获取JVM的系统环境

public class TestSystemGetProperty {
    
    public static void main(String[] args) {
    
        System.out.println("java版本号：" + System.getProperty("java.version"));
        System.out.println("Java提供商名称：" + System.getProperty("java.vendor")); 
        System.out.println("Java提供商主页：" + System.getProperty("java.vendor.url"));
        System.out.println("jre目录：" + System.getProperty("java.home")); 
        System.out.println("Java虚拟机规范版本号：" + System.getProperty("java.vm.specification.version")); 
        System.out.println("Java虚拟机规范提供商：" + System.getProperty("java.vm.specification.vendor")); 
        System.out.println("Java虚拟机规范名称：" + System.getProperty("java.vm.specification.name")); 
        System.out.println("Java虚拟机版本号：" + System.getProperty("java.vm.version")); 
        System.out.println("Java虚拟机提供商：" + System.getProperty("java.vm.vendor")); 
        System.out.println("Java虚拟机名称：" + System.getProperty("java.vm.name")); 
        System.out.println("Java规范版本号：" + System.getProperty("java.specification.version")); 
        System.out.println("Java规范提供商：" + System.getProperty("java.specification.vendor")); 
        System.out.println("Java规范名称：" + System.getProperty("java.specification.name")); 
        System.out.println("Java类版本号：" + System.getProperty("java.class.version")); 
        System.out.println("Java类及lib的路径：" + System.getProperty("java.class.path")); 
        System.out.println("系统的classpath：" + System.getProperty("java.library.path")); 
        System.out.println("Java输入输出临时路径：" + System.getProperty("java.io.tmpdir")); 
        System.out.println("Java编译器：" + System.getProperty("java.compiler")); 
        System.out.println("Java执行路径：" + System.getProperty("java.ext.dirs")); 
        System.out.println("操作系统名称：" + System.getProperty("os.name")); 
        System.out.println("操作系统的架构：" + System.getProperty("os.arch")); 
        System.out.println("操作系统版本号：" + System.getProperty("os.version")); 
        System.out.println("目录分隔符：" + System.getProperty("file.separator")); 
        System.out.println("path分隔符：" + System.getProperty("path.separator")); 
        System.out.println("直线分隔符：" + System.getProperty("line.separator")); 
        System.out.println("操作系统用户名：" + System.getProperty("user.name")); 
        System.out.println("当前用户的主目录：" + System.getProperty("user.home")); 
        System.out.println("当前程序所在目录：" + System.getProperty("user.dir")); 
    }
}