Sometimes we do not want whole class to be parameterized, in that case we can use generics type in methods also. Since constructor is a special kind of method, we can use generics type in constructors too.
The following program showing example of generics type in method.
Generics in Methods and Constructors
class GenericsTypesInMethod
{
public static <T> boolean areEqual(GenericsType<T> t1, GenericsType<T> t2)
{
return t1.get().equals(t2.get());
}
public static void main(String args[])
{
GenericsType<String> firstString = new GenericsType<String>();
firstString.set("MeritCampus");
GenericsType<String> secondString = new GenericsType<String>();
secondString.set("MeritCampus");
boolean areEqual;
areEqual = GenericsTypesInMethod.areEqual(firstString, secondString); // LINE A
System.out.println("Are the given two strings equal ? " +areEqual );
}
}
class GenericsType<T>
{
private T object;
public T get()
{
return this.object;
}
public void set(T object)
{
this.object = object;
}
}
OUTPUTAre the given two strings equal ? true
DESCRIPTIONHere, notice the areEqualmethod signature showing syntax to use generics type in methods.
THINGS TO TRY
- Replace code at
LINE A with areEqual = GenericsTypesInMethod.<String>areEqual(firstString, secondString); run the program and see it also gives same result.
Generics in Methods and Constructors
