Windows and Linux) contain separate 32 and 64-bit installation packages.

2018年7月25日 · What is the easiest way to install 32 bit java on 64 bit ubuntu. 1. 32 bit Java won't install on my x64 ...

2017年11月16日 · As of Java SE 8, new methods in the Integer class allow you to fully use the int data type to perform unsigned arithmetic: In Java SE 8 and later, you can use the int data type to represent an unsigned 32-bit integer, which has a minimum value of 0 and a maximum value of 2^32-1. Use the Integer class to use int data type as an unsigned integer.

2013年6月25日 · However, the choice between 32-bit and 64-bit JVMs can matter if your Java application is using native-code libraries, which may be built for use in a 32-bit application, a 64-bit application, or both. If you have native libraries that support only 32-bit applications, you either need to use a 32-bit JVM, or build 64-bit versions of the libraries.

2010年10月31日 · Integers are 32 bits wide even on 64-bit platforms. The Java language specification states quite clearly (slightly paraphrased to make more readable, in my opinion): The integral types are byte, short, int, and long, whose values are respectively 8-bit, 16-bit, 32-bit and 64-bit signed two's-complement integers, and char, whose values are 16 ...

2013年2月3日 · The difference is that Java binaries compiled as x86 (32-bit) or x64 (64-bit) applications respectively. On a 64-bit Windows you can use either version, since x86 will run in WOW64 mode. On a 32-bit Windows you should use only x86 obviously. For a Linux you should select appropriate type x86 for 32-bit OS, and x64 for 64-bit OS.

2014年6月3日 · Since Solaris has both a 32 and 64-bit J2SE implementation contained within the same installation of Java, you can specify either version. If neither -d32 nor -d64 is specified, the default is to run in a 32-bit environment. Other Java commands (javac, javadoc, etc.) will rarely need to be executed in a 64-bit environment.

Most tools have a setup script or an environment setting file. However, I doubt either version is demanded. Android is 32-bit and IntelliJ can run in 32-bit JVMs just fine. Similarly I would be surprised if smartGIT can't use a 64-bit JVM (it wouldn't be very smart) –

2011年8月16日 · Check the Java SE 7 Archive Downloads page. The last release was update 80, therefore the 32-bit filename to download is jdk-7u80-windows-i586.exe (64-bit is named jdk-7u80-windows-x64.exe. Old Java downloads also require a sign on to an Oracle account now :-( however with some crafty cookie creating one can use wget to grab the file without ...

2014年1月21日 · This behavior is the same on both 32-bit and 64-bit JVMs. What you are seeing is the 2GB per-process address space limitation of 32-bit processes (at least, on Windows this is the limitation - it may be slightly larger on other platforms) causing this allocation to fail on 32-bit, where 64-bit has no issues since it has much larger address space.