unit testing - Android JUnitTests - Is it possible to create a public static method for Method and Field Reflections? -

i know how can access private method or field class within test class:

to access private method myclass, named void dosomething():

import java.lang.reflect.invocationtargetexception; import java.lang.reflect.method; ...  try {     method method = myclass.class.getdeclaredmethod("dosomething", (class[])null); // (class[])null parameterless methods     method.setaccessible(true);     method.invoke(localinstanceofmyclass); } catch (nosuchmethodexception ex){     ex.printstacktrace(); } catch (illegalaccessexception ex){     ex.printstacktrace(); } catch (illegalargumentexception ex){     ex.printstacktrace(); } catch (invocationtargetexception ex) {     ex.printstacktrace(); } 

to access private field myclass, named boolean myfield:

import java.lang.reflect.field; ...  try {     field field = myclass.class.getdeclaredfield("myfield");     field.setaccessible(true);     field.set(localinstanceofmyclass, true); // true value want assign myfield } catch (nosuchfieldexception ex){     ex.printstacktrace(); } catch (illegalaccessexception ex){     ex.printstacktrace(); } catch (illegalargumentexception ex){     ex.printstacktrace(); } 

(source: https://stackoverflow.com/a/34658/1682559)

as can see quite lot of code putting private boolean on true or false.

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so, question: possible somehow make 2 public static methods, 2 method , 1 field, can use in test classes? clarify:

testmethodsclass.setprivatefield(... parameters ...); testmethodsclass.runprivatevoidmethod(... parameters ...); testmethodsclass.runprivatereturnmethod(... parameters ...); 

example of parameters based on examples void dosomething() en boolean myfield above:

testmethodsclass.setprivatefield(localinstanceofmyclass, "myfield", true); testmethodsclass.runprivatevoidmethod(localinstanceofmyclass, "dosomething", null); // ps: null converted in method (class[])null` 

thanks in advance responses.

ok, pretty easy..

testmethodsclass:

import java.lang.reflect.field; import java.lang.reflect.invocationtargetexception; import java.lang.reflect.method;  public class testmethodsclass {     public static void runprivatevoidmethod(object ob, string methodname, class<?>[] parameters){         try {             method method = null;             if(parameters == null){                 class<?>[] nullparameter = (class[])null;                 method = ob.getclass().getdeclaredmethod(methodname, nullparameter);             }             else                 method = ob.getclass().getdeclaredmethod(methodname, parameters);              if(method != null){                 method.setaccessible(true);                 method.invoke(ob);             }         }         catch (nosuchmethodexception ex){             ex.printstacktrace();         }         catch (illegalaccessexception ex){             ex.printstacktrace();         }         catch (illegalargumentexception ex){             ex.printstacktrace();         }         catch (invocationtargetexception ex) {             ex.printstacktrace();         }     }      public static object runprivatereturnmethod(object ob, string methodname, class<?>[] parameters){         object returnobject = null;         try {             if(parameters == null){                 class<?>[] nullparameter = (class[])null;                 method method = ob.getclass().getdeclaredmethod(methodname, nullparameter);                 method.setaccessible(true);                 returnobject = method.invoke(ob);             }             else{                 method method = ob.getclass().getdeclaredmethod(methodname, parameters);                 method.setaccessible(true);                 method.invoke(ob);             }         }         catch (nosuchmethodexception ex){             ex.printstacktrace();         }         catch (illegalaccessexception ex){             ex.printstacktrace();         }         catch (illegalargumentexception ex){             ex.printstacktrace();         }         catch (invocationtargetexception ex) {             ex.printstacktrace();         }         return returnobject;     }      public static void setprivatefield(object ob, string fieldname, object value){         try {             field field = ob.getclass().getdeclaredfield(fieldname);             field.setaccessible(true);             field.set(ob, value);         }         catch (nosuchfieldexception ex){             ex.printstacktrace();         }         catch (illegalaccessexception ex){             ex.printstacktrace();         }         catch (illegalargumentexception ex){             ex.printstacktrace();         }     } } 

how call it:

// set private field "boolean myfield" myclass true testmethodsclass.setprivatefield(localinstanceofmyclass, "myfield", true);  // run private method "dosomething()" myclass testmethodsclass.runprivatevoidmethod(localinstanceofmyclass, "dosomething", null);  // run private method "dosomething()" myclass , assign return value local field boolean test = (boolean)testmethodsclass.runprivatereturnmethod(localinstanceofmyclass, "dosomething", null); 

i haven't tested yet, don't know if works types. strings , booleans work pretty far can tell. more testing later on, when have spare time project.