Class getTypeParameters() method in Java with Examples

Last Updated : 27 Jan, 2022

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() method

import java.util.*;

public class Test {
    public static void main(String[] args)
        throws ClassNotFoundException
    {

        // returns the Class object for this class
        Class myClass = Class.forName(&quot;Test&quot;);

        System.out.println(&quot;Class represented by myClass: &quot;
                           + myClass.toString());

        // Get the type parameters of myClass
        // using getTypeParameters() method
        System.out.println(
            &quot;TypeParameters of myClass: &quot;
            + Arrays.toString(
                  myClass.getTypeParameters()));
    }
}

Output:

Class represented by myClass: class Test
TypeParameters of myClass: []

Example 2:

Java

// Java program to demonstrate getTypeParameters() method

import java.util.*;

public class Test {

    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object for this class
        Class myClass = Class.forName(&quot;java.lang.Integer&quot;);

        System.out.println(&quot;Class represented by myClass: &quot;
                           + myClass.toString());

        // Get the type parameters of myClass
        // using getTypeParameters() method
        System.out.println(
            &quot;TypeParameters of myClass: &quot;
            + 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--

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Class getTypeParameters() method in Java with Examples

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