1. Identify and fix the errors in the following program: public class Exercise10 { public static void main(String[] args) { Exercise10 ex = new Exercise10(); System.out.println(ex); } // end main...

1. Identify and fix the errors in the following program:

public class Exercise10

{

public static void main(String[] args)

{

Exercise10 ex = new Exercise10();

System.out.println(ex);

} // end main

public Exercise10()

{

Exercise10 ex = new Exercise10();

} // end default constructor

} // end Exercise10

2. Consider the method displayRowOfCharacters that displays any given character the specified number of times on one line. For example, the call

displayRowOfCharacters('*', 5);

produces the line

*****

Implement this method in Java by using recursion.