Question

Hello, this is java code. I'm practicing my Java and add comments if possible for explanation.

Question 1:

Create an java program that has a class called Square. Create a function called squareParameter that calculates the parameter of the sides of the square. Write test methods in main() to test for different output.

Question 2:

Create a class called CarYearMade that contains a function called yearMade. This function receives an arraylist of different years. The function should return another arraylist that have the years from the original arraylist passed to it that show years only after the last number 1990. For example:

original arraylist yearMade([1985, 1987, 1990, 1994, 1990, 1999, 1998]) it should return [1999, 1998] only because there are two numbers 1990 but only after the last 1990 number, the values are 1999, 1998.

The constructor is an empty CarYearMade() and the yearMade function is public yearMade(CarYearMade list). It should return the list of integers only with the values from the original arraylist that are after the last number 1990. If passed arraylist is empty, return an empty arraylist. Create test values in main() in order to test.

Answer 1

//i am assuming that you are asking for Perimeter

/* package codechef; // don't place package name! */

import java.util.*;

import java.lang.*;

import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */

class Square

{

//side of square

double side;

  

// this would be invoked while object

// of that class created.Constructore

Square(double side)

{

//set the value of side

this.side=side;

}

// calculates the parameter of the sides of the square

public double squareParameter()

{

return 4*side;

}

public static void main (String[] args) throws java.lang.Exception

{

// your code goes here

Square square =new Square(4.5);//Square of side 4.5

//calculates the Perimeter

double Perimeter =square.squareParameter();

//print the Perimeter

System.out.println(Perimeter);

Square square1 =new Square(452.5);//Square of side 452.5

//calculates the Perimeter

double Perimeter1 =square1.squareParameter();

//print the Perimeter

System.out.println(Perimeter1);

}

}

Google Chrome En (Mp4) Thu Feb 15 1:09 AM* M Inbox-2014csb103 x M Chegg-Explore nev x C Hello, This Is Java C xCode, Compile & Ru x CSecure https://www.codechef.com/ide : Apps G Google inbox-2014csb 쁘뜨 IMDb Top 250-1! EROSNOW-Wal D wolfram Mathv. aG Dynamic Progra ) Challenges Ha » -other bookmarks ㅇ 20 21 //set the value of side this.side-side; 23 24 25- 26 27 /I calculates the paraneter of the sides of the square public double squareParameter() return 4 side 28 public static void main (Sti args) throws java.lang.Exception 29- 30 31 32 /I your code goes here Square square -new Square(4.5)//Square of side 4.5 //calculates the Perimeter double Perineter -square.squareParaneter) //print the Perimeter System.out.println(Perineter); 34 35 36 37 38 39 40 41 42 43 Square squarel -new Square (452.5)://Square of side 452.5 //calculates the Perimeter double Perineterl -squarel.squareParameter); //print the Perimeter System.out.println(Perineterl): 40:31 Open File Custom Input Run Status Successfully executed Date 2018-02-14 19:38:59 Time 0.09 sec Mem 2635.776 kB Output 18.0 1816.e

/* package codechef; // don't place package name! */

import java.util.*;

import java.lang.*;

import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */

class CarYearMade

{

// this would be invoked while object

// of that class created.Constructore

CarYearMade()

{

}

// return arraylist that have the years from the

//original arraylist passed to it that show years only after the last number 1990.

public ArrayList<Integer> yearMade(ArrayList<Integer> carYearMadeList)

{

ArrayList<Integer> ans=new ArrayList<Integer>();//Creating arraylist

//make Iterator for arraylist

Iterator itr=carYearMadeList.iterator();  

int pos=-1,i=0;

//iterate all value of arraylist and find last 1990 occurence position

while(itr.hasNext()){  

int year=(Integer)itr.next();

//increment the count

i++;

//if yer is 1990 then update position

if(year==1990)

{

pos=i;

}

}

i=0;

//make Iterator for arraylist

itr=carYearMadeList.iterator();

//add years only after the last number 1990

while(itr.hasNext()){  

int year=(Integer)itr.next();

i++;

//if is valid ans then add into ans

if(year>1990 && i>pos)

{

ans.add(year);

}

}

//return required ans

return ans;

}

public static void main (String[] args) throws java.lang.Exception

{

// your code goes here

CarYearMade carYearMade =new CarYearMade();//make a object

ArrayList<Integer> carYearMadeList=new ArrayList<Integer>();//Creating input arraylist

//add year into ArrayList carYearMadeList

carYearMadeList.add(1985);

carYearMadeList.add(1987);

carYearMadeList.add(1990);

carYearMadeList.add(1994);

carYearMadeList.add(1990);

carYearMadeList.add(1999);

carYearMadeList.add(1998);

ArrayList<Integer> ans=new ArrayList<Integer>();//Creating answer arraylist

ans=carYearMade.yearMade(carYearMadeList);

//make Iterator for arraylist

Iterator itr=ans.iterator();

//iterate all value of arraylist

while(itr.hasNext()){

System.out.println(itr.next());  

}

}

}

Google Chrome En 4)) Thu Feb 15 1:29 AM* M Inbox-2014csb103 x M Chegg-Explore nev x C Hello, This is Java c x Code, Compile & Ru x ← > C Secure https://www.codechef.com/ide : Apps .S. G Google Inbox-2014csb IMDb Top 250-1「 EROSNOW-Wa : wolfram Mathv aG Dynamic Progra p Challenges! Hac Other bookmarks » CarYearMade carYearMade -new CarYearMade)//make a object 56 57 58 60 61 62 63 64 65 ArrayList<Integers carYearMadelist-new ArrayList<Integer>)//Creating input arraylist //add year into ArrayList carYearMadeList carYearMadeList.add (1985) carYearMadeList.add (1987) carYearMadeList.add (1990) carYearMadeList.add (1994); carYearMadeList.add (1990) carYearMadeList.add (1999); carYearMadeList.add (1998); ArrayList<Integer ans-new Arraylist<Integer>://Creating answer arraylist ans-carYearMade.yearMade(carYearMadeList); 68 69 70 71 72 73- 74 75 76 //make Iterator for arraylist Iterator itr-ans.iterator() //iterate all value of arraylist while(itr.hasNext)) System.out.println(itr.next)) 78 79 70:25 Open File Custom Input Run Status Successfully executed Date 2018-02-14 19:59:07 Time 0.09 sec Mem 2635.776 kB Output 1999 1998