Why do we lose type safety when using List
and not while using List<Object>
? Aren't they basically the same thing?
EDIT: I found that the following gives a compilation error
public class TestClass
{
static void func(List<Object> o, Object s){
o.add(s);
}
public static void main(String[] args){
func(new ArrayList<String>(), new Integer(1));
}
}
whereas this doesn't
public class TestClass
{
static void func(List o, Object s){
o.add(s);
}
public static void main(String[] args){
func(new ArrayList<String>(), new Integer(1));
}
}
Why?
See Question&Answers more detail:
os 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…