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javaobjectabstract-class

Assigning a value to an object in Java

I have 3 classes (abstract) Number, One (extends Number), Next (extends Number). I want to assign value 1 to object of type One so that calling:

Number one = new One();
Number four = new Next(new Next(new Next(one)));
System.out.println(one.toString());
System.out.println(four.toString()):`

prints:

1
n(n(n(1)))
Solution

  • If I get what you're asking, override the Object.toString method.

    In One: 

     @Override public String toString() {
     return "1";
 }

    In Next: 

     @Override public String toString() {
     return "n("+next+")";
 }

    Assuming you Next field for the next node is called next.

    You may also wish to make toString abstract in Number:

     @Override public abstract String toString();