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    Assignment 01

    Uploaded by

    Khaled Hania
    The document contains Java code for several classes: 1) A Stock class that defines properties and methods for a stock like symbol, name, prices, and calculating price change percentage. 2) A Stockmain class that creates a Stock object and prints the price change percentage. 3) Additional classes that generate random numbers, time code execution using a StopWatch class, define an Account class with transactions, and solve linear equations.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd

    Assignment 01

    Uploaded by

    Khaled Hania
    29 views7 pages
    The document contains Java code for several classes: 1) A Stock class that defines properties and methods for a stock like symbol, name, prices, and calculating price change percentage. 2) A Stockmain class that creates a Stock object and prints the price change percentage. 3) Additional classes that generate random numbers, time code execution using a StopWatch class, define an Account class with transactions, and solve linear equations.

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    Original Title

    Assignment-01

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    The document contains Java code for several classes: 1) A Stock class that defines properties and methods for a stock like symbol, name, prices, and calculating price change percentage. 2) A Stockmain class that creates a Stock object and prints the price change percentage. 3) Additional classes that generate random numbers, time code execution using a StopWatch class, define an Account class with transactions, and solve linear equations.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    29 views7 pages

    Assignment 01

    Uploaded by

    Khaled Hania
    The document contains Java code for several classes: 1) A Stock class that defines properties and methods for a stock like symbol, name, prices, and calculating price change percentage. 2) A Stockmain class that creates a Stock object and prints the price change percentage. 3) Additional classes that generate random numbers, time code execution using a StopWatch class, define an Account class with transactions, and solve linear equations.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 7

    The name: Khaled Wael Hania Number No: 120211958

    Assignment #1
    EX 9_02
    class Stock{
    private String symbol;
    private String name;
    private double previousClosingPrice;
    private double currentPrice;

    public Stock(String symbol , String name){


    this.symbol = symbol;
    this.name = name;
    }

    public double getChangePercent() {


    return (currentPrice - previousClosingPrice) / currentPrice;
    }

    public void setPreviousClosingPrice(double previousClosingPrice) {


    this.previousClosingPrice = previousClosingPrice;
    }

    public void setCurrentPrice(double currentPrice) {


    this.currentPrice = currentPrice;
    }

    public String getName() {


    return name;
    }

    public void setName(String name) {


    this.name = name;
    }

    public String getSymbol() {


    return symbol;
    }

    public void setSymbol(String Symbol) {


    this.symbol = symbol;
    }
    }

    public class Stockmain {


    public static void main(String[] args) {
    Stock testStock = new Stock("ORCL", "Oracle Corporation");
    testStock.setPreviousClosingPrice(34.5);
    testStock.setCurrentPrice(34.35);

    System.out.println("The price change for " + testStock.getSymbol() + " " +


    testStock.getName() + " is " + Math.round(testStock.getChangePercent()
    * 10000.00) / 100.00 + "%");
    }
    }
    EX 9_04
    import java.util.Random;
    public class Ex9_04 {
    private static final int seed = 1000;
    private static final int n = 100;

    public static void main(String[] args) {


    Random random = new Random(seed);
    for (int i = 0; i < 50; i++) {
    if (i % 10 == 0) System.out.println();

    System.out.print(random.nextInt(n) + " ");


    }
    }
    }

    EX 9_06
    class StopWatch{
    private int startTime;
    private int endTime;

    public int getStartTime(){


    return startTime;
    }

    public int getEndTime(){


    return endTime;
    }

    public StopWatch (){


    startTime = (int) System.currentTimeMillis();
    }

    public void start(){


    startTime = (int) System.currentTimeMillis();
    }

    public void stop(){


    endTime = (int) System.currentTimeMillis();
    }

    public long getElapsedTime() {


    return (endTime - startTime);
    }
    }
    import java.util.Random;
    public class StopWatchMain {
    public static void main(String[] args) {
    int[] testNums = new int[100000];
    Random random = new Random();

    for (int i = 0; i < 100000; i++) {


    testNums[i] = random.nextInt(10000);
    }
    StopWatch stopWatch = new StopWatch();
    stopWatch.start();
    System.out.println("Start time: " + stopWatch.getStartTime() + " ms");

    selectionSort(testNums);
    stopWatch.stop();

    System.out.println("End time: " + stopWatch.getEndTime() + " ms");

