java - Random Element as input and get the Value -

i don't know if it's duplicated question cause i've found nothing , didn't know keywords should i've been searching.

i want have class gets element input , shows value of element.

for example:

public void showvalue(object obj){     system.out.println("output: " + obj.getvalue()); } 

and then:

nativeselect ns=new nativeselect(); textfield tf=new textfield();  ns.addvalue("name"); ns.select("name");  tf.setvalue("lastname");  showvalue(ns); showvalue(tf); 

and have output:

output: name output: lastname 

could maybe me or give me idea how should that! i'm new java , started programming after long time.

thanks alot!

you want function can print value of every field. this:

public static void showvalue(field f) {    system.out.println("output: "f.getvalue()); //will print via console    new notification("output: "+f.getvalue()).show(page.getcurrent());     //will show text box in current page } 

as field docs (link), every field has getvalue(). should take care value types use in fields should have overriden tostring method doesn't show default tostring.