package com.oreilly.tiger.ch02;
import java.util.ArrayList;
import java.util.List;
public class Box<T> {
protected List<T> contents;
public Box() {
contents = new ArrayList<T>();
}
public int getSize() {
return contents.size();
}
public boolean isEmpty() {
return (contents.size() == 0);
}
public void add(T o) {
contents.add(o);
}
public T grab() {
if (!isEmpty()) {
return contents.remove(0);
} else
return null;
}
} |