Compiling the code:

mvn clean install

this will result in the following file inside target directory: robot-1.0-SNAPSHOT-jar-with-dependencies.jar

which can be executed directly:

java -jar robot-1.0-SNAPSHOT-jar-with-dependencies.jar

The program can operate in two modes:

1. Receiving input from standard input (as described below)
2. Receiving input from a file

To operate the program with receiving input from standard input, just execute the program as above :

java -jar robot-1.0-SNAPSHOT-jar-with-dependencies.jar

and start giving the command. To exit the program in this mode, just press CTRL-C

To operate the program with input from a file, execute the program as follow:

java -jar robot-1.0-SNAPSHOT-jar-with-dependencies.jar -file <file path>

The application is a simulation of a toy robot moving on a square tabletop, of dimensions 5 units x 5 units.

There are no other obstructions on the table surface.

The robot is free to roam around the surface of the table, but must be prevented from falling to destruction. Any movement that would result in the robot falling from the table must be prevented, however further valid movement commands must still be allowed.

Create an application that can read in commands of the following form -

PLACE X,Y,F
MOVE
LEFT
RIGHT
REPORT

Where PLACE will put the toy robot on the table in position X,Y and facing NORTH, SOUTH, EAST or WEST. The origin (0,0) can be considered to be the SOUTH WEST most corner.

It is required that the first command to the robot is a PLACE command, after that, any sequence of commands may be issued, in any order, including another PLACE command. The application should discard all commands in the sequence until a valid PLACE command has been executed.

Where MOVE will move the toy robot one unit forward in the direction it is currently facing.

Where LEFT and RIGHT will rotate the robot 90 degrees in the specified direction without changing the position of the robot.

Where REPORT will announce the X,Y and F of the robot. This can be in any form, but standard output is sufficient.

A robot that is not on the table can choose the ignore the MOVE, LEFT, RIGHT and REPORT commands.

The toy robot must not fall off the table during movement. This also includes the initial placement of the toy robot. Any move that would cause the robot to fall must be ignored.

Example Input and Output:

a.

PLACE 0,0,NORTH
MOVE
REPORT

Output: 0,1,NORTH

b.

PLACE 0,0,NORTH
LEFT
REPORT

Output: 0,0,WEST

c.

PLACE 1,2,EAST
MOVE
MOVE
LEFT
MOVE
REPORT

Output: 3,3,NORTH