java - If statement with String comparison fails

I really don't know why the if statement below is not
executing:

if (s ==
            "/quit")
{

            System.out.println("quitted");
}

Below
is the whole class.

It is probably a really
stupid logic problem but I have been pulling my hair out over here not being able to
figure this out.

Thanks for looking
:)

class TextParser extends Thread
            {
 public void run() {
 while (true) {
 for(int i = 0; i
            < connectionList.size(); i++) {
 try { 

            System.out.println("reading " + i);
 Connection c =
            connectionList.elementAt(i); 


            Thread.sleep(200);

 System.out.println("reading " +
            i);

 String s = "";

 if (c.in.ready() == true)
            {
 s = c.in.readLine();
 //System.out.println(i + "> "+
            s);


 if (s == "/quit") {

            System.out.println("quitted");
 }

 if(! s.equals(""))
            {
 for(int j = 0; j < connectionList.size(); j++) {
 Connection
            c2 = connectionList.elementAt(j);
 c2.out.println(s);
 }

            }

 }
 } catch(Exception e){

            System.out.println("reading error");
 }
 }
 }

            }
}