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POCreating a method that searches an Array for a user inputted value, outputs result(s) if any?
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  1. POCreating a method that searches an Array for a user inputted value, outputs result(s) if any?
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    copied!<p>I have a program that stores 4 array lists: songName, songArtist, songAlbum &amp; songYear which can be all added to,edited,shuffled and delete by the user. I want to create a method, that when called asks the user to input a string, which then searches the array and prints any corresponding results. For example if I searched the songName array for any song with "The" in the title, they'd output one on each line.</p> <p>Can anybody help me out with this one? Thanks in advance :)</p> <p>My Code:</p> <p>Main Class:</p> <pre><code>package ca1; //imports the scanner import java.util.Scanner; public class MainClass extends UserInput { public String nextInt; public static void main(String[] args) { //Links to the UserInput class to create an object that stores //user input UserInput ui = new UserInput(); //Creates new scanner object Scanner input = new Scanner(System.in); //Declares the int "opt" so it can be used in the menu int opt; //Calls Methods Class so methods can be used below Methods methodsFunctions = new Methods(); //initial prompt only displayed when program is first ran System.out.println("Welcome to your music library"); //Usig a do while loop so that the program keeps running until //a specific condition is met, in this case it's when 0 is selected. do { //Menu Prompts printed to the screen for the user to select from System.out.println("........ \n"); System.out.println("Press 0 to Exit\n"); System.out.println("Press 1 to Add a Song\n"); System.out.println("Press 2 to View All Songs\n"); System.out.println("Press 3 to Remove a Song\n"); System.out.println("Press 4 to Edit Song Information\n"); System.out.println("Press 5 to Shuffle Library\n"); System.out.println("Press 6 to Search (by name) \n"); System.out.println("Press 7 to Remove ALL Songs\n"); //Monitors the next Int the user types opt = input.nextInt(); //"if" statements if (opt == 0) { //This corresponds to the condition of the while loop, //The program will exit and print "Goodbye!" for the user. System.out.println("Goodbye!"); } else if (opt == 1) { //This method allows the user to add a song to the library. //With the format being Title, Artist, Year. methodsFunctions.addEntry(); } else if (opt == 2) { //This method prints the contents of the Array List to the screen methodsFunctions.viewAll(); } else if (opt == 3) { //This method allows the user to remove an indiviual song from //their music library methodsFunctions.removeOne(); } else if (opt == 4) { //This method allows the user to edit the data of a particular //and then prints the new value on screen methodsFunctions.editItem(); } else if (opt == 5) { //This method uses the Collections.shuffle method //to re-arrange the track list //song to simulate a music player's shuffle effect. methodsFunctions.shuffleSongs(); } else if (opt == 6) { methodsFunctions.searchSongs(); } else if (opt == 7) { //This method will clear all contents of the library. //It will ask the user to confirm their choice. methodsFunctions.clearAll(); } else { //If the user selects an incorrect number, the console will //tell the user to try again and the main menu will print again System.out.println("Incorrect Entry, please try again"); } } //do-while loop while (opt &gt; 0); } } </code></pre> <p>Methods Class</p> <pre><code> package ca1; import java.util.ArrayList; import java.util.Collections; import java.util.List; import java.util.Random; import java.util.Scanner; public class Methods extends UserInput { Scanner input = new Scanner (System.in); //Declare array lists List&lt;String&gt; songName = new ArrayList&lt;&gt;(); List&lt;String&gt; songArtist = new ArrayList&lt;&gt;(); List&lt;String&gt; songAlbum = new ArrayList&lt;&gt;(); List&lt;Integer&gt; songYear = new ArrayList&lt;&gt;(); UserInput ui = new UserInput(); public void clearAll(){ System.out.println("Are you sure?"); System.out.print("1: Yes \n2: No" + "\n"); System.out.print(""); int confirmDelete=input.nextInt(); if (confirmDelete == 1){ songName.clear(); songYear.clear(); System.out.println("Your music library has been cleared"); } } public void viewAll(){ System.out.println("\n"); System.out.println("Your Music Library" + "\n" + " Artist - Song - Album (Year) " + "\n"); for (int i = 0; i &lt; songName.size(); i++) { int counter=i+1; System.out.println(counter+": "+songArtist.get(i)+" - "+ songName.get(i)+ " - " + songAlbum.get(i) + " (" +songYear.get(i)+") "); } System.out.println("\n"); } public void addEntry(){ //System.out.print("Enter Name: "); String newName = ui.getString("Enter the name of the track"); songName.add(newName); String newArtist = ui.getString("Who performs this track"); songArtist.add(newArtist); String newAlbum = ui.getString("What album is this track from"); songAlbum.add(newAlbum); System.out.print("What year was the track released? "); int newYear=input.nextInt(); songYear.add(newYear); System.out.println("\n" + "Thank you, " +songName.get(songName.size()-1) + " has been added to the library."); System.out.println("\n" + "Press 2 to view your library." + "\n"); /* System.out.println("\n"+songName.get(songName.size()-1)); System.out.println("\n"+songArtist.get(songArtist.size()-1)); System.out.println("\n"+songYear.get(songYear.size()-1)); */ } public void removeOne(){ System.out.println(" Which song would you like to delete? (1 to "+songName.size()+")"); viewAll(); int remove=input.nextInt(); if (remove &gt;songName.size()){ System.out.println("Invalid "); } else { remove--; System.out.println("Are you sure you would like to delete "+songArtist.get(remove)+" - "+songName.get(remove)+ "-" + songAlbum.get(remove) +" (" +songYear.get(remove)+ ") from your music library?"); System.out.print("1: Yes \n2: No" + "\n"); int confirmDelete=input.nextInt(); if (confirmDelete == 1){ songArtist.remove(remove); songAlbum.remove(remove); songName.remove(remove); songYear.remove(remove); System.out.println(songName.get(remove)+ " has just been removed from your music library"); // viewAll(); } } } public void shuffleSongs(){ //The attributes of the song all get shuffled together because they //are all linked by the same seed. long seed = System.nanoTime(); Collections.shuffle(songName, new Random(seed)); Collections.shuffle(songArtist, new Random(seed)); Collections.shuffle(songAlbum, new Random(seed)); Collections.shuffle(songYear, new Random(seed)); System.out.println("Your library is now shuffled" + "\n"); viewAll(); //Shuffles library, then outputs the new library list. } public void editItem(){ viewAll(); System.out.println("Choose the song you want to edit (1 to "+songName.size()+")"); //prints out the contents of library with first entry being index 1 //The library is numbered and goes as far as the index of the last entry int edit=input.nextInt(); if (edit &gt;songName.size()){ System.out.println("Invalid Selection"); //if user selects a number that corresponds to an index that's not //In the array list, they will be shown an error. } else{ edit--; System.out.println("\n" + "Enter New Track Name: "); input.nextLine(); String editName=input.nextLine(); songName.set(edit,editName); //Edits the songName value of the Song object selected System.out.println("\n" + "Enter New Artist "); String editArtist=input.nextLine(); songArtist.set(edit,editArtist); //Edits the songArtist value of the Song object selected System.out.println("\n" + "Enter New Album "); String editAlbum=input.nextLine(); songArtist.set(edit,editAlbum); //Edits the songAlbum value of the Song object selected System.out.println("\n" + "Enter New Year:"); int editYear; editYear = input.nextInt(); songYear.set(edit,editYear); //Edits the songName value of the Song object selected System.out.print("\n" + "Your changes have been saved:" + "\n"); System.out.print("\n" + "This is your current library"); viewAll(); } } public void searchSongs(){ } } </code></pre> <p>Everything works, I just want to add the functionality of being able to search. </p>
 

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