java - Abstract class implementing an interface doesnt require method implementation. Why? -

i writing class going implement interface - interface has 1 method defined in it. when write class definition , write implements interfaceservice after class declaration , end definition , close brackets of class without overriding interface method.. compiles fine. there no compilation error , able save implementing class in eclipse. why so? shouldn't implementing class forced override method? here interface , implementing class definitions:

interface:

public interface interfaceservice{     list<map<string, object>> dosearch(searchvo formvo,string indexname,string type)             throws searchexception;     long gettotalhitcount(); } 

class:

public abstract class clientflagsearch implements searchservice{  } 

i have feeling has defining implementing class abstract. why?

shouldn't implementing class forced override method?

no, abstract class not have implement every method of interface. methods choose not implement remain abstract , have implemented further down inheritance tree.

if clientflagsearch not abstract, indeed have implement every method of searchservice.