list.java

源程序可使用Jdk1.3以上的任何版本编译和运行主类是Simulator也可以在eclipse环境下直接编译和运行。 顾客队列服务模拟系统

/*
 * 创建日期 2005-2-26
 * 
 * TODO 要更改此生成的文件的模板，请转至 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
package simulator;

public class List {
    private int maxItems = 100;

	/**
	 * 
	 * @uml.property name="numItems" 
	 */
	private int numItems = 0;


    private Object[] list = null;

    public List() {
        list = new Object[maxItems];
    }

    public List(int _maxItems) {
        maxItems = _maxItems;
        list = new Object[maxItems];
    }

    public void add(Object obj) {
        /*
         * ASSUMES that there is room to add obj, i.e. assumes that numItems <
         * maxItems.
         */
        list[numItems] = obj;
        numItems++;
    }

	/**
	 * 
	 * @uml.property name="numItems"
	 */
	public void delete(int pos) {
		// ASSUMES that pos is between 0 and numItems
		for (int i = pos + 1; i < numItems; i++) {
			list[i - 1] = list[i];
		}
		numItems--;
	}


    public Object get(int pos) {
        return list[pos];
    }

	/**
	 * 
	 * @uml.property name="numItems"
	 */
	public int getSize() {
		return numItems;
	}

    public boolean isFull() {
        return (numItems >= maxItems);
    }

    public String toString() {
        String s = new String();
        for (int i = 0; i < numItems; i++) {
            s += "\n" + list[i].toString();
        }
        return s + "\n";
    }
}