unit.java

javaSE以控制台操作

import java.util.ArrayList;

public class Unit {

	/**
	 * 空构造方法
	 */
	public Unit() {

	}

	/**
	 * 向studentList列表中添加一个学生到适当索引值上,如果列表中存在和要添加的学生ID一样的学生,则不能添加学生
	 * 
	 * @param newSto
	 */
	public void addStudent(Student newSto) {
		String ID = newSto.getID();
		boolean b = false;
		boolean a = false;
		for (int i = 0; i < studentList.size(); i++) {
			if (ID.equalsIgnoreCase(studentList.get(i).getID())) {
				b = true;
			}
		}
		if (studentList.size() == 0) {
			studentList.add(position(ID), newSto);
			a = true;
		}
		if (!a && !b) {
			studentList.add(position(ID), newSto);
			System.out
					.println("The new student's information has been inserted successfully!");
		} else {
			System.out.println("There is a student whose ID is "
					+ newSto.getID() + "in this unit already!");
		}

	}

	/**
	 * 删除studengList列表上一个指定ID的学生的信息,如果没有该学生则不能删除
	 * 
	 * @param deteleID
	 */

	public void deleteStudent(String deteleID) {
		boolean b = false;
		for (int i = 0; i < studentList.size(); i++) {
			if (deteleID.equalsIgnoreCase(studentList.get(i).getID())) {
				b = true;
			}
		}
		if (b) {
			studentList.remove(anotherposition(deteleID));
			System.out
					.println("The student's information has been deleted successfully!");
		} else {
			System.out.println("No student has the ID " + deteleID + "!");
		}

	}

	/**
	 * 设置属性unitName的值
	 * 
	 * @param unitName
	 */

	public void setUnitName(String unitName) {
		this.unitName = unitName;

	}

	/**
	 * 设置属性name,gender,department的值
	 * 
	 * @param name
	 * @param gender
	 * @param department
	 */

	public void setlnstructor(String name, String gender, String department) {
		instructor = new Staff(name, gender, department);

	}

	/**
	 * 查找要添加的学生应添加的位置索引值
	 * 
	 * @param ID
	 * @return
	 */

	public int position(String ID) {
		int a = 0;
		for (int i = 0; i < studentList.size(); i++) {
			if (ID.compareToIgnoreCase(studentList.get(i).getID()) < 0) {
				a = i;
			}
			if (ID.compareToIgnoreCase(studentList.get(i).getID()) > 0) {
				a = i + 1;
			}
		}
		return a;
	}

	/**
	 * 查找要删除的学生的位置索引值
	 * 
	 * @param ID
	 * @return
	 */
	public int anotherposition(String ID) {
		int a = 0;
		for (int i = 0; i < studentList.size(); i++) {
			if (ID.compareToIgnoreCase(studentList.get(i).getID()) == 0) {
				a = i;
			}
		}
		return a;
	}

	/**
	 * 重写toString()方法
	 */

	public String toString() {
		String s = "-------------------------------------------------\n";
		s += "             ******Unit Report******\n";
		s += "Unit Name:" + unitName + "\n";
		s += "-------------------------------------------------\n";
		s += instructor.toString() + "\n";
		s += "-------------------------------------------------\n";
		s += "ID\tName\tGender\tAge\tScore\tGrade\n";
		s += "-------------------------------------------------\n";
		for (int i = 0; i < studentList.size(); i++) {
			s += studentList.get(i).toString() + "\n";
		}
		s += "-------------------------------------------------\n";
		return s;
	}

	private String unitName;
	private Staff instructor;
	private ArrayList<Student> studentList = new ArrayList<Student>();

}