JAVA: Program to mimic browser back and forward actions.

JAVA: Program to mimic browser back and forward actions.

switch(input) {
    case "BACKWARD":
    if (!backward.empty())
     forward.push(backward.pop());  // Remove from backward, add to forward
    break;

    case "FORWARD":
    if (!forward.empty())
     backward.push(forward.pop());  // Remove from forward, add to backward
    break;

    default:
    backward.push(input);      // New page opened
    while (!forward.empty())   // Clear forward stack
     forward.pop();
    break;

 }

http://taniachattopadhyay.blogspot.in/p/objective-queue-in-application-task.html