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For any Java class, if we are allowed to create only one object, then such type of class is called a singleton class. For example, Runtime and ServiceLocator are singleton classes. We can implement a Singleton class using a private constructor. The advantage of Singleton class: Memory utilization and Performance improvement If several people have …

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Overloaded constructors exist in Java. Within a class, we can declare multiple constructors. All these constructors are having the same name but different type of arguments. Hence, all these constructors are considered overloaded constructors. Hence, overloading concept is applicable to constructors. Example of Overloaded Constructors // Demo class class Demo { // defining three overloaded …

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Constructors are used for the purpose of object initialization. Once we create an object, it is a good practice to initialize the object. Then only the object is in a position to respond properly. It is not considered a good practice to initialize an object at the time of declaration or inside the instance block. …

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A default constructor is automatically generated when the programmer has not specified any constructors explicitly. The compiler is responsible to generate default constructor but not JVM. Also, the compiler will generate default constructor if and only if the class does not contain a constructor. If there is at least one constructor inside the class, then …

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Instance Control Flow and Static Control Flow are both very important control mechanisms in Java. We know that first Static Control Flow takes place and only after an Object Creation, Instance Control Flow takes place. In this tutorial, we will understand how both control mechanisms work simultaneously through an example. // Main Class public class Demo …

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