How to Call One Constructor from Another in Java

In Java, it is common to encounter situations where multiple constructors are needed for a single class. This may be because a class can be initialized with different sets of parameters. To avoid redundancy, it is possible to call one constructor from another, reducing duplication and ensuring consistent initialization logic. This is known as constructor chaining.

In this post, we’ll explore how to call one constructor from another within the same class and the rules associated with it.

Constructor Chaining: The Basics

In Java, constructors can be overloaded—meaning a class can have multiple constructors with different parameter lists. When one constructor calls another, it is known as constructor chaining. To achieve this, we use the keyword this(). The this() keyword allows us to invoke another constructor of the same class from within a constructor.

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