Body () { idNum = nextID++; }
Body sun = new Body(); // idNum is 0 Body earth = new Body(); // idNum is 1
public class ParentClass { public ParentClass() { System.out.println( "ParentClass constructor was called" ); } } public class ChildClass extends ParentClass { public ChildClass() { System.out.println( "ChildClass constructor was called" ); } } public class Main { public static void main(String[] args) { ChildClass cc = new ChildClass(); } }