Default Constructor in Java

Question

Which of the following two is the default constructor of Java?

public Test() {
   this.name = "";
   this.credits = 0;
   this.hours = 0;
}

public Test(String name, int credits, int hours) {
   this.name = name;
   this.credits = credits;
   this.hours = hours;
}

Please explain the difference between them as well.

Answer 1

Well, none of these is the default constructor of Java. When you say default, that means you don’t have to explicitly define it.

A default constructor is implicitly called by the JRE if there is no constructor is defined for a class. For your example, a default constructor will look something like below:

public Test()
{}