Java Class - getGenericInterfaces() Method

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

Syntax

public Type[] getGenericInterfaces()

Parameters

No parameter is required.

Return Value

Returns an array of interfaces implemented by this class.

Exception

• Throws GenericSignatureFormatError, if the generic class signature does not conform to the format specified in The Java Virtual Machine Specification.
• Throws TypeNotPresentException, if any of the generic superinterfaces refers to a non-existent type declaration.
• Throws MalformedParameterizedTypeException, if any of the generic superinterfaces refer to a parameterized type that cannot be instantiated for any reason.

Example:

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

import java.lang.*;
import java.lang.reflect.*;

public class MyClass {
  public static void main(String[] args) {
    try {
      Class cls = Class.forName("java.lang.Boolean");

      //print accessible public methods
      Type t[] = cls.getGenericInterfaces();
      System.out.println("Interfaces are: ");
      for(Type i: t)
        System.out.println(i);
        
    } catch (Exception e) {
      System.out.println(e);
    }
  }
}

The output of the above code will be:

Interfaces are: 
interface java.io.Serializable
java.lang.Comparable<java.lang.Boolean>