    System.out.println("Elapsed time for selection sort: " +


    stopWatch.getElapsedTime() + " ms");
    }

    public static void selectionSort(int[] nums) {


    for (int n = 0; n < nums.length - 1; n++) {
    int min = nums[n];
    int minIdx = n;
    for (int k = n + 1; k < nums.length; k++) {
    if (nums[k] < min) {
    min = nums[k];
    minIdx = k;
    }
    }
    // Swap
    if (minIdx != n) {
    nums[minIdx] = nums[n];
    nums[n] = min;
    }
    }
    }
    }

    EX 9_07
    import java.util.*;
    public class Account {
    private int id;
    private double balance;
    private double annualInterestRate;
    private Date dateCreated;

    public Account() {
    id = 0;
    balance = 0;
    annualInterestRate = 0;
    }

    public Account(int newId, double newBalance) {

    this.id = newId;
    this.balance = newBalance;
    dateCreated = new Date();
    annualInterestRate = 0;
    }

    public int getID() {

    return id;
    }

    public void setID(int newID) {

    this.id = newID;
    }

    public double getBalance() {

    return balance;
    }

    public void setBalance(double newBalance) {

    this.balance = newBalance;
    }

    public double getAnnualInterestRate() {


    return annualInterestRate;
    }

    public void setAnnualInterestRate(double newInterestRate) {

    this.annualInterestRate = newInterestRate;
    }

    public Date getDateCreated() {

    Date startDate = dateCreated;

    return startDate;
    }

    public double getMonthlyInterestRate() {

    double InterestRatePerMonth = (annualInterestRate / 12);

    return InterestRatePerMonth;
    }

    public double getMonthlyInterest() {

    double monthlyInterest = balance * (this.getMonthlyInterestRate() / 100);

    return monthlyInterest;
    }

    public void withdraw(double amount) {

    balance -= amount;
    }
    public void deposit(double amountDeposit) {

    balance += amountDeposit;

    public String toString() {

    return "\nAccount ID: " + getID() + "\nBalance: " + getBalance() +


    "\nDate created " + getDateCreated();
    }

    public class AccountMain {

    public static void main(String[] args) {


    Account obj = new Account(1122, 20_000);
    obj.setAnnualInterestRate(4.5);
    obj.withdraw(2500);
    obj.deposit(3000);

    System.out.println("The balance in account " + obj.getID() + " is now: $" +


    obj.getBalance());
    System.out.println("The total interest, at a rate of " +
    obj.getMonthlyInterestRate() + "%"
    + " per month is " + obj.getMonthlyInterest());
    System.out.println("And your account was created on " +
    obj.getDateCreated());
    }
    }

    EX 9_11
    public class LinearEquation {
    private double a;
    private double b;
    private double c;
    private double d;
    private double e;
    private double f;

    public LinearEquation(double a, double b, double c, double d, double e, double


    f) {
    this.a = a;
    this.b = b;
    this.c = c;
    this.d = d;
    this.e = e;
    this.f = f;

    public double getA() {


    return a;
    }

    public double getB() {


    return b;
    }

    public double getC() {


    return c;
    }

    public double getD() {


    return d;
    }

    public double getE() {

    return e;
    }

    public double getF() {


    return f;
    }

    public boolean isSolvable() {

    return a * d - b * c != 0;
    }

    public double getX() {

    double x = (this.getE() * this.getD() - this.getB() * this.getF()) /


    (this.getA() * this.getD() - this.getB() * this.getC());

    return x;
    }

    public double getY() {


    double y = (this.getA() * this.getF() - this.getE() * this.getC()) /
    (this.getA() * this.getD() - this.getB() * this.getC());
    return y;
    }
    }

    import java.util.*;
    public class LinearEquationMain {
    public static void main(String[] args) {

    Scanner input = new Scanner(System.in);

    double a, b, c, d, e, f;

    System.out.println("Enter values for a, b, c, d, e, and f now:");

    a = input.nextDouble();
    b = input.nextDouble();
    c = input.nextDouble();
    d = input.nextDouble();
    e = input.nextDouble();
    f = input.nextDouble();

    LinearEquation tester = new LinearEquation(a, b, c, d, e, f);

    if (tester.isSolvable()) {

    System.out.println("x is " + tester.getX());


    System.out.println("y is " + tester.getY());
    } else {
    System.out.println("The equation has no solution");
    }
    input.close();
    }
    }

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