//: holding/StackCollision.java public class StackCollision { public static void main(String[] args) { net.mindview.util.Stack stack = new net.mindview.util.Stack<>(); for(String s : "My dog has fleas".split(" ")) stack.push(s); while(!stack.empty()) System.out.print(stack.pop() + " "); System.out.println(); java.util.Stack stack2 = new java.util.Stack<>(); for(String s : "My dog has fleas".split(" ")) stack2.push(s); while(!stack2.empty()) System.out.print(stack2.pop() + " "); } } /* Output: fleas has dog My fleas has dog My *///:~