Java implementation reflection, dynamic configuration

java  Implement reflection//first define an interface Ishow.javapublic interface ishow () {    void show ( STRING STR);} Establish an Demo.java file implementation interface Public class demo implements ishow{    public  void show (STRING STR) {        ssytem.out.println (str);     }}//build Test.java file to test Public class test{public static void main (string args[]) {    string str = "P1.demo";   //Package name + reflected class name     try () {     class c1 =class.forname (str);     try () {         ishow a =c1.newinstance ();    //      class loading mechanism         a.show ("QQ");     }catch ( Instantiationexception e) {        E.PRINTSTACKTRAce ();     }catch (illegalaccessexception e) {         e.printstacktrace ();     }catch (classnotfoundexception e) {          e.printstacktrace ();             }        }    }}//java Implementing Dynamic Configuration   Implement reflection//ishow  and demo  invariant Public interface ishow () {    void show ( STRING STR);} Public class demo implements ishow{    public void show ( STRING STR) {        ssytem.out.println (str);     }} Build propertiesutil.javaimport java.util.properties;public class propertiesutil{     properties p = new properties ();  //new  a Properties object   &nBsp; try () {        p.load ( PropertiesUtil.class.getResourceAsStream ("show.properties")); load Show.properties    }catch ( Ioexception e) {    e.printstacktrace ();    }     return p;} Build  show.properties file show=p1.demo//build Test.java file to test public class test{public static  Void main (string args[]) {///Here the package + class name is loaded through the dynamic file Show.properties    properties p  =properties.getshowproperties ();    string str = p.getproperty ("show");     try () {    class c1 =class.forname (str);     try () {        ishow a =c1.newinstance ();     //     class loading mechanism         a.show ("QQ");     }catch (INSTANTIATIONEXCEPTion e) {        e.printstacktrace ();     } catch (illegalaccessexception e) {        e.printstacktrace ();     }catch (classnotfoundexception e) {          e.printstacktrace ();            }         }    }}

Java implementation reflection, dynamic configuration