Intro to JAVA Simple Programing 1. Please write the code according to the instru

Question

Intro to JAVA Simple Programing 1.

Please write the code according to the instruction, such as line of code required etc, in bold.

import java.util.Stack ;

/**

Practices using the Stack from the Java API.

*/

public class StackApiTester

{

public static void main(String[] args)

{

Stack<String> stack = new Stack<String>() ;

stack.push("horse") ;

stack.push("cat") ;

stack.push("dog") ;

stack.push("cow") ;

stack.push("mouse") ;

System.out.println(stack.pop()) ;

System.out.println(stack.pop()) ;

System.out.println(stack.pop()) ;

System.out.println(stack.peek()) ;

System.out.println("stack is empty? " + stack.isEmpty()) ;

System.out.println(stack.pop()) ;

System.out.println("stack is empty? " + stack.isEmpty()) ;

System.out.println(stack.pop()) ;

System.out.println("stack is empty? " + stack.isEmpty()) ;

//-----------Start below here. To do: approximate lines of code = 8

// 1. make a stack that holds integers ;

//2. push in the integers from 1 to 100 that are divisible by 3 ;

//3. print the size ;

//4. while stack not empty ;

//5. let value hold pop ;

//6. if value divisible by 9 then print it.

//-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions.

}

}

Explanation / Answer

/*Modified java program that implements
* the comments provided in the program.*/
//StackApiTester.java
import java.util.Stack ;
public class StackApiTester
{
   public static void main(String[] args)
   {
       Stack<String> stack = new Stack<String>() ;
       stack.push("horse") ;
       stack.push("cat") ;
       stack.push("dog") ;
       stack.push("cow") ;
       stack.push("mouse") ;
       System.out.println(stack.pop()) ;
       System.out.println(stack.pop()) ;
       System.out.println(stack.pop()) ;
       System.out.println(stack.peek()) ;
       System.out.println("stack is empty? " + stack.isEmpty()) ;
       System.out.println(stack.pop()) ;
       System.out.println("stack is empty? " + stack.isEmpty()) ;
       System.out.println(stack.pop()) ;
       System.out.println("stack is empty? " + stack.isEmpty()) ;
      //-----------Start below here.
       // 1. Create stack that holds integers
       Stack<Integer> intStack = new Stack<Integer>() ;
       //2. push in the integers from 1 to 100 that are divisible by 3
       for (int i = 0; i < 100; i++)
           intStack.push(i+1) ;
       //3. print the size
       System.out.println("Size of int stack : "+intStack.size());
       //4. while stack not empty
       //5. let value hold pop
       //6. if value divisible by 9 then print it
       System.out.println("Divisible by 9");
       while(!intStack.isEmpty())
       {
           //Pop element from the intStack
           //store the element in num
           int num=intStack.pop();
           //check if num is divisible by 9
           if(num%9==0)
               System.out.println(num);
       }
       //-----------------End here. Please do not remove this comment.
   }
}//end of the class StackApiTester

Sample Output:

mouse
cow
dog
cat
stack is empty? false
cat
stack is empty? false
horse
stack is empty? true
Size of int stack : 100
Divisible by 9
99
90
81
72
63
54
45
36
27
18
9

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