Problem with Array search

[Karl Vaicek]

Hello, everyone,

I'm programming socket, but my protocol doesn't work fine.. Client sends card number (xxxx xxxx xxxx xxxx) which is defined in servers protocols string array.

 
        private float amount; 
	private boolean fuelCheck = false;
	private boolean sumCheck = false;
	private int state = WAITING;
	private int card;
	private int priceIndex;
	private int theInputInt;
	private int thePriceInt;
	private boolean cardCheck = false;
private String[] cardNr = { "1234 4321 5678 8765","1111 2222 3333 4444",
					"9999 8888 7777 6666","1111 0000 1111 0000" };
	
	private String[] cardPIN = { "8765","4444","6666","0000" }; 
	
	private int[] cardBalance = { 200, 250, 300, 400 };
	
	private float[] fuelPrices = {4.03f, 4.14f, 1.98f, 3.41f};                                         
	
	private String[] fuelType = { "A95","A98","LPG","Diesel" };
	
	
	public String mainInput(String theInput) {
		
		String theOutput = null;
		
		if (state == WAITING) {
		
			theOutput = "Hi! Please enter your card number (xxxx xxxx xxxx xxxx):";
			state = SETCARDNR;
			
		} else if (state == SETCARDNR) {
		
			for(int i = 0; i < 4; i++) {                                         // problem?
				
				if(cardNr[i] == theInput){
					card = i;
					cardCheck = true;
					break;
				}
			}
			
			if(cardCheck) {         
				
				theOutput = "please enter cards "+theInput+" PIN code";
				state = SETCARDPIN;
				cardCheck = false;
				
			} else {
			
				theOutput = "Your card is not in our database. Try again " + theInput +" "+ card;
				
				}

   

(that's not the whole code)

But problem is somewhere here, because if I enter corect card number (which is defined in array), i get :

>Your card is not in our database. Try again 1111 0000 1111 0000 0

I think, that my for loop is alright, but I don't understand why it's not working...

I will be grateful for your help!

[Rob Spoor]

== uses object instance equality. Use the equals method to compare your strings instead.

[Karl Vaicek]

Thank you!!!

[Karl Vaicek]

Rob Prime wrote:== uses object instance equality. Use the equals method to compare your strings instead.

THANK YOU! That was so easy, but i couldn't figure it out :/

[Rob Spoor]

You're welcome.