超类public abstract Class Test { abstract public List getList();}子类public Class TestImpl extends Test { public List getList(){ return null;} }ide提示method does not override method form its superclass
public class Student{ String name;Float score;public void setName(String_name){ name=_name;} public String getName(){ return name;} public void setScore(Float_score){ score=_score;} public float getScore(){ return score;...
import java.util.ArrayList;import java.util.List;public class ListTest { public List coursesToSelec;public ListTest(){ this.coursesToSelect=new ArrayList();}*/coursesToSelect=new ArrayList();把上面的内容注释掉,换成这段...