Class isInterface() method in Java with Examples
Last Updated :
05 Apr, 2023
Improve
The isInterface() method of java.lang.Class class is used to check if this Class is an interface. The method returns true if this Class is an interface. It returns false otherwise.
Syntax:
Java
Java
public boolean isInterface()Parameter: This method does not accept any parameter. Return Value: This method returns true if this Class is an interface. It returns false otherwise. Below programs demonstrate the isInterface() method. Example 1:
// Java program to demonstrate isInterface() method
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());
// Check if this class is an interface
// using isInterface() method
System.out.println("Is Test an interface: "
+ myClass.isInterface());
}
}
// Java program to demonstrate isInterface() methodpublic 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()); // Check if this class is an interface // using isInterface() method System.out.println("Is Test an interface: " + myClass.isInterface()); }}
Output:
Example 2:
Class represented by myClass: class Test Is Test an interface: false
// Java program to demonstrate isInterface() method
interface T {
}
public class Test {
public static void main(String[] args)
throws ClassNotFoundException
{
// returns the Class object for this class
Class myClass = Class.forName("T");
// Check if T is an interface
// using isInterface() method
System.out.println("Is T an interface: "
+ myClass.isInterface());
}
}
// Java program to demonstrate isInterface() methodinterface T {}public class Test { public static void main(String[] args) throws ClassNotFoundException { // returns the Class object for this class Class myClass = Class.forName("T"); // Check if T is an interface // using isInterface() method System.out.println("Is T an interface: " + myClass.isInterface()); }}
Output:
Reference: https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#isInterface--
Is T an interface: true
