JAVA There are two types of Students: Sleepy, Grumpy. Students are mostly simila

Question

JAVA

There are two types of Students: Sleepy, Grumpy. Students are mostly similar, but a little bit different. All students have a current happiness factor which is between in 10 and -100 (initially 0). They all respond to the flame() message when they are flamed by e-mail. Here's what they do when flamed:

1. Print "ouch" and decrement happiness by 1, unless it is already at -100. Sleepy grad students are a little different— they go through the above process twice.

2. Then they read their favorite newsgroup to relax (print "reading"). This causes the happiness factor to go up by 4, although it never goes above 10. In addition, the Grumpy grad student posts to the newsgroup after reading (print "posting").

Write the code for Sleepy, Grumpy, and any support classes. You may omit constructors, and don't worry about the public/private/etc. keywords. Just write the code required by the flame() message, and use inheritance to minimize code repetition. The goal is to demonstrate design so please be careful about what classes/methods you choose to implement

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Explanation / Answer

//This class acts as super class
//for Sleepy and Grumpy classes
//Student.java
public abstract class Student {

   private int happiness;
  
   public Student() {
       //set happiness=0
       happiness=0;
   }
  
   //Students responds to flame
   public void flame()
   {
       ouch();
       read();
   }
   //wrire ouch tha prints reading
       //and decrements hapiness by 1
   public void ouch() {
       System.out.println("ouch");
       happiness=happiness-1;
       if(happiness<-100)
           happiness=-100;
      
   }
   //wrire read tha prints reading
   //and increments hapiness by 4
   public void read() {
       System.out.println("reading");
       happiness=happiness+4;
       if(happiness>10)
           happiness=10;
      
   }
}

------------------------------------------------------------------------------

//Sleepy.java
//The class Sleepy inherites from Student
public class Sleepy extends Student
{
   public void ouch()
   {
       //calling ouch two times
       super.ouch();
       super.ouch();
   }
}

------------------------------------------------------------------------------

//Grumpy.java extends the student class
public class Grumpy extends Student
{
   public void read()
   {
       //calling read one time
       super.read();
       //print posting
       System.out.println("posting");
   }  
}

------------------------------------------------------------------------------

//Tester.java
public class Tester
{
   public static void main(String[] args)
   {
       //Create an array of Student of type abstract dclass
       Student[] std=new Student[2];
      
       //Set Sleepy object
       std[0]=new Sleepy();
       //Set Grummy object
       std[1]=new Grumpy();
      
       System.out.println("Sleepy responding to flame");
       //call flame method for sleepy
       std[0].flame();
      
       System.out.println("Grumpy responding to flame");
       //call flame method for grummy
       std[1].flame();
      
   }
}

------------------------------------------------------------------------------

Sample output:

Sleepy responding to flame
ouch
ouch
reading
Grumpy responding to flame
ouch
reading
posting

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