Java.lang.Class.getTypeParameters() Method

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Description

The java.lang.Class.getTypeParameters() returns an array of TypeVariable objects that represent the type variables declared by the generic declaration represented by this GenericDeclaration objece.It returns an array of length 0 if the underlying generic declaration declares no type variables.

Declaration

Following is the declaration for java.lang.Class.getTypeParameters() method

public TypeVariable<Class<T>>[] getTypeParameters()

Parameters

NA

Return Value

This method returns an array of TypeVariable objects that represent the type variables declared by this generic declaration.

Exception

GenericSignatureFormatError − if the generic signature of this generic declaration does not conform to the format specified in the Java Virtual Machine Specification, 3rd edition.

Example

The following example shows the usage of java.lang.Class.getTypeParameters() method.

package com.tutorialspoint;

import java.lang.*;

public class ClassDemo {

   public static void main(String[] args) throws Exception {

      // returns an array of TypeVariable object
      TypeVariable[] tValue = List.class.getTypeParameters();
      System.out.println(tValue[0].getName());
   }
} 

Let us compile and run the above program, this will produce the following result −

E