package views;
import java.util.*;
public class FrameStack {
private static FrameStack instance;
private ArrayList<Frame> stack;
private FrameStack() {
stack = new ArrayList<Frame>();
}
public static FrameStack getInstance() {
if (instance == null) {
instance = new FrameStack();
}
return instance;
}
public Frame peek() {
return stack.get(0);
}
public void push(Frame frame) {
if (!stack.isEmpty())
peek().setVisible(false);
frame.setVisible(true);
stack.add(0, frame);
}
public void pop() {
if (!stack.isEmpty()) {
peek().dispose();
stack.remove(0);
if (!stack.isEmpty()) {
peek().setVisible(true);
}
}
}
}