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/* * Part 2: Strand * A class which represents a strand of lights. * For this assignment, you will be writing a class called Strand that represents a strand of lights. * The lights in Strand are instances of the Light class that you created in Part 1 Light. *** Make sure you append your last name to Light to reflect what you created for your Light class *** * The Strand class needs the Light class in the same file folder to work properly. * As in Part 1 of this assignment, your job is to add code to Strand.java so that your implementation meets the requirements specified below. * To complete the assignment, replace all the /* missing code / comments in the file with your own code. * You will need to customize Light instantiations to reflect LightLastname and StrandLastname. * Please hand in Light ***AND*** Strand together so that I can test your creation. Variables ArrayList strand - An ArrayList that stores a strand of lights based on the Light class. ArrayList <LightLastName> creates the Light type to be store in each ArrayList element. Methods Strand() - Default constructor that sets strand to an ArrayList holding one turned on white bulb, that is not burnt out. Strand(int n) - A constructor that sets strand to an ArrayList of size n, holding n white bulbs, that are all turned on and not burnt out. If n <= 0, then the strand should be set to size one, with a white bulb, on and not burnt out. String toString() - This method returns a String representation of the Light objects in the ArrayList , one per line. For example: on green not burnt out off red not burnt out off green burnt out on blue not burnt out on red not burnt out void setColor(String c) - This method sets the color of all the light bulbs in the entire Strand. The color variable is set to c only if c is "red", "green" or "blue". It should ignore the case of the value in c. If c holds any value other than "red", "green" or "blue", color will be set to "white". void setMulti() - This method sets the light bulbs to the pattern "red", "green", "blue", "red", "green", "blue",... until the end of the strand. void turnOn() - This method turns on all the lights in the strand. Each individual bulb can only be turned on if it's burntOut variable is false. void turnOff() - This method turns off all the lights in the strand. void burnOut(int i) - This method sets the Light at location i's burntOut variable to true. Sample Run: 1. Test the default constructor Strand() *** PASS: Strand() creates a list of size 1 2. Test the constructor Strand(n) *** PASS: Strand(0) creates a list of size 1 *** PASS: Strand(-7) creates a list of size 1 *** PASS: Strand(5) creates a list of size 5 *** PASS: Strand(5) initialized bulbs correctly 3. Test setColor(String) *** PASS: setColor worked as expected (green test) *** PASS: setColor worked as expected (pink test) 4. Test turnOff() *** PASS: turnOff() worked as expected 5. Test turnOn() *** PASS: turnOn() worked as expected 6. Test burnOut(n) *** PASS: burnOut(1) works as expected. */ import java.util.ArrayList; public class Strand { // An ArrayList that stores a strand of lights based on the Light class, i.e. Light type private ArrayList<Light> strand = new ArrayList<Light>(); // Default constructor that sets strand to an ArrayList holding one // turned on white bulb, that is not burnt out. /* missing code */ // A constructor that sets strand to an ArrayList of size n, holding // n white bulbs, that are all turned on and not burnt out. If n <= 0, // then the strand should be set to size one, with a white bulb, on // and not burnt out. /* missing code */ // This method returns a String representation of the // Light objects in the ArrayList, one per line. For example, // here is the String returned when toString is called on a // Strand with 5 lights: // // on green not burnt out // off red not burnt out // off green burnt out // on blue not burnt out // on red not burnt out // // Note: there is one space between "off"/"on" and the value for // color, and a tab before the "burnt out" or "not burnt out". /* missing code */ // This method sets the color of all the light bulbs in the entire Strand. /* missing code */ // This method sets the light bulbs to the pattern "red", "green", "blue", // "red", "green", "blue",... until the end of the strand. /* missing code */ // This method turns on all the lights in the strand. Each individual bulb // can only be turned on if it's burntOut variable is false. /* missing code */ // This method turns off all the lights in the strand. /* missing code */ // This method sets the Light at location i's burntOut variable to true. /* missing code */ //**************** DO NOT EDIT BELOW HERE EXCEPT TO CHANGE Strand TO REFLECT CLASS/FILE NAME **************** public static void main(String[] args) { // ************************************************************************* // 1. Test Strand() // ************************************************************************* System.out.println("1. Test the default constructor Strand()"); Strand strand1 = new Strand(); if (strand1.strand.size() == 1) System.out.println("*** PASS: Strand() creates a list of size 1"); else System.out.println("*** FAIL: