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安装的jvm是64位还是32位

发布于 2024-10-10 02:37:02 字数 63 浏览 0 评论 0原文

如何确定安装的 Java 版本是 64 位 还是 32 位？

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给妤﹃绝世温柔 2024-10-17 02:37:02

在命令行中输入java -version。如果是 64 位它会这样说，否则它是 32 位。

例如

64 位 Oracle / Mac OS X

$ java -version

java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065)
Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01-279, mixed mode)

32 位 Oracle / Mac OS X（客户端）

$ java -version

java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065)
Java HotSpot(TM) Client VM (build 16.3-b01-279, mixed mode, sharing)

32 位 Oracle / Mac OS X（服务器）

$ java -server -version

java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065)
Java HotSpot(TM) Server VM (build 16.3-b01-279, mixed mode)

64 位 OpenJDK Ubuntu

$ java -version

java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.1) (6b20-1.9.1-1ubuntu3)
OpenJDK 64-Bit Server VM (build 17.0-b16, mixed mode)

32 位 Soylatte Mac OS X

$ java -version

java version "1.6.0_03-p3"
Java(TM) SE Runtime Environment (build 1.6.0_03-p3-landonf_19_aug_2008_14_55-b00)
Java HotSpot(TM) Client VM (build 1.6.0_03-p3-landonf_19_aug_2008_14_55-b00, mixed mode)

32 位 OpenJDK Mac OS X

$ java -version

openjdk version "1.6.0-internal"
OpenJDK Runtime Environment (build 1.6.0-internal-landonf_17_may_2009_13_58-b00)
OpenJDK Client VM (build 11.0-b17, mixed mode)

64 位 IBM Linux

$ java -version

java version "1.6.0"
Java(TM) SE Runtime Environment (build pxa6460sr8fp1-20100624_01(SR8 FP1))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux amd64-64 jvmxa6460sr8ifx-20100609_59383 (JIT enabled, AOT enabled)

Enter java -version on the command line. If it's 64-bits it will say so, otherwise it's 32-bits.

E.g.

64 bits Oracle / Mac OS X

$ java -version

java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065)
Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01-279, mixed mode)

32 bits Oracle / Mac OS X (client)

$ java -version

java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065)
Java HotSpot(TM) Client VM (build 16.3-b01-279, mixed mode, sharing)

32 bits Oracle / Mac OS X (server)

$ java -server -version

java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065)
Java HotSpot(TM) Server VM (build 16.3-b01-279, mixed mode)

64 bits OpenJDK Ubuntu

$ java -version

java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.1) (6b20-1.9.1-1ubuntu3)
OpenJDK 64-Bit Server VM (build 17.0-b16, mixed mode)

32 bits Soylatte Mac OS X

$ java -version

java version "1.6.0_03-p3"
Java(TM) SE Runtime Environment (build 1.6.0_03-p3-landonf_19_aug_2008_14_55-b00)
Java HotSpot(TM) Client VM (build 1.6.0_03-p3-landonf_19_aug_2008_14_55-b00, mixed mode)

32 bits OpenJDK Mac OS X

$ java -version

openjdk version "1.6.0-internal"
OpenJDK Runtime Environment (build 1.6.0-internal-landonf_17_may_2009_13_58-b00)
OpenJDK Client VM (build 11.0-b17, mixed mode)

64 bits IBM Linux

$ java -version

java version "1.6.0"
Java(TM) SE Runtime Environment (build pxa6460sr8fp1-20100624_01(SR8 FP1))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux amd64-64 jvmxa6460sr8ifx-20100609_59383 (JIT enabled, AOT enabled)

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盛夏已如深秋| 2024-10-17 02:37:02

您可以获得 os.arch 属性：

String osArch = System.getProperty("os.arch");

这将告诉您操作系统的体系结构，因此不完全是虚拟机的体系结构。

Sun 的 JRE 具有以下可能有用的属性（来自我的计算机的值）：

sun.arch.data.model : 32
sun.cpu.isalist : pentium_pro+mmx pentium_pro pentium+mmx pentium i486 i386 i86

但请记住，这些属性不适用于其他供应商的 VM。因此，您可能也想找到其他虚拟机的此类属性，这样您就不会依赖于供应商。

You can get the os.arch property:

String osArch = System.getProperty("os.arch");

This will tell you the architecture of the OS, so not exactly the one of the VM.

Sun's JREs have the following properties (values from my machine) that may be useful:

sun.arch.data.model : 32
sun.cpu.isalist : pentium_pro+mmx pentium_pro pentium+mmx pentium i486 i386 i86

But have in mind that these will not work on VMs from other vendors. So you may want to find such properties of other VMs as well, so that you are not vendor-dependent.

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