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Assoli18 [71]
2 years ago
6

Write a program using LinkedList class and ListIterator interface to demonstrate the following activities:

Computers and Technology
1 answer:
babunello [35]2 years ago
3 0

The program is an illustration of LinkedList.

<h3>What is a LinkedList?</h3>

A LinkedList is a data structure element that contains nodes where each node represents a value and also points to the next node.

<h3>The main program</h3>

The program written in Java, where comments are used to explain each line of the program is as follows:

import java.util.LinkedList;

import java.util.Iterator;

class Main {

 public static void main(String[] args) {

     //This creates the Alphabets LinkedList

   LinkedList<String> Alphabets = new LinkedList<String>();

   //This creates an iterator for the Alphabets LinkedList

   Iterator it = Alphabets.iterator();

   //This adds P, Q, R and T to the list

   Alphabets.add("P");    Alphabets.add("Q");    Alphabets.add("R");    Alphabets.add("T");

   //This prints the Alphabets LinkedList

   System.out.println(Alphabets);

   //This adds O to the beginning of the list

   Alphabets.addFirst("O");

   //This prints the Alphabets LinkedList

   System.out.println(Alphabets);

   //This adds U to the list

   Alphabets.add("U");

   //This prints the Alphabets LinkedList

   System.out.println(Alphabets);

   //This adds S after R

   Alphabets.add(4,"S");

   //This prints the Alphabets LinkedList

   System.out.println(Alphabets);

   //This removes O and Q from the list

   Alphabets.remove("O"); Alphabets.add("Q");

   //This prints the Alphabets LinkedList

   System.out.println(Alphabets);

 }

}

Read more about LinkedList at:

brainly.com/question/19754898

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Write a program, NumberStatistics.java, that reads an unspecified number of integers. The program ends with the input 0. The pro
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Answer:

Following are the program, which can be below:

import java.util.*; //defining header file

public class NumberStatistics  //defining class NumberStatistics

{

public static void main(String[] arc) //defining main method

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int total_number=0,max_val=0,min_val=0,neg_val=0,pos_val=0,neg_count=0,pos_count=0,x; //defining variables

Scanner ox= new Scanner(System.in); //creating Scanner class Object

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x= ox.nextInt(); //input value from user

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if(total_number == 1)  //defining conditional statement to check minimum and maximum value

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min_val = x;//assign value in min

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if(max_val < x) //check maximum value

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max_val = x; //assign maximum value

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if(min_val > x) //check minimum value

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min_val = x; //assign minimum value

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if(x > 0) //input values  

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pos_count++; //count positive value

pos_val+=x; // add positive values

}

else  

{

neg_count++;//count negative value

neg_val+=x; // add negative values

}

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}

// defining conditionl statement

if(total_number != 0)  // defining if block to print all value

{

System.out.println("positive value average= "+(pos_val/(double)pos_count));

System.out.println("negative values Average= "+(neg_val/(double)neg_count));

System.out.println("all values average= "+(pos_val+neg_val)/(double)total_number);

System.out.println("maximum value = "+max_val+"\n"+" minimum value = "+min_val);

}

else  

{

System.out.println("no positive values found");

System.out.println("no negative values found");

}

}

}

Output:

Enter positive and negative value with sign and when complete inter 0:

12

8

04

22

-22

-5

9

0

positive value average= 11.0

negative values Average= -13.5

all values average= 4.0

maximum value = 22

minimum value = -22

Explanation:

The Description of the above java program can be described as follows:

  • In the above code first we import the package for user input, then defines the variable "total_number,max_val,min_val,neg_val,pos_val,neg_count, pos_count,x" to store the value prints its value.
  • In the next step, a scanner class object is created for user input and defines a while loop, that checks input value isn't equal to 0, inside the loop a conditional statement defines that cont and calculates all positive, negative, and all values addition.
  • At the another conditional statement is defines, that prints all value average, and also prints maximum, minimum value.
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