Lock.java (don't know how to construct a method)

[nelsonkkyy]

Quote:

/**
This is class tests the Lock objects.
*/
import java.util.* ;

public class Main
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in) ;

Lock lock = new Lock('C', 'A', 'K') ;
lock.set('C') ; // first turn
System.out.print("The lock will open? ") ;
lock.pull() ; // try
System.out.println(lock.isOpen()) ;
System.out.println("Expected: false") ; // only one turn

lock.set('A') ; // second turn
System.out.print("The lock will open? ") ;
lock.pull() ; // try
System.out.println(lock.isOpen()) ;
System.out.println("Expected: false") ; // only two turns

lock.set('K') ; // third turn
System.out.print("The lock is open? ") ;
System.out.println(lock.isOpen()) ;
System.out.println("Expected: false") ; // haven't pulled yet
System.out.print("The lock will open? ") ;
lock.pull() ; // try
System.out.println(lock.isOpen()) ;
System.out.println("Expected: true") ; // correct combination

lock.set('L') ; // turning dial while lock is open
System.out.print("The lock is open? ") ;
System.out.println(lock.isOpen()) ;
System.out.println("Expected: true") ; // it is still open

lock.close() ; // closing the lock resets dials
System.out.print("The lock is open? ") ;
System.out.println(lock.isOpen()) ;
System.out.println("Expected: false") ; // we just closed it

System.out.println("Give the combination of a new lock as a 3 letter string") ;
String combo = scanner.next() ;
System.out.println("Give the tolerance of this lock as an int") ;
int tolerance = scanner.nextInt() ;

Lock lock = new Lock(combo.charAt(0), combo.charAt(1),
combo.charAt(2), tolerance) ;
System.out.println("Give a 5 letter string which represents an effort to open the lock.") ;
combo = scanner.next() ;
lock.set(combo.charAt(0)) ;
lock.set(combo.charAt(1)) ;
lock.set(combo.charAt(2)) ;
lock.set(combo.charAt(3)) ;
lock.set(combo.charAt(4)) ;
System.out.print("The lock will open? ") ;
lock.pull() ; // try
System.out.println(lock.isOpen()) ;

}
}

this is the method

Quote:

public class Lock
{
private string letter1,letter2,letter3 ;

public Lock (string letter1,letter2,letter3)
{
this.letter1 = letter1;
this.letter2 = letter2;
this.letter3 = letter3;
}

public string set()
{


}

public string pull()
{
if (letter1 = letter2

}


public boolean isOpen()
{

}

public string close()
{


}
}

Anyone can give me a hand???[/quote]

[Tony]

give you a hand with what?

[nelsonkkyy]

like how to make a method to read the (C A K) from the LockTester
How to read them one by one.

[Tony]

method arguments

code:

lock.set('C') ; // first turn

method set() receives an argument with a value 'C'

[nelsonkkyy]

kk so when i compile it, it says the scanner was not found. What should i do??

[Tony]

You should tell the compiler where to find Scanner.

[nelsonkkyy]

Quote:

public class Lock
{

//instance variables
char word;
char password;
boolean status = true;
/**
Constructs the object and sets the instance variables to given values.
@param a one of the three values
@param b one of the three values
@param c one of the three values
*/
public Lock(char x ,char y ,char z )
{

password = x + y + z; ////how can i add up the three chars??////
System.out.println(password);
}

[Tony]

sure, you can do that

code:

'a' + 1 == 'b'

Not sure what meaning x+y+z would have though. What character do you want password to be?

Quote:

char password;

[nelsonkkyy]

The password is (char x char y and char z) which are (C, A, K) from

Quote:

Lock lock = new Lock('C', 'A', 'K') ;