Java面向对象程序设计_1. 创建一个ayyaylist,在其中加入三个职工。职工类employee属性为:姓名name,年

Java实训作业ArrayList应用

代码实现：

package com;
 
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
 
class Employee {
	private String id;
	private String name;
	private char sex;
	private float salary;
 
	public String getId() {
		return id;
	}
 
	public void setId(String id) {
		this.id = id;
	}
 
	public String getName() {
		return name;
	}
 
	public void setName(String name) {
		this.name = name;
	}
 
	public char getSex() {
		return sex;
	}
 
	public void setSex(char sex) {
		this.sex = sex;
	}
 
	public float getSalary() {
		return salary;
	}
 
	public void setSalary(float salary) {
		this.salary = salary;
	}
}
 
interface EmployeeDao {
	public boolean addEmployee(Employee employee);
 
	public boolean delEmployee(String id);
 
	public boolean updateEmployee(String id, Employee employee);
 
	public Employee selectById(String id);
 
	public boolean isExist(Employee employee);
 
	public void showSinglel(Employee employee);
 
	public void showAll();
}
 
public class EmployeeMessage {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		EmployeeDaoImp daoImp = new EmployeeDaoImp();
		other: while (true) {
			System.out.println("*******************");
			System.out.println("* 欢迎您使用职工管理系统 *");
			System.out.println("*                 *");
			System.out.println("*   1:添加职工信息    *");
			System.out.println("*   2:删除职工信息    *");
			System.out.println("*   3:修改职工信息    *");
			System.out.println("*   4:查询职工信息    *");
			System.out.println("*   5:显示所有信息    *");
			System.out.println("*   6:结束运行系统    *");
			System.out.println("*******************");
			System.out.print("请选择要操作的功能：");
			int key = in.nextInt();
			System.out.println();
			switch (key) {
			case 1:
				Employee employee = new Employee();
				System.out.println("请输入职工编号：");
				employee.setId(in.next());
				System.out.println("请输入职工姓名：");
				employee.setName(in.next());
				System.out.println("请输入职工性别(M/F)：");
				employee.setSex(in.next().charAt(0));
				System.out.println("请输入职工工资：");
				employee.setSalary(in.nextFloat());
				System.out.println(daoImp.addEmployee(employee) ? "添加成功" : "添加失败");
				break;
			case 2:
				System.out.println("请输入要删除的职工编号：");
				System.out.println(daoImp.delEmployee(in.next()) ? "删除成功" : "删除失败");
				break;
			case 3:
				System.out.println("请输入要修改的职工编号：");
				Employee QueryEmployee = daoImp.selectById(in.next());
				if (QueryEmployee == null) {
					System.out.println("该员工不存在！");
					System.out.println("添加失败");
					System.out.println("update");
				} else {
					daoImp.showSinglel(QueryEmployee);
					Employee updateEmployee = new Employee();
					System.out.println("请输入职工信息要修改的信息：");
					System.out.println("请输入修改职工姓名：");
					updateEmployee.setName(in.next());
					System.out.println("请输入修改职工性别：");
					updateEmployee.setSex(in.next().charAt(0));
					System.out.println("请输入修改职工薪水：");
					updateEmployee.setSalary(in.nextFloat());
					System.out.println(daoImp.updateEmployee(QueryEmployee.getId(), updateEmployee) ