System.getProperty()方法

public class SystemProperty {
 public static void main(String args[]) {  
    System.out.println("java_vendor:" + System.getProperty("java.vendor"));  
    System.out.println("java_vendor_url:"  
             + System.getProperty("java.vendor.url"));  
    System.out.println("java_home:" + System.getProperty("java.home"));  
    System.out.println("java_class_version:"  
             + System.getProperty("java.class.version"));  
    System.out.println("java_class_path:"  
            + System.getProperty("java.class.path"));  
    System.out.println("os_name:" + System.getProperty("os.name"));  
    System.out.println("os_arch:" + System.getProperty("os.arch"));  
    System.out.println("os_version:" + System.getProperty("os.version"));  
    System.out.println("user_name:" + System.getProperty("user.name"));  
    System.out.println("user_home:" + System.getProperty("user.home"));  
    System.out.println("user_dir:" + System.getProperty("user.dir"));  
    System.out.println("java_vm_specification_version:"  
            + System.getProperty("java.vm.specification.version"));  
    System.out.println("java_vm_specification_vendor:"  
            + System.getProperty("java.vm.specification.vendor"));  
    System.out.println("java_vm_specification_name:"  
            + System.getProperty("java.vm.specification.name"));  
    System.out.println("java_vm_version:"  
            + System.getProperty("java.vm.version"));  
    System.out.println("java_vm_vendor:"  
            + System.getProperty("java.vm.vendor"));  
    System.out  
            .println("java_vm_name:" + System.getProperty("java.vm.name"));  
    System.out.println("java_ext_dirs:"  
            + System.getProperty("java.ext.dirs"));  
    System.out.println("file_separator:"  
            + System.getProperty("file.separator"));  
    System.out.println("path_separator:"  
            + System.getProperty("path.separator"));  
    System.out.println("line_separator:"  
            + System.getProperty("line.separator"));  
}