testselectcourse.java

这是我们学校的JAVA程序设计课程的所有实验程序

package shixyan2;

import javax.swing.JOptionPane;

public class TestSelectCourse {
	private int num, stuid;

	public boolean isExistCourseName(String couName, Course[] course) {
		int flag = 0;
		for (int j = 0; j < course.length; j++) {
			if (couName.equals(course[j].getCourseName())) {
				flag = 1;
				num = j;
				break;
			}
		}
		if (flag == 1) {
			return true;
		} else
			return false;
	}

	public boolean isExistId(Student[] stu, int id) {

		if (id > 1000 && id <= stu.length + 1000) {
			for (int j = 0; j < stu.length; j++) {
				if (id == stu[j].getStudentId()) {
					stuid = j;
				}
			}
			return true;
		} else
			return false;

	}

	public boolean isLegalScore(double score) {

		if (score >= 0.0 && score <= 100.0) {
			return true;
		} else
			return false;
	}

	public void find(int id, SelectCourse[] sc, Student[] stu) {
		System.out.println("根据学号搜索的结果如下：");
		System.out.println("学号：" + id + " 姓名："
				+ stu[id - 1001].getStudentName() + " 选课门数："
				+ stu[id - 1001].getCourseNum());
		for (int i = 0; i < sc.length; i++) {
			while (id == sc[i].getStudentId()) {
				System.out.println("课程名称：" + sc[i].getCourseName() + " 该课程的分数："
						+ sc[i].getScore());
				break;
			}
		}
		// System.out.println("根据学号搜索的结果如下：");
		// System.out.println("学号：" + id + " 姓名："
		// + stu[id - 1001].getStudentName() + " 选课门数："
		// + stu[id - 1001].getCourseNum());
		// for (int i = 0; course[i] != null; i++) {
		// System.out.println("课程名称：" + course[i] + " 该课程的分数：" + score[i]);
		// }

	}

	public static void main(String[] args) {
		TestSelectCourse tsc = new TestSelectCourse();
		Student[] stu = new Student[] { new Student("Alice"),
				new Student("Bob"), new Student("Cindy"), new Student("tom") };
		Course[] course = new Course[] { new Course("java", 3),
				new Course("c", 2), new Course("c++", 2) };
		SelectCourse[] sc = new SelectCourse[10];
		String n = JOptionPane.showInputDialog("您要输入几条选课信息(0到10):");
		// 对每条选课信息处理
		for (int i = 0; i < Integer.parseInt(n); i++) {
			int j;
			String stuId = JOptionPane
					.showInputDialog("请输入学号（1001~100*，*为学生人数上限[4]）:");
			String couName = JOptionPane
					.showInputDialog("请输入课程名(1 java,2 c,3 c++):");
			String score = JOptionPane.showInputDialog("请输入分数:");
			int id = Integer.parseInt(stuId);
			double s = Double.parseDouble(score);

			if (!tsc.isExistId(stu, id)) {
				JOptionPane.showMessageDialog(null, "对不起,此学号不存在，请重新录入此条成绩！");
				i--;
				continue;
			} else if (!tsc.isExistCourseName(couName, course)) {
				JOptionPane.showMessageDialog(null, "对不起,没有您输入的课程名，请重新录入此条成绩！");
				i--;
				continue;
			} else if (!tsc.isLegalScore(s)) {
				JOptionPane.showMessageDialog(null, "对不起,您输入的成绩不合法，请重新录入此条成绩！");
				i--;
				continue;
			} else
				// 满足条件，录入成绩
				sc[i] = new SelectCourse(id, couName, s);
			// 判断是否重复选课！
			if (i != 0) {
				for (int k = 0; k < i; k++) {
					if (sc[i].getStudentId() == sc[k].getStudentId()
							&& sc[i].getCourseName().equals(
									sc[k].getCourseName())) {
						JOptionPane.showMessageDialog(null,
								"该生已经选此课程，请重新录入此条成绩！");
						i--;
						continue;
					} else
						break;
				}
			}

			// addCourse
			course[tsc.num].addCourse(s);
			int c = course[tsc.num].getCreditHour();

			// 学生课程数+1 重算平均分
			stu[tsc.stuid].setCourseNum();
			stu[tsc.stuid].setAverageScore(s);
			if (s > 60) { // 如果分数及格,将本门课的学分加入总学分
				stu[tsc.stuid].setCreditHour(c);
			}
		}

		System.out.println("平均分大于60的学生信息如下：");
		for (int i = 0; i < stu.length; i++) {
			if (stu[i].getAverageScore() > 60)
				stu[i].print();
		}
		System.out.println("课程信息如下：");
		for (int i = 0; i < course.length; i++) {
			course[i].print();
		}
		System.out.println("选课信息如下：");
		for (int i = 0; sc[i] != null; i++) {
			sc[i].print();
		}
		String yn = JOptionPane.showInputDialog(null,
				"成绩录入完毕,是否要查找学生选课信息？(y/n按确定退出)");
		if (yn.equals("y") || yn.equals("Y")) {
			String sId = JOptionPane
					.showInputDialog("请输入查找学生的ID号（1001~100*，*为学生人数上限[4]）:");
			tsc.find(Integer.parseInt(sId), sc, stu);
		} else
			System.exit(0);

	}
}