Java.lang.Class.getGenericInterfaces() Method

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Description

The java.lang.Class.getGenericInterfaces() returns the Types representing the interfaces directly implemented by the class or interface represented by this object.

Declaration

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

public Type[] getGenericInterfaces()

Parameters

NA

Return Value

This method returns an array of interfaces implemented by this class.

Exception

• GenericSignatureFormatError − If the generic class signature does not conform to the format specified in the Java Virtual Machine Specification, 3rd edition.

• TypeNotPresentException − If any of the generic superinterfaces refers to a non-existent type declaration

• MalformedParameterizedTypeException − if any of the generic superinterfaces refer to a parameterized type that cannot be instantiated for any reason.

Example

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

package com.tutorialspoint;

import java.lang.reflect.*;

public class ClassDemo {

   public static void main(String []args) {         

      ClassDemo d = new ClassDemo();
      Class c = d.getClass();

      Type[] t = c.getGenericInterfaces();
      if(t.length != 0) {
         for(Type val : t) {
            System.out.println(val.toString());
         }
      } else {
         System.out.println("Interfaces are not implemented...");
      }
   }
}

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

Interfaces are not implemented...