Foundations Lab, COT3002L, Fall 01 s1

CSC142, Computer Science II, Project 5

Due via D2L. Late programs are not acceptable.

1. For each program (5 points each, total 25) below, show what is displayed on the screen when the code executes. import java.util.Arrays; public class HelloWorld { public static void main(String [] args) { int [] arr = {3, 7, 5}; String arrStr = Arrays.toString(arr); System.out.println(arrStr);

int max = Math.max(3, -5); System.out.println(max);

String s = HelloWorld.getHello(); System.out.println(s); }

public static String getHello() { return "Hello, world!"; } }

public class HelloInline { // The order of method declarations does not matter!! public static String getHello() { return "Hello, world!"; }

// Program execution always begins with the first line of main(). public static void main(String [] args) { System.out.println(HelloInline.getHello()); System.out.println(getHello()); // Each time the command name is executed, the method is called. // We can call the method as many times as we like. System.out.println(getHello()); System.out.println(getHello()); } } public class SimpleMath { public static int max(int a, int b, int c) { int temp = Math.max(a, b); return Math.max(temp, c); }

public static double average(int a, int b, int c) { double sum = a + b + c; return sum / 3.0; }

public static void main(String [] args) { int x = 7; int y = 9; int z = 4;

System.out.println(max(x,y,z)); System.out.println(average(x,y,z)); } } public class NamingAndScope { public static void main(String [] args) { int x = 3; x = x(); System.out.println(x); x = x(x+1); System.out.println(x); for(int i=0; i<2; i++) { x = x(x+3); System.out.println(x); } }

public static int x() { int x = 5; return x + 7; }

public static int x(int x) { return x + 1; } } public class WhatsPrinted01 { public static void func(int A[]) { for (int i=1; i

int x = func(A, B); System.out.println(x + " " + A[1]); } }

import java.util.Arrays; public class MysteryClass1 { public static void main(String [] args) { Point[] p = {new Point(2,4), new Point(3,5), new Point(9,11)}; mystery1(p); System.out.println(Arrays.toString(p));

p = mystery2(p); System.out.println(Arrays.toString(p)); } public static void mystery1(Point [] ps) { for(int i=0; i

public class Point { public double x; // the point’s x-coordinate public double y; // the point’s y-coordinate

public Point(double x, double y) // constructor of point { … } public double distance (Point p) // how far away this point is from point p { … } public void setLocation (double x, double y) // sets the point’s x and y to the given values { … } public void translate (double dx, double dy) // adjusts the point’s x and y by the given amounts { … } }

2. Develop the following programs. 1. (15 points) Programming challenge 10 in book, on page 493, develop ArrayOperation.java to support the ArrayOperations.java (http://www.cs.wcupa.edu/~zjiang/ArrayOperations.java)

2. (15 points) Programming challenge 3 in book, on page 491, develop Account.java to support the AccountApplication.java (http://www.cs.wcupa.edu/~zjiang/AccountApplication.java)

3. (15 points) Programming challenge 2 in book, on page 490, develop Payroll.java to support the PayrollApplication.java (http:// http://www.cs.wcupa.edu/~zjiang/PayrollApplication.java)

4. (15 points) Programming challenge 5 in book, on page 491, develop DriversExam.java to support the DL.java (http://www.cs.wcupa.edu/~zjiang/DL.java) . 5. (20 points) Programming challenge 7 in book, on page 492, develop GradeBook.java to support the Grade.java (http://www.cs.wcupa.edu/~zjiang/Grade.java)