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Utilities.java
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import java.util.ArrayList;
import java.util.Random;
class Utilities {
//EFFECT: Sorts the given ArrayList according to the given comparator
static <T> void quicksort(ArrayList<T> arr, IComparator<T> comp) {
quicksortHelp(arr, comp, 0, arr.size());
}
//EFFECT: sorts the source array according to comp, in the range of indices [loIdx, hiIdx)
static <T> void quicksortHelp(ArrayList<T> source, IComparator<T> comp,
int loIdx, int hiIdx) {
// Step 0: check for completion
if (loIdx >= hiIdx) {
return; // There are no items to sort
}
// Step 1: select pivot
T pivot = source.get(loIdx);
// Step 2: partition items to lower or upper portions of the temp list
int pivotIdx = partition(source, comp, loIdx, hiIdx, pivot);
// Step 3: sort both halves of the list
quicksortHelp(source, comp, loIdx, pivotIdx);
quicksortHelp(source, comp, pivotIdx + 1, hiIdx);
}
//Returns the index where the pivot element ultimately ends up in the sorted source
static <T> int partition(ArrayList<T> source, IComparator<T> comp,
int loIdx, int hiIdx, T pivot) {
int curLo = loIdx;
int curHi = hiIdx - 1;
while (curLo < curHi) {
// Advance curLo until we find a too-big value (or overshoot the end of the list)
while (curLo < hiIdx && comp.compare(source.get(curLo), pivot) <= 0) {
curLo = curLo + 1;
}
// Advance curHi until we find a too-small value (or undershoot the start of the list)
while (curHi >= loIdx && comp.compare(source.get(curHi), pivot) > 0) {
curHi = curHi - 1;
}
if (curLo < curHi) {
swap(source, curLo, curHi);
}
}
swap(source, loIdx, curHi); // place the pivot in the remaining spot
return curHi;
}
// swap the places of these two vertices
static <T> void swap(ArrayList<T> source, int t1, int t2) {
T oldt1 = source.get(t1);
source.set(t1, source.get(t2));
source.set(t2, oldt1);
}
public static void initSongList() {
Review.songList = new ArrayList<Song>();
Review.songList.add(Song.Youve_Lost_That_Lovin_Feel);
Review.songList.add(Song.Goodnight_Irene);
Review.songList.add(Song.Downhearted_Blues);
Review.songList.add(Song.Crazy_Man_Crazy);
Review.songList.add(Song.Iron_Man);
Review.songList.add(Song.Like_A_Rolling_Stone);
Review.songList.add(Song.Masters_Of_War);
Review.songList.add(Song.More_Than_A_Feeling);
Review.songList.add(Song.Born_In_The_USA);
Review.songList.add(Song.Thatll_Be_The_Day);
Review.songList.add(Song.Can_The_Circle_Be_Unbroken);
Review.songList.add(Song.Blue_Suede_Shoes);
Review.songList.add(Song.Rock_And_Roll_Music);
Review.songList.add(Song.Sunshine_Of_Your_Love);
Review.songList.add(Song.Take_It_Easy);
Review.songList.add(Song.Jailhouse_Rock);
Review.songList.add(Song.Evil_Ways);
Review.songList.add(Song.Aint_That_A_Shame);
Review.songList.add(Song.Ive_Got_A_Crush_On_You);
Review.songList.add(Song.How_Do_You_Do_It);
Review.songList.add(Song.Go_Your_Own_Way);
Review.songList.add(Song.The_Message);
Review.songList.add(Song.Great_Balls_Of_Fire);
Review.songList.add(Song.Evil_Is_Going_On);
Review.songList.add(Song.I_Cant_Explain);
Review.songList.add(Song.Im_Dreaming_Of_A_White_Christmas);
Review.songList.add(Song.The_Number_Of_The_Beast);
Review.songList.add(Song.White_Rabbit);
Review.songList.add(Song.SHake_Rattle_And_Roll);
Review.songList.add(Song.Breaking_The_Law);
Review.songList.add(Song.Whole_Lotta_Love);
Review.songList.add(Song.Im_Sitting_On_Top_of_The_World);
Review.songList.add(Song.Lets_Go_Crazy);
Review.songList.add(Song.Tutti_Frutti_LR);
Review.songList.add(Song.Rock_Island_Line);
Review.songList.add(Song.Caldonia);
Review.songList.add(Song.Like_A_Virgin);
Review.songList.add(Song.Master_Of_Puppets);
Review.songList.add(Song.Billie_Jean);
Review.songList.add(Song.Straight_Edge);
Review.songList.add(Song.Money);
Review.songList.add(Song.Nights_In_White_Satin);
Review.songList.add(Song.Shout_At_The_Devil);
Review.songList.add(Song.Supremacy);
Review.songList.add(Song.My_Best_Friends_Girl);
Review.songList.add(Song.Smells_Like_Teen_Spirit);
Review.songList.add(Song.Tutti_Frutti_PB);
Review.songList.add(Song.Show_Me_The_Way);
Review.songList.add(Song.Please_Dont_Talk_About_Me_When_Im_Gone);
Review.songList.add(Song.Please_Please_Me);
Review.songList.add(Song.Dont_Believe_The_Hype);
Review.songList.add(Song.Bohemian_Rhapsody);
Review.songList.add(Song.Airbag);
Review.songList.add(Song.Bulls_On_Parade);
Review.songList.add(Song.Blitzkrieg_Bop);
Review.songList.add(Song.Crossroad_Blues);
Review.songList.add(Song.Rocket_88);
Review.songList.add(Song.Rock_Box);
Review.songList.add(Song.Schools_Out);
Review.songList.add(Song.Anarchy_In_The_UK);
Review.songList.add(Song.Smoke_On_The_Water);
Review.songList.add(Song.Black_Hole_Sun);
Review.songList.add(Song.Space_Oddity);
Review.songList.add(Song.Psycho_Killer);
Review.songList.add(Song.Good_Vibrations);
Review.songList.add(Song.Surfin_USA);
Review.songList.add(Song.A_Day_In_The_Life);
Review.songList.add(Song.Mr_Tambourine_Man);
Review.songList.add(Song.Shboom);
Review.songList.add(Song.Purple_Haze);
Review.songList.add(Song.Tom_Dooley);
Review.songList.add(Song.You_Really_Got_Me);
Review.songList.add(Song.The_One_I_Love);
Review.songList.add(Song.Monkey_Gone_To_Heaven);
Review.songList.add(Song.Dont_Stand_So_Close_To_Me);
Review.songList.add(Song.Color_Me_Impressed);
Review.songList.add(Song.I_Cant_Get_No_Satisfaction);
Review.songList.add(Song.Paint_It_Black);
Review.songList.add(Song.Will_You_Still_Love_Me_Tomorrow);
Review.songList.add(Song.Search_And_Destroy);
Review.songList.add(Song.Wont_Get_Fooled_Again);
Review.songList.add(Song.Heart_Full_of_Soul);
Review.songList.add(Song.Tomorrow_Never_Knows);
Review.songList.add(Song.Pride);
Review.songList.add(Song.Panama);
Review.songList.add(Song.Ashes_Of_American_Flags);
Review.songList.add(Song.Roundabout);
}
static void reInitID() {
for (Song s: Review.songList) {
s.id = new Random().nextInt(200);
}
}
public static ArrayList<Song> initChoices(int current) {
ArrayList<Song> choices = new ArrayList<Song>();
choices.add(Review.songList.get(current));
while (choices.size() < 4) {
Song randomSong = Review.songList.get((new Random().nextInt(86)));
if (!choices.contains(randomSong)) {
choices.add(randomSong);
}
else {
}
}
Utilities.reInitID();
Utilities.quicksort(choices, new CompareSong());
return choices;
}
public static boolean isNumeric(String key) {
return key.equals("1") || key.equals("2")
|| key.equals("3") || key.equals("4")
|| key.equals("5") || key.equals("6")
|| key.equals("7") || key.equals("8")
|| key.equals("9") || key.equals("0");
}
}