APCS Written Test Practice Barron's 2

APCS-Test-Practice-Barron's-2.java

// 1a
public String extractCity(String cityZip) {
	return CityZip.substring(0, cityZip.indexOf(','));
}

// 1b
public void printNames() {
	System.out.println(lines.get(0));
	for(int i = 1; i < lines.size() - 1; i++) {
	  // I forgot the -1 in the header above
		if(lines.get(i).equals("")) {
			System.out.println(lines.get(i + 1);
		}
	}
}

// 1c
public String getAddress(String name) {
	String toReturn = "";
	int nameIndex = 0;
	for(nameIndex = 0; nameIndex < lines.size(); nameIndex++) {
		if(lines.get(nameIndex).equals(name)) {
			break;
		}
	}
	int index = nameIndex + 1;
	while(!lines.get(index).equals("")) {
		// This loop header is okay because the final elem in lines is always an empty string
		toReturn += lines.get(index) + "\n";
		indes++;
	}
	return toReturn;
}

// 2a
public static int countA(WordSet s) {
	int count = 0;
	for(int i = 0; i < s.size(); i++) {
		if(s.findkth(i).indexOf('A') == 0) {
			count++;
		}
	}
	return count;
}

// 2b
public static void removeA(WordSet s) {
	int count = countA(s);
	while(count != 0) {
		s.remove(s.findkth(1));
		count--;
	}
}

// 2c
public static WordSet commonElements(Wordset s1, Wordset s2) {
	WordSet temp = new WordSet();
	for(int i = 1; i <= s1.size(); i++) {
		if(s2.contains(s1.findkth(i))) {
			temp.insert(s1.findkth(i));
		}
	}
	return temp;
}

// 3a
public void updateLocation(int newRow, int newCol) {
	loc = new Location(newRow, newCol);
}

// 3b
public void sortAllRows() {
	for(Contestant[] elem : contestants) {
		sort(elem);
	}
}

// 3c
public String findWinnerName() {
	sortAllRows();
	int max = Integer.MIN_VALUE;
	String winner = "";
	for(Contestant[] elem : contestants) {
		Contestant highestInRow = elem[elem.length - 1];
		if(highestInRow.getScore() > max) {
			max = highestInRow.getScore();
			winner = highestInRow.getName();
		}
	}
	return winner;
	
	// I use a for-each instead of a for, but I think it works still
}

// 4a
public class SnowyOwl extends Owl {
	public SnowyOwl() {
		super("Snowy owl");
	}
	
	public String getFood() {
		int rand = (int)(Math.random() * 3);
		if(rand == 0) return "hare";
		else if(rand == 1) return "lemming";
		else return "small bird";
	}
}

// 4b
public void allEat() {
	for(Bird b : birdList) {
		System.out.println(b.getName + " " + b.getFood);
	}
}

// NOTES:
// Is knowledge of instanceOf required? Will we have to write any .compareTo methods on the test?