Question

Lab 7: Methods

1. Write a Java program called Numbers that calls the following methods and displays the returned value: o Write a method called cubeIt that accepts one integer parameter and returns the value raised to the third power as an integer.

2. Write a method called randomInRange that accepts two integer parameters representing a range. The method returns a random integer in the specified range inclusive. o Write a method called larger that accepts two double parameters and returns true if the first parameter is greater and false otherwise. Use the Boolean data type.

3. Write a Java program called Characters that calls the following methods and displays the returned value:

o Write a method called countA that accepts a String parameter and returns the number of times the character ‘A’ is found in the string.

o Write a method called multiConcat that takes a String and integer as parameters. Return a String that consists of the string parameter concatenated with itself count times, where the count is the integer parameter. For example, if the parameter values are “hi” and 3, the return value is “hihihi”.

• Display the returned values in main.

• There is no user input.

• Set up variables and change the values to test the methods.

• Submit only one .java file

Answer 1

Here are the methods for all the problems.
thanks and do give a thumbs up from your end : )

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import java.util.Random;

public class Numbers {

    /*
    Write a method called cubeIt that accepts one integer parameter
    and returns the value raised to the third power as an integer.
     */
    public static int cubeIt(int number) {

        return number * number * number;

    }

    /*
    Write a method called randomInRange that accepts two integer parameters representing a range.
    The method returns a random integer in the specified range inclusive.
     */

    public static int randomInRange(int start, int end) {

        Random random = new Random();
        return start + random.nextInt(end - start);
    }

    /*
    Write a method called larger that accepts two double parameters and returns true
    if the first parameter is greater and false otherwise. Use the Boolean data type.
     */
    public static boolean larger(double firstNumber, double secondNumber) {
        return firstNumber > secondNumber;
    }

    public static void main(String[] args) {

        System.out.println(cubeIt(5));
        System.out.println(randomInRange(10,100));
        System.out.println(larger(7,6.99999));
    }
}

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public class Characters {

    /*
    Write a method called countA that accepts a String parameter and
    returns the number of times the character ‘A’ is found in the string.
     */
    public static int countA(String sentence){

        int countA=0;
        for(char letter:sentence.toCharArray()){
            countA+=letter=='A'?1:0;
        }
        return countA;
    }

    /*
    Write a method called multiConcat that takes a String and integer as parameters.
    Return a String that consists of the string parameter concatenated with itself
    count times, where the count is the integer parameter.
     */

    public static String multiConcat(String word, int count){
        String multiWord="";
        for(int time=1;time<=count;time++){
            multiWord+=word;
        }
        return multiWord;
    }

    public static void main(String[] args) {
        System.out.println(countA("At times there is A"));
        System.out.println(multiConcat("hi",3));
    }

}

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