Call
int[] a1 = {7};
arrayMystery(a1);
int[] a2 = {4, 3, 6};
arrayMystery(a2);
int[] a3 = {7, 4, 8, 6, 2};
arrayMystery(a3);
int[] a4 = {10, 2, 5, 10};
arrayMystery(a4);
int[] a5 = {2, 4, -1, 6, -2, 8};
arrayMystery(a5); | Final Contents of Array
{7}
{4, 2, -2}
{7, 4, -2, -5, -3}
{10, 9, 6, -1}
{2, -1, 2, -1, 5, 2} |
2.
14 14
7 9 14 2
18 18
7 9 14 18
3.
b
c 1
a 2 c 1
b
c 1
b 2 c 2
c
c 1
c 2
b
d 1 b 2 c 2
b 2 c 2
4.
public static void printStrings(Scanner input) {
while (input.hasNextInt()) {
int times = input.nextInt();
String word = input.next();
for (int i = 0; i < times; i++) {
System.out.print(word);
}
System.out.println();
}
}
5.
public static void reverseLines(Scanner input) {
while (input.hasNextLine()) {
String text = input.nextLine();
for (int i = text.length() - 1; i >= 0; i--) {
System.out.print(text.charAt(i));
}
System.out.println();
}
}
6.
public static boolean isAllEven(int[] list) {
for (int i = 0; i < list.length; i++) {
if (list[i] % 2 != 0) {
return false;
}
}
return true;
}
7.
public static boolean isUnique(int[] list) {
for (int i = 0; i < list.length; i++) {
for (int j = i + 1; j < list.length; j++) {
if (list[i] == list[j]) {
return false;
}
}
}
return true;
}
8.
import java.awt.*; // for Color
import java.util.*; // for Random
public class Ostrich extends Critter {
private Random rand;
private int steps;
private boolean west; // true if going west; false if east
private boolean hiding;
public Ostrich() {
rand = new Random();
hiding = true;
steps = 0;
west = rand.nextBoolean(); // or call nextInt(2) and map 0=false, 1=true
}
public Color getColor() {
if (hiding) {
return Color.CYAN;
} else {
return Color.WHITE;
}
}
public Direction getMove() {
if (steps == 10) {
steps = 0; // Pick a new direction and re-set the steps counter
hiding = !hiding;
west = rand.nextBoolean();
}
steps++;
if (hiding) {
return Direction.CENTER;
} else if (west) {
return Direction.WEST;
} else {
return Direction.EAST;
}
}
}
9. Two solutions are shown.
public int compareTo(Date other) {
if (month < other.month || (month == other.month && day < other.day)) {
return -1;
} else if (month == other.month && day == other.day) {
return 0;
} else {
return 1;
}
}
public int compareTo(Date other) {
if (month == other.month) {
return day - other.day;
} else {
return month - other.month;
}
}
