Java How to Program, Early Objects, 11th Edition

... initialized, only the constructor that the class’s other constructors call will need to be modified.

Common Programming Error 8.2

It’s a compilation error when this is used in a constructor’s body to call another of the class’s constructors if that call is not the first statement in the constructor. It’s also a compilation error when a method attempts to invoke a constructor directly via this.

Lines 16–18 declare a Time2 constructor with a single int parameter representing the hour, which is passed with 0 for the minute and second to the constructor at lines 26–42. Lines 21–23 declare a Time2 constructor that receives two int parameters representing the ...