Question

Use this code to answer the following questions:

          Object obj;

          String str;

          Song sng = new Song("Rockstar", 5);

          obj = sng;              // #7

          sng = str;              // #8

          str = (String) obj;     // #9

          sng = obj;              // #10

1a)  Write the start of the class declaration for a node in a linked list (give the name of the class and the instance variables). The name of the node should be SpecialNode. The data in each SpecialNode will include both a String and a Song object.

b)  Using the SpecialNode class you created in question #11, write a constructor forSpecialNode that has three parameters and initializes all the SpecialNode instance variables.

c)  Write a line of code to instantiate a SpecialNode object to initialize the SpecialNodeinstance variables. Use the constructor you wrote in the previous question.

Song rockstar = new Song("Rockstar", 5);

SpecialNode sn = ___________________________________ ;

Answer 1

1a)  Write the start of the class declaration for a node in a linked list (give the name of the class and the instance variables). The name of the node should be SpecialNode. The data in each SpecialNode will include both a String and a Song object.

Ans:

Class SpecialNode {

String str;

Object obj;

obj sng;

}

b)  Using the SpecialNode class you created in question #11, write a constructor forSpecialNode that has three parameters and initializes all the SpecialNode instance variables.

Ans: SpecialNode(string,object,song) {

str = string;

obj = object;

sng = song;

}

c)  Write a line of code to instantiate a SpecialNode object to initialize the SpecialNodeinstance variables. Use the constructor you wrote in the previous question.

Song rockstar = new Song("Rockstar", 5);

SpecialNode sn = new SpecialNode("Rockstar",6,rockstar);

//Here, we took 3 parameters, so Rockstar is a string, 6 is an object, and rockstar is the Song which is already defined in the question (Song rockstar = new Song("Rockstar", 5))

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