Fix code errors when running juketester.java

Juketester.java

public class JukeTester { public static void main(String[] args) {

Record testRecord;

Jukebox myJukebox = new Jukebox();

myJukebox.insert(new Record()); myJukebox.insert(new Record("Kokomo", "The Beach Boys")); myJukebox.insert(new Record("Wooly Bully", "Sam the Sham & the Pharaohs")); myJukebox.insert(new Record("Mustang Sally", "Wilson Pickett")); myJukebox.insert(1, new Record( "Great Balls of Fire", "Jerry Lee Lewis")); myJukebox.insert(0, new Record("I Feel Good", "James Brown"));

System.out.println("Jukebox now contains: " + myJukebox);

System.out.println(" A random Record is: " + myJukebox.random()); System.out.println("A random Record is: " + myJukebox.random()); System.out.println("A random Record is: " + myJukebox.random()); System.out.println("A random Record is: " + myJukebox.random()); System.out.println("A random Record is: " + myJukebox.random());

testRecord = new Record("Kokomo", "The Beach Boys"); System.out.println(" Does it contain " + testRecord + "?: " + myJukebox.contains(testRecord));

testRecord = new Record("Mustang Sally", "The Commitments"); System.out.println("Does it contain " + testRecord + "?: " + myJukebox.contains(testRecord));

testRecord = new Record("Its Too Late", "Wilson Pickett"); System.out.println("Does it contain " + testRecord + "?: " + myJukebox.contains(testRecord));

testRecord = new Record("Great Balls of Fire", "Jerry Lee Lewis"); System.out.println(" What slot is " + testRecord + " in?: " + myJukebox.findSlot(testRecord));

testRecord = new Record("The Great Pretender", "The Platters"); System.out.println("What slot is " + testRecord + " in?: " + myJukebox.findSlot(testRecord));

testRecord = new Record("Wooly Bully", "Sam the Sham & the Pharaohs"); System.out.println(" Did it successfully remove " + testRecord + "?: "+ myJukebox.remove(testRecord));

testRecord = new Record("Heartbreak Hotel", "Elvis Presley"); System.out.println("Did it successfully remove " + testRecord + "?: " +myJukebox.remove(testRecord));

System.out.println(" Jukebox now contains: " + myJukebox); } }

JukeInterface.java

public interface JukeInterface {

public void insert(Record aRecord);

public void insert(int slot, Record aRecord);

public boolean remove(Record aRecord);

public boolean contains(Record aRecord);

public int findSlot(Record aRecord); (int)(Math.random()*theSize) public Record random();

public String toString(); }

Record.java

public class Record { private String title; private String artist;

public Record( String theTitle, String theArtist ) { this.title = theTitle; this.artist = theArtist; }

public boolean equals( Object currentOb ) { if ( this.getClass() != currentOb.getClass() ) return false; if ( currentOb == null ) return false; Record aRecord2 = (Record)currentOb; // Must typecast the object

return ( this.title.equals( aRecord2.title ) && this.artist.equals( aRecord2.artist )); }

public String toString() { return "( " + this.title + ", " + this.artist + " )"; } }

JukeBox.java

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Class: Jukebox

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import java.util.ArrayList; import java.util.Random;

//Class: Jukebox implemeting the interface JukeInterface public class Jukebox implements JukeInterface { //private instance field records, which is an arraylist of Record private ArrayList records = null; //constructor public Jukebox() { //records is initialized with an empty array list records = new ArrayList(); } @Override //insert aRecord into the records array list public void insert(Record aRecord) { records.add(aRecord);//calling ArrayList's add method }

@Override //insert aRecord into the records arraylist at the given slot public void insert(int slot, Record aRecord) { records.add(slot, aRecord);//calling arraylist's add method to add element at given index. //subsequent element will be shifted one position to the right }

@Override //remove aRecord from records //return true if removal is successful, false otherwise public boolean remove(Record aRecord) { return records.remove(aRecord); }

@Override //this method will check whether aRecord exists in the records arraylist or not //return true if contains, false otherwise public boolean contains(Record aRecord) { return records.contains(aRecord); }

@Override //find index of given aRecord in the records array list and return it public int findSlot(Record aRecord) { return records.indexOf(aRecord); }

@Override //return a random Record from the array list public Record random() { Random r = new Random(); //this will give any index from 0 to records.size()-1 int randomIndex = r.nextInt(records.size()); return records.get(randomIndex);//get the record at randomIndex }

@Override //String representation of the Jukebox public String toString() { return records.toString(); } }