The getTypeParameters() method of java.lang.Class class is used to get the type parameters of this entity. This entity can be a class, an array, an interface, etc. The method returns an array of TypeVariable objects representing the type variables.
Syntax:
public TypeVariable<Class<T>> getTypeParameters()
Parameter: This method does not accept any parameter.
Return Value: This method returns an array of TypeVariable objects representing the type variables.
Below programs demonstrate the getTypeParameters() method.
Example 1:
Java
// Java program to demonstrate getTypeParameters() methodimport java.util.*;public class Test { public static void main(String[] args) throws ClassNotFoundException { // returns the Class object for this class Class myClass = Class.forName("Test"); System.out.println("Class represented by myClass: " + myClass.toString()); // Get the type parameters of myClass // using getTypeParameters() method System.out.println( "TypeParameters of myClass: " + Arrays.toString( myClass.getTypeParameters())); }} |
Output:
Class represented by myClass: class Test TypeParameters of myClass: []
Example 2:
Java
// Java program to demonstrate getTypeParameters() methodimport java.util.*;public class Test { public static void main(String[] args) throws ClassNotFoundException { // returns the Class object for this class Class myClass = Class.forName("java.lang.Integer"); System.out.println("Class represented by myClass: " + myClass.toString()); // Get the type parameters of myClass // using getTypeParameters() method System.out.println( "TypeParameters of myClass: " + Arrays.toString( myClass.getTypeParameters())); }} |
Output:
Class represented by myClass: class java.lang.Integer TypeParameters of myClass: []
Reference: https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#getTypeParameters–