Java OOP coding question need Help! Please fully answer the question below. publ

Question

Java OOP coding question need Help! Please fully answer the question below.

public class OOPLecture2 {

    /*** Note: We are abusing inner classes in this assignment by defining multiple classes inside the
     * OOPLecture1 class. In most cases it is better practice to define each class in a separate file ***/

    // Q1: Create an interface named "Boilable" containing an abstract method named boil() that takes no parameters and
    //     has return type void.
public interface Boilable{
public abstract void boil();
}
    // Q2: Create a concrete class named "Egg" that implements Boilable. The Egg class should have 1 instance variable
    //     that is a String named "state" that is initialized to "raw" in the default constructor. Override its boil
    //     to set the value of state to "hard boiled"
public class Egg implements Boilable{
protected String state;
public Egg(){
  this.state = "raw";
}
@Override
     public void boil(){
   this.state = "hard boiled";
}
@Override
     public String toString(){
        if(this.state = "raw"){
         System.out.println("this egg is raw");
        }
     }
}

    // Q3: Override Egg's toString method to print "this egg is raw" or "this egg is hard boiled" depending on the
    //     state of the egg.

    // Q4: Create a concrete class named "Potato" that implements Boilable. The Potato class should have 1 instance
    //     variable that is a boolean named "soft" that is initialized to false in the default constructor. Override
    //     its boil method to set the value of soft to true.

    // Q5: Override Potato's toString method to return "this potato is hard" if soft is false and "this potato is soft"
    //     if soft is true.

    public static void main(String[] args) {
        // The following code is an example of testing these inner classes
        // Uncomment this code to test your classes

//        OOPLecture2 outerInstance = new OOPLecture2();
//
//        Boilable egg = outerInstance.new Egg();
//        Boilable potato = outerInstance.new Potato();
//
//        System.out.println(egg);
//        System.out.println(potato);
//
//        System.out.println(" boiling... ");
//        egg.boil();
//        potato.boil();
//
//        System.out.println(egg);
//        System.out.println(potato);

    }

}

Note that after the toString() is where I stopped and there was mistake in what to do after that and that's where I need help to finish answering the questions PLEASE HELP.

Explanation / Answer

Ans

/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/

package javaapplication6;

/**
*
* @author Rashmi Tiwari
*/

public class OOPLecture2 {
class Egg implements Boilable{

String state;
Egg(){
state="raw";
}
@Override
public void boil() {
this.state="Hard-Boiled";
}
  
public String toString(){
if(this.state.equals("raw")){
return "This Egg is Raw";
}
else{
return "This Egg is Hard Boiled";
}
}
}
class Potato implements Boilable{

Boolean soft;
Potato(){
soft=false;
}
@Override
public void boil() {
soft=true;
}
  
public String toString(){
if(soft==false){
return "This Potato is hard";
}
else{
return "This Potato is soft";
}
}
}
public static void main(String args[]){
OOPLecture2 outerInstance = new OOPLecture2();
Boilable egg = outerInstance.new Egg();
Boilable potato = outerInstance.new Potato();

System.out.println(egg);
System.out.println(potato);

System.out.println(" boiling... ");
egg.boil();
potato.boil();

System.out.println(egg);
System.out.println(potato);
}
}

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