box.java

来自「基于netbeans的java桌面应用程序合集」· Java 代码 · 共 32 行

package com.sun.tiger.generic;

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;
    }
}