Scope of Generic Method Type Parameters
Generic method can appear in either a generic or nongeneric class. For example, the following program declares a generic class called Gen and a generic method within that class called showUV( ). The showUV( ) method has its own parameter type declaration that defines the type variable U and V. The scope of U and V is limited to the method showUV( ) and hides any definition of U and V in Gen class.
Program
class Gen<U, V> {
private U u;
private V v;
Gen(U uu, V vv) {
u = uu;
v = vv;
}
void showGenUV() {
System.out.println("Gen U : " + u.getClass().getName());
System.out.println("Gen V : " + v.getClass().getName());
}
<U, V> void showUV(U u, V v) {
System.out.println("U : " + u.getClass().getName());
System.out.println("V : " + v.getClass().getName());
}
}
public class Javaapp {
public static void main(String[] args) {
Gen<Float, Double> gobj = new Gen<Float, Double>(4.5f, 7.5);
gobj.showGenUV();
gobj.showUV(50, "Ten");
}
}