Hack 1
import java.util.ArrayList;
public class ArrayListExample {
private ArrayList<Integer> integerList = new ArrayList<>();
public void addIntegerToList(int number) {
integerList.add(number);
}
public int getIntegerAtIndex(int index) {
if (index >= 0 && index < integerList.size()) {
return integerList.get(index);
} else {
throw new IndexOutOfBoundsException("Index is out of bounds.");
}
}
public static void main(String[] args) {
ArrayListExample example = new ArrayListExample();
example.addIntegerToList(10);
example.addIntegerToList(20);
example.addIntegerToList(30);
int retrievedNumber = example.getIntegerAtIndex(1);
System.out.println("Number at index 1: " + retrievedNumber);
}
}
ArrayListExample.main(null);
Number at index 1: 20
Hack 2
import java.util.Random;
import java.util.Scanner;
public class NumberGuessingGame {
private static Random random = new Random();
private double base;
private int exponent;
public NumberGuessingGame() {
base = random.nextDouble() * 8 + 2;
exponent = random.nextInt(5) + 1;
}
public void play() {
System.out.println("Welcome to the Number Guessing Game!");
System.out.println("You need to guess the root and exponent of a number.");
System.out.println("Here's a hint: The number is a root of " + base + " raised to the power of " + exponent + ".");
Scanner scanner = new Scanner(System.in);
System.out.print("Enter your guess for the root: ");
double guessedRoot = scanner.nextDouble();
System.out.print("Enter your guess for the exponent: ");
int guessedExponent = scanner.nextInt();
if (guessedRoot == Math.pow(base, 1.0 / exponent) && guessedExponent == exponent) {
System.out.println("Congratulations! You guessed correctly!");
} else {
System.out.println("Sorry, your guess is incorrect.");
System.out.println("The correct answer is: " + Math.pow(base, 1.0 / exponent) + " raised to the power of " + exponent);
}
}
public static void main(String[] args) {
NumberGuessingGame game = new NumberGuessingGame();
game.play();
}
}
NumberGuessingGame.main(null);
Welcome to the Number Guessing Game!
You need to guess the root and exponent of a number.
Here's a hint: The number is a root of 2.282116664503402 raised to the power of 3.
Enter your guess for the root: Enter your guess for the exponent: Sorry, your guess is incorrect.
The correct answer is: 1.316576040632286 raised to the power of 3
Hack 3
public class MyClass {
private int intValue;
private boolean booleanValue;
private String stringValue;
private double doubleValue;
public MyClass(int intValue, boolean booleanValue, String stringValue, double doubleValue) {
this.intValue = intValue;
this.booleanValue = booleanValue;
this.stringValue = stringValue;
this.doubleValue = doubleValue;
}
public int getIntValue() {
return intValue;
}
public boolean isBooleanValue() {
return booleanValue;
}
public String getStringValue() {
return stringValue;
}
public double getDoubleValue() {
return doubleValue;
}
public static void main(String[] args) {
MyClass myObject = new MyClass(42, true, "Hello, World!", 3.14);
System.out.println("Int Value: " + myObject.getIntValue());
System.out.println("Boolean Value: " + myObject.isBooleanValue());
System.out.println("String Value: " + myObject.getStringValue());
System.out.println("Double Value: " + myObject.getDoubleValue());
}
}
MyClass.main(null);
Int Value: 42
Boolean Value: true
String Value: Hello, World!
Double Value: 3.14
Hack 4
public class PersonNameParser {
private String fullName;
public PersonNameParser(String fullName) {
this.fullName = fullName;
}
public String getFirstName() {
int spaceIndex = fullName.indexOf(' ');
if (spaceIndex != -1) {
return fullName.substring(0, spaceIndex);
} else {
return fullName;
}
}
public String getLastName() {
int spaceIndex = fullName.indexOf(' ');
if (spaceIndex != -1 && spaceIndex < fullName.length() - 1) {
return fullName.substring(spaceIndex + 1);
} else {
return "";
}
}
public static void main(String[] args) {
PersonNameParser person = new PersonNameParser("John Mortensen");
System.out.println("First Name: " + person.getFirstName());
System.out.println("Last Name: " + person.getLastName());
}
}
PersonNameParser.main(null);
First Name: John
Last Name: Mortensen