Java methods

Create a Java function called mystery that takes two Strings and returns a String.

• public String mystery(String str1, String str2) { // function body }
• public String mystery(String str) { // function body }
• public String mystery(int num1, int num2) { // function body }
• public void mystery(String str1, String str2) { // function body }

Write a Java method named calculateSum that takes two integers and returns their sum as an integer.

• public int calculateSum(int num1, int num2) { // method body }

• public void calculateSum(int num1, int num2) { // method body }

• public int calculateSum(double num1, double num2) { // method body }

• public double calculateSum(int num1, int num2) { // method body }

Define a Java method called isEven that takes an integer and returns a boolean indicating whether the number is even.

• public boolean isEven(int number) { // method body }

• public int isEven(int number) { // method body }

• public void isEven(int number) { // method body }

• public boolean isEven(double number) { // method body }

Implement a Java function named concatenateStrings that takes two strings and returns their concatenation.

• public String concatenateStrings(String str1, String str2) { // function body }

• public void concatenateStrings(String str1, String str2) { // function body }

• public String concatenateStrings(String str) { // function body }

• public int concatenateStrings(String str1, String str2) { // function body }

Develop a Java method named findMaximum that takes two integers and returns the larger of the two.

• public int findMaximum(int num1, int num2) { // method body }

• public void findMaximum(int num1, int num2) { // method body }

• public double findMaximum(double num1, double num2) { // method body }

• public int findMaximum(int num) { // method body }

Write a Java function called reverseString that takes a string as input and returns the string in reverse order.

• public String reverseString(String str) { // function body }

• public void reverseString(String str) { // function body }

• public String reverseString() { // function body }

• public int reverseString(String str) { // function body }

Construct a Java method named isPrime that takes an integer and returns a boolean indicating whether the number is a prime number.

• public boolean isPrime(int number) { // method body }

• public int isPrime(int number) { // method body }

• public void isPrime(int number) { // method body }

• public boolean isPrime(double number) { // method body }

Create a Java function that takes two arrays of doubles and returns true if one is longer than another

• public boolean isOneArrayLonger(double[] arr1, double[] arr2) { return arr1.length == arr2.length; }
• public boolean isOneArrayLonger(double[] arr1, double[] arr2) { return arr1.length > arr2.length || arr2.length > arr1.length; }
• public boolean isOneArrayLonger(double[] arr1, double[] arr2) { return arr1.length < arr2.length || arr2.length < arr1.length; }
• public boolean isOneArrayLonger(double[] arr1, double[] arr2) { return arr1.length != arr2.length; }

Create a Java function that takes rows and columns as integers and returns a 2D array

• public int[][] create2DArray(int rows, int columns) { return new int[columns][rows]; }
• public int[][] create2DArray(int rows, int columns) { return new int[columns][rows]; }
• public int[][] create2DArray(int rows, int columns) { return new int[rows][rows]; }
• public int[][] create2DArray(int rows, int columns) { return new int[rows][columns]; }

Design a Java method named calculateDifference that takes two integers and returns their difference as an integer.

• public int calculateDifference(int num1, int num2) { // method body }

• public void calculateDifference(int num1, int num2) { // method body }

• public int calculateDifference(double num1, double num2) { // method body }

• public double calculateDifference(int num1, int num2) { // method body }