APCS Written Test Practice Barron's 3

APCS-Test-Practice-Barron's-3.java

// 1a
public boolean isAisleSeat(int row, int seatNumber) {
	return seatNumber == 0 || seatNumber == SEATS_PER_ROW - 1;
}

// 1b
public boolean twoTogether() {
	for(int i = 0; i < NUM_ROWS; i++) {
		for(int j = 0; j < SEATS_PER_ROW - 1; j++) {
			if(seats[i][j] == 0 && seats[i][j + 1] == 0) {
				seats[i][j] = 1;
				seats[i][j + 1] = 1;
				return true;
			}
		}
	}
	return false;
}

// 1c
public int findAdjacent(int row, int seatsNeeded) {
	for(int i = 0; i <= SEATS_PER_ROW - seatsNeeded; i++) {
		boolean success = true;
		for(int j = 0; j < seatsNeeded; j++) {
			if(seats[row][i + j] == 1)
				success = false;
		}
		if(success)
			return i;
	}
	return -1;
	
	// Very different from what the key has, needs a check
}

// 2a
public String replaceAll(String line, String sub, String repl) {
	String toReturn = "";
	int lastIndexOf = 0 - sub.length(), indexOf = line.indexOf(sub);
	while(indexOf != -1) {
		toReturn += line.substring(lastIndexOf + sub.length(), indexOf);
		toReturn += repl;
		lastIndexOf = indexOf;
		indexOf = line.indexOf(sub, indexOf + 1);
	}
	toReturn += line.substring(lastIndexOf + sub.length());
	return toReturn;
	
	// Very different from what the key has, needs a check
	// Also, why is this entire method not static?
}

// 2b
public void createPersonalizedLetters() {
	for(int i = 0; i < customers.size(); i++) {
		List<String> temp = makeCopy();
		for(int j = 0; j < temp.size(); j++) {
			temp.set(j, replaceAll(temp.get(j), "@", customers.get(i).getName()));
			temp.set(j, replaceAll(temp.get(j), "&", customers.get(i).getCity()));
			temp.set(j, replaceAll(temp.get(j), "$", customers.get(i).getState()));
		}
		writeLetter(temp);
	}
}

// 3
public class Outfit implements ClothingItem {
	// I forgot the implements until I was typing it
	private Shoes shoes;
	private Pants pants;
	private Top top;
	
	public Outfit(Shoes s, Pants p, Top t) {
		shoes = s;
		pants = p;
		top = t;
	}
	
	public String getDescription() {
		return shoes.getDescription() + "/" + pants.getDescription() + "/" + top.getDescription() + " outfit";
	}
	
	public double getPrice() {
		double s = shoes.getPrice();
		double p = pants.getPrice();
		double t = top.getPrice();
		if(s + p >= 100 || p + t >= 100 || t + s >= 100)
			return 0.75 * (s + p + t);
		else
			return 0.90 * (s + p + t);
	}
}

// 4a
public void shuffle() {
	for(int k = tiles.size() - 1; k > 0; k--) {
		// I accidentally had k++ until I was typing it
		int rand = (int)(Math.random * (k + 1));
		Tile temp = tiles.get(k);
		tiles.set(k, tiles.get(rand));
		tiles.set(rand, temp);
	}
	unusedSize = tiles.size();
}

// 4b
public void replaceTiles(TileSet t) {
	while(playerTiles.size() < NUM_LETTERS && !t.allUsed()) {
		playerTiles.add(t.getNewTile());
	}
}

// 4c
public int getWordScore(int[] indexes) {
	if(indexes[0] == -1)
		// This is okay because the precondition states that indexes is sorted in ascending order,
		// and no other negative values can be in indexes.
		return 0;
	int sum = 0;
	for(int i = 0; i < indexes.length; i++) {
		sum += playerTiles.get(indexes[i]).getValue();
	}
	if(indexes.length == NUM_LETTERS)
		sum += 20;
	return sum;
}

// NOTES:
// final is the keyword for constants. Variables denoted final should be named in ALL_CAPS