Java之获取系统属性

 import java.util.Enumeration;
 import java.util.Properties;

 public class Example609 {
     public static void main(String[] args) {
         // TODO Auto-generated method stub
         Properties properties = System.getProperties();
         Enumeration propertiesNames = properties.propertyNames();
         while (propertiesNames.hasMoreElements()) {
             String key = (String) propertiesNames.nextElement();
             String value = System.getProperty(key);
             System.out.println(key+"->"+value);
         }

     }

 }