changegradetrans.java

来自「国外的数据结构与算法分析用书」· Java 代码 · 共 21 行

package Transactions;

import Entities.*;
import Sets.StudentSet;

/**	Change one student's grade for a course section */
public class ChangeGradeTrans
{

	public void execute(int studentNum, CallNum callN, String mark)
	{
		GradeRecord newRecord = new GradeRecord(callN, mark, 0, 0, 0);
		StudentSet.rep.search(new Integer(studentNum));
		if (StudentSet.rep.itemExists())
		{
			Student student = (Student)StudentSet.rep.item();
			student.changeGrade(newRecord);
		}
	}

} /* end of ChangeGradeTrans */