Chapter 12, Problem 7E

Explanation of Solution

Method definition:

//method definition

public void writeChars(int n)

 {

    //if condition to validate the value of n is less than 1

    if (n < 1)

    {

        //throw illegal exception error

        throw new IllegalArgumentException();

    }

    //else part to validate the value being 1

    else if (n == 1)

    {

        //display the "*"

        System.out.print("*");

    }

    //else part to validate the value being 2

    else if (n == 2)

    {

        //display the "*"

        System.out...