Question

I need java code for the following problem.

Lab 7: Methods 1. Write a Java program called Numbers that calls the following methods and displays the returned value: Write a method called cubelt that accepts one integer parameter and returns the value raised to the third power as an integer. o Write a method called randominRange that accepts two integer parameters representing a range. The method returns a random integer in the specified range inclusive. 2. 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: 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". o .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 Plan each method before coding. Write down what values(s) are sent to the method and what is returned. For example, the cubelt method: * receives one integer from main. returns an integer to main The method header should look like this: public static int cubeltlint x) *you don't have to use the name x. The randomlnRange method receives two integers from main. returns one integer to main. The method header should look like this: public static int randonlnRange(int start, int ena) you don't have to use the name start and end.

Answer 1

Please find the answer below, I have mentioned all the details in the comments:

Main.java

public class Main {
    public static void main(String[] args) {
        //test for all the methods
        System.out.println("Test for cubeIt");
        System.out.println("return value of cubeIt(2): " + Numbers.cubeIt(2));
        System.out.println("return value of cubeIt(3): " + Numbers.cubeIt(3));
        System.out.println();
        System.out.println("Test for randomInRange");
        System.out.println("return value of randomInRange(2): " + Numbers.randomInRange(10,20));
        System.out.println("return value of randomInRange(2): " + Numbers.randomInRange(1,5));

        System.out.println();
        System.out.println("Test for countA");
        System.out.println("return value of countA(\"RANDOM\"): " + Characters.countA("RANDOM"));
        System.out.println("return value of countA(\"ABCABCAA\"): " + Characters.countA("ABCABCAA"));

        System.out.println();
        System.out.println("Test for countA");
        System.out.println("return value of multiConcat(\"hi\",3): " + Characters.multiConcat("hi",3));

    }
}

class Numbers{
    public static int cubeIt(int x){
        //returnt the x^3 using pow method
        return (int)Math.pow(x,3);
    }

    public static int randomInRange(int min,int max){
        int val;
        //get the value using Math.Random()
        val = min + (int)(Math.random() * ((max - min) + 1));
        return val;
    }
}

class Characters{
    public static int countA(String val){
        int count = 0;

        //count each character by comparing it with the 'A'
        for (int i=0; i<val.length(); i++)
        {
            // checking character in string
            if (val.charAt(i) == 'A')
                count++;
        }
        return count;
    }

    public static String multiConcat(String s, int count){
        //get the string builder object
        StringBuilder sb = new StringBuilder();
        while(count-- > 0){
            //conacat for count times
            sb.append(s);
        }
        //return string value
        return sb.toString();
    }
}

Output:

"C:\Program Files Java jdk1.8.0_151 binljava" .. . Test for cubeIt return value of cubeIt (2): 8 11 |료 return value of cube It (3): 27 Test for randomInRange return value of randomInRange (2): 20 return value of randomInRange (2): 3 血! Test for countA return value of countA ("RANDOM") 1 return value of countA ("ABCABCAA"): 4 Test for countA 2 return value of multiconcat ("hi",3): hihihi