Strand() creates a list of size " + strand1.strand.size() + ", when a list of size 1 is expected."); // *********************************** // 2. Test Strand(n) // *********************************** System.out.println("\n2. Test the constructor Strand(n)"); // Try to create a strand of lights with 0 bulbs Strand emptyStrand = new Strand(0); if (emptyStrand.strand.size() == 1) System.out.println("*** PASS: Strand(0) creates a list of size 1"); else System.out.println("*** FAIL: Strand(0) creates a list of size " + emptyStrand.strand.size() + ", when a list of size 1 is expected."); // Try to create a strand of lights with a negative number Strand negativeStrand = new Strand(-7); if (negativeStrand.strand.size() == 1) System.out.println("*** PASS: Strand(-7) creates a list of size 1"); else System.out.println("*** FAIL: Strand(-7) creates a list of size " + negativeStrand.strand.size() + ", when a list of size 1 is expected."); // Try to create a strand of lights with a positive number Strand strandWithFiveBulbs = new Strand(5); if (strandWithFiveBulbs.strand.size() == 5) System.out.println("*** PASS: Strand(5) creates a list of size 5"); else System.out.println("*** FAIL: Strand(5) creates a list of size " + strandWithFiveBulbs.strand.size() + ", when a list of size 5 is expected."); // Verify that all the light bulbs are initialized properly boolean success = true; for (Light bulb : strandWithFiveBulbs.strand) { if (!(bulb.isOn() && bulb.getColor().equals("white"))) { success = false; } } if (strandWithFiveBulbs.strand.size() > 0 && success) { System.out.println("*** PASS: Strand(5) initialized bulbs correctly"); } else { System.out.println("*** FAIL: Strand(5) did not initialize bulb(s) correctly"); } // *********************************** // 3. Test setColor(String) // *********************************** System.out.println("\n3. Test setColor(String)"); // All of the bulbs in our strandWithFiveBulbs are white. Set them to // green. strandWithFiveBulbs.setColor("green"); success = true; for (Light light : strandWithFiveBulbs.strand) { if (!light.getColor().equals("green")) success = false; } if (strandWithFiveBulbs.strand.size() > 0 && success) System.out.println("*** PASS: setColor worked as expected (green test)"); else System.out.println("*** FAIL: setColor did not work as expected (green test)"); // Now try to set them to a color that is not supported. This should // cause all the bulbs to be set back to white. strandWithFiveBulbs.setColor("pink"); success = true; for (Light light : strandWithFiveBulbs.strand) { if (!light.getColor().equals("white")) success = false; } if (strandWithFiveBulbs.strand.size() > 0 && success) System.out.println("*** PASS: setColor worked as expected (pink test)"); else System.out.println("*** FAIL: setColor did not work as expected (pink test)"); // *********************************** // 4. Test turnOff() // *********************************** System.out.println("\n4. Test turnOff()"); strand1.turnOff(); if (strand1.strand.size() > 0 && !strand1.strand.get(0).isOn()) { System.out.println("*** PASS: turnOff() worked as expected"); } else { System.out.println("*** FAIL: turnOff() did not work as expected"); } // *********************************** // 5. Test turnOn() // *********************************** System.out.println("\n5. Test turnOn()"); strand1.turnOn(); if (strand1.strand.size() > 0 && strand1.strand.get(0).isOn()) { System.out.println("*** PASS: turnOn() worked as expected"); } else { System.out.println("*** FAIL: turnOn() did not work as expected"); } // *********************************** // 6. Test burnOut(int) // *********************************** System.out.println("\n6. Test burnOut(n)"); strand1.burnOut(0); if (strand1.toString().equals("off white\tburnt out\n")) { System.out.println("*** PASS: burnOut(1) works as expected."); } else { System.out.println("*** FAIL: burnOut(1) does not work as expected."); } // ************************************ // 7. Test setMulti() // ************************************ System.out.println("\n7. Test setMulti(n)"); // Try to create a strand of lights with a positive number Strand sw12b = new Strand(12); //test if strand was created if (sw12b.strand.size() == 12) System.out.println("*** PASS: StrandAnswer(12) creates a list of size 12"); else System.out.println("*** FAIL: StrandAnswer(12) creates a list of size " + sw12b.strand.size() + ", when a list of size 12 is expected."); //change all bulbs colors to the multi color pattern sw12b.setMulti(); // Verify that all the light bulbs are initialized properly success = true; for (int i = 0; i < sw12b.strand.size(); i++){ if(i % 3 == 0){ if(!(sw12b.strand.get(i).isOn() && sw12b.strand.get(i).getColor().equals("red"))){ success = false; } } else if(i % 3 == 1){ if(!(sw12b.strand.get(i).isOn() && sw12b.strand.get(i).getColor().equals("green"))){ success = false; } } else{ if(!(sw12b.strand.get(i).isOn() && sw12b.strand.get(i).getColor().equals("blue"))){ success = false; } } } //print pass or fail based on logic if (sw12b.strand.size() > 0 && success){ System.out.println("*** PASS: StrandAnswer(12) initialized bulbs correctly"); } else{ System.out.println("*** FAIL: StrandAnswer(12) did not initialize bulb(s) correctly"); } } }