System.getProperty

只貼代碼吧

package jijian.test;

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"));   
	}
}   

結果

java_vendor:Oracle Corporation
java_vendor_url:http://java.oracle.com/
java_home:D:\WorkApp\JDK832
java_class_version:52.0
java_class_path:D:\Workspace2\testUdp\bin
os_name:Windows 8.1
os_arch:x86
os_version:6.3
user_name:jijian
user_home:C:\Users\jijian
user_dir:D:\Workspace2\testUdp
java_vm_specification_version:1.8
java_vm_specification_vendor:Oracle Corporation
java_vm_specification_name:Java Virtual Machine Specification
java_vm_version:25.25-b02
java_vm_vendor:Oracle Corporation
java_vm_name:Java HotSpot(TM) Client VM
java_ext_dirs:D:\WorkApp\JDK832\lib\ext;C:\windows\Sun\Java\lib\ext
file_separator:\
path_separator:;
line_separator: