Please download Test.java file from Blackboard under LAB $1$ folder.

Your task is to modify the Singleton class inside the Test.java file, so that it allows creation of only one

instance of Singleton.

Write a main to test your program.

Add a sub$-$class to your hierarchy with the name SubSingleton. Instead of Singleton class, use SubSingleton

to test your main. Modify your code if needed.

Lastly, change the number of SubSingleton instances that can be created. Singleton class allows the creation

of just one instance. SubSingleton should allow three. Use the following guidelines

Test class:

package lab$1$;

class Singleton $\{$

String name;

public Singleton$($String name$)\{$

this.name $=$ name;

$\}$

public String toString$()\{$

return name;

$\}$

$\}$

public class TEST $\{$

public static void main$($String$[]$ args$)\{$

System.out.println$($new Singleton$("$I$1"))$;

$\}$

$\}$