Java constructor in a method11/14/2023 Declaration of this keyword without the parameter. ("James Gosling is known as Father of Java programming language.") This("Java", 1995) // It will call two parameters constructor within the same class. Declaration of this keyword with two parameters list. Creating one paramterized constructor. Creating non-parameterized constructor. Program code 1: package constructorProgram Look at the program source code and follows all steps explained in the coding. We will call the current class constructor using this keyword. Let’s take an example program where we will create constructor chaining. Java Constructor chaining can be done in any order. There must be at least one constructor without this keyword.Ĥ. Otherwise java compiler will generate this error message: Exception in thread “main” : Unresolved compilation problem: Constructor call must be the first statement in the constructor.ģ. this() keyword must be in the first line of the constructor to call the same or current class constructor. We must use this () keyword to call the current class constructor because Java compiler never puts automatically this() keyword like a super() keyword.Ģ.
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