JAVA

1.

/**

* This is an example of Javadoc documentation.

* The task is to:

* 1. Describe what the doSomething method does in at most 3 sentences as a Javadoc documentation.

* 2. Include a main method to call doSomething with some appropriate data and display the returned value.

*/

class DoSomething {

public static int doSomething(int[] d, int t) {

int j = 0;

while ((j < d.length) && (d[j] != t))

j++;

return j;

}

}

2.

/*

* This is a regular comment block.

* The task is to:

* 1. Modify the getDouble method to use exception handling (with an appropriate message displayed)

* and zero as the default value if a valid number is not entered. (2)

*/

import java.util.Scanner; // loads Scanner definition for our use

public class InputExample {

public static void main(String[] args) {

System.out.print("Enter your age in years: ");

double age = getDouble();

System.out.print("Enter your maximum heart rate: ");

double rate = getDouble();

double fb = (rate - age) * 0.65;

System.out.println("Your ideal fat-burning heart rate is " + fb);

}

public static double getDouble() {

Scanner input = new Scanner(System.in);

while (!input.hasNextDouble()) {

input.nextLine();

System.out.print("Invalid value; please enter an number: ");

}

double i = input.nextDouble();

return i;

}

}