It explains the order in which the messages are output on your screen. The example shows how you can use three different constructors in the same class: one with no argument, one with only one argument, and the third with two arguments.Ī very interesting point to consider in this example is how the constructors are called. Running this code will produce the following output: This is the no-arg constructor. ("You passed two arguments: " + var2 + " and " + var3) ĬhainWithinClass chainObj = new ChainWithinClass(2,4) There also needs to be at least one constructor that does not use the statement this().Ĭonsider the Java example below showing how to chain constructors in the same class: It is important for you to note that when using this() to call a constructor, it should always be the first statement in the calling constructor. If the constructor you are calling takes some arguments, then include them in the round brackets of this(). To call one of the constructors in another constructor (of the same class), use the keyword this(). You can create multiple constructors in the same class, each with a different number of arguments that it accepts. Java Constructor Chaining in the Same Class In this Java programming tutorial, you will learn the three ways in which you can carry out constructor chaining. For the latter, the constructor should be through inheritance from the super class. You can use a constructor chain either within the same class or even with another one. Constructor chaining refers to the ability to call a constructor inside another constructor.
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