Java Common entity classes

System class

Access System Properties-traverse

1  PackageOrg.zln.usefulclass.system;2 3 Importjava.util.Properties;4 5 /**6 * Created by Sherry on 000024/6/24 23:08.7  */8  Public classTestsystemproperty {9      Public Static voidMain (string[] args) {Ten         //showsystemproperties (); One         /*get a system property*/ ASystem.out.println (System.getproperty ("Java.version")); -     } -  the     /** - * Traverse system All Properties -      */ -     Private Static voidshowsystemproperties () { +Properties Properties =system.getproperties (); - properties.list (System.out); +     } A}

D:\GitHub\tools\JavaEEDevelop\Lesson1_JavaSe_Demo1\src\org\zln\usefulclass\system\TestSystemProperty.java

Traversing environment variables

1     /**2 * Traverse Environment Variables3      */4      Public Static voidshowenvproperties () {5map<string,string> map =system.getenv ();6Iterator<string> Iterator =Map.keyset (). iterator ();7          while(Iterator.hasnext ()) {8String k =Iterator.next ();9String v =Map.get (k);TenSystem.out.println (k + ":" +v); One         } A}

Traversing environment Variables

Java Common entity classes