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Class getEnclosingConstructor() method in Java with Examples
  • Last Updated : 28 Nov, 2019

The getEnclosingConstructor() method of java.lang.Class class is used to get the enclosing constructors of this class. The method returns the enclosing constructors of this class, if this class is a local class or anonymous class declared in that constructor. Else this method returns null.

Syntax:

public Constructor getEnclosingConstructor()

Parameter: This method does not accept any paramter.

Return Value: This method returns the enclosing constructor of this class if this class is a local class or anonymous class declared in that constructor. Else this constructor returns null.

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



Below programs demonstrate the getEnclosingConstructor() method.

Example 1:




// Java program to demonstrate
// getEnclosingConstructor() 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 enclosing constructors of myClass
        // using getEnclosingConstructor() constructor
        System.out.println("EnclosingConstructor of myClass: "
                           + myClass.getEnclosingConstructor());
    }
}
Output:
Class represented by myClass: class Test
EnclosingConstructor of myClass: null

Example 2:




// Java program to demonstrate
// getEnclosingConstructor() method
  
import java.util.*;
  
class Main {
  
    public Object obj;
  
    Main()
    {
  
        class Arr {
        };
  
        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 enclosing constructors of myClass
        // using getEnclosingConstructor() constructor
        System.out.println("EnclosingConstructor of myClass: "
                           + myClass.getEnclosingConstructor());
    }
}
Output:
EnclosingConstructor of myClass: Main()

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

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