You can add multiple constructors in Java.

MULTIPLE CONSTRUCTORS JAVA

As in the example with the trees. You initialise the moment that you create the new object.

package ConstructorExplanation;

public class Tree {
	double heightTree;

	Tree(double inputHeight) {
		heightTree = inputHeight;
	}
}

Therefore, you add a value when you create the object

package ConstructorExplanation;

public class Main {

	void start () {
		Tree upperHalf = new Tree(2.5);
		Tree lowerHalf = new Tree(2.5);
	}
	
	public static void main(String[] args) {
		new Main().start();
	}

}

Theory

I can add multiple extra constructors with other parameters

example

Besides height, I can also make a constructor with variable typeOfPlant.

package ConstructorExplanation;

public class Tree {
	double heightTree;
	String typeOfPlant;

	Tree(double inputHeight) {
		heightTree = inputHeight;
	}
	Tree(double inputHeight, String inputType) {
		heightTree = inputHeight;
		typeOfPlant = inputType;
	}
}

How does java know which constructor I need when I create a new object?

Java checks the parameters you put in:

package ConstructorExplanation;

public class Main {

	void start () {
		Tree smallTree = new Tree(2.5);
		
		Tree bigPalm = new Tree(5, "palm tree");
	}
	
	public static void main(String[] args) {
		new Main().start();
	}

}

Now Java created 2 objects:

trees java

THEREFORE,

Something like this will not work, because now Java doesn’t know which constructor you want to call:multiple constructors wrong