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Class getDeclaringClass() method in Java with Examples

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  • Last Updated : 28 Nov, 2019
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The getDeclaringClass() method of java.lang.Class class is used to get the declaring class of this class. The method returns the declaring class of this class, if this class or interface is a member of another class. Else this method returns null.

Syntax:

public Constructor getDeclaringClass()

Parameter: This method does not accept any parameter.

Return Value: This method returns the declaring class of this class if this class or interface is a member of another class. Else this method returns null.

Exception This method throws SecurityException if a security manager is present and the security conditions are not met.

Below programs demonstrate the getDeclaringClass() method.

Example 1:




// Java program to demonstrate getDeclaringClass() 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("Test");
  
        System.out.println("Class represented by myClass: "
                           + myClass.toString());
  
        // Get the declaring class of myClass
        // using getDeclaringClass() constructor
        System.out.println("DeclaringClass of myClass: "
                           + myClass.getDeclaringClass());
    }
}

Output:

Class represented by myClass: class Test
DeclaringClass of myClass: null

Example 1:




// Java program to demonstrate getDeclaringClass() method
  
import java.util.*;
  
class Main {
  
    class Arr {
    };
  
    public Object obj;
  
    Main()
    {
  
        obj = new Arr();
    }
  
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        Main t = new Main();
  
        // returns the Class object
        Class myClass = t.obj.getClass();
  
        // Get the declaring class of myClass
        // using getDeclaringClass() constructor
        System.out.println("DeclaringClass of myClass: "
                           + myClass.getDeclaringClass());
    }
}

Output:

DeclaringClass of myClass: class Main

Reference: https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#getDeclaringClass–


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