No Constructor

Learning Outcomes

If you provide no constructor then Java provides a default one for you with no args. You can create instances of “Rock” even though it has not explicit constructor.

1. Create a class called Rock.java

package com.ait.wk5;

public class Rock {

}

1. Add the class SimpleConstructor.java and run it.

package com.ait.wk5;

public class SimpleConstructor {

    public static void main(String[] args) {
        for (int i=1; i<=5;i++) {
            System.out.println("Creating instance "+i+" of Rock");
            Rock rock = new Rock();
        }
    }    
}

Creating instance 1 of Rock
Creating instance 2 of Rock
Creating instance 3 of Rock
Creating instance 4 of Rock
Creating instance 5 of Rock

---

Rock.java
SimpleConstructor.java