abstractanswer.java

考试系统

package paper;

import java.io.Serializable;
import java.util.Vector;
/**
 * @author SpiritRain
 *
 * Abstract class of answers
 * 
 */
public abstract class AbstractAnswer implements Serializable {
	/**
	 * answers
	 */
	protected Vector answer;
	/**
	 * how many answers
	 */
	protected int answerCount;

	/**
	 * create an answer
	 * @param ans answers
	 */
	public AbstractAnswer(Object[] ans) {
		this.answerCount = ans.length;
		this.answer = new Vector();
		for (int i = 0; i < answerCount; i++) {
			this.answer.add(ans[i]);
		}
	}
	
	/**
	 * get how many answer in it
	 * @return answer acount
	 */
	public int getAnsCount() {
		return answerCount;
	}
	
	/**
	 * get an answer 
	 * @param index answer index
	 * @return Object of answer
	 */
	public Object getAnswer(int index) {
		return answer.get(index);
	}

	/**
	 * set answer
	 * @param index answer index
	 * @param obj answer object
	 */
	public void setAnswer(int index, Object obj) {
		answer.set(index, obj);
	}
}