SimpleTimer

SimpleTimer -- defining a main method for testing a class.

This class represents a simple timer that tracks and reports elapsed time in seconds. The class's main method conducts an extremely simple test of the class.

To see this example in action:

Compile the Java source file, SimpleTimer.java:
```
	javac SimpleTimer.java
```
Run the class:
```
	java SimpleTimer
```

Output:

    Test of class SimpleTimer:  passed.

The source.