This message contains two words.

The Message class represents messages in this system. A Message must have a device ID$,$ the length of the ID$,$ the length of the message and the text message being sent in order to be a valid message sent through the system. The Message class must determine if a message is valid in order to send a message. A valid message is one where the device ID length matches the given length in the message string and the text message length matches the length of the supplied text message. The text message consists of one or more words where the length of the text message string is at least one character.

Consider the code below:

Message msg$1=$ new Message$("08$ abc$123$xy $16$ Computer Science"$)$; $//$creates a new message object

boolean msg$1$Valid $=$ msg$1.$isValid$()$; $//$ returns true for a valid message

String text $="11$ radio$11$a$28714"$;

Message msg$2=$ new Message$($text$)$;

boolean msg$2$Valid $=$ msg$2.$isValid$()$; $//$ returns false for an invalid message

Message msg$3=$ new Message$("0492$a$116$ Computer Science"$)$;

Message msg$4=$ new Message$("03$ x$8$r $21$ Today is a great day!"$)$;

int numWords $=$ msg$4.$wordCount$()$; $//$returns $5,$ the number of words in the

$//$text message

Complete the Message class by writing the isValid$()$ and wordcount$()$ methods.

public class Message$\{$

private int idLength;

private String deviceID;

private int msgLength;

private String textMsg;

public Message$($String msg$)\{$

$//$implementation not shown

$\}$

public boolean isValid$()\{$

$//$to be written

$\}$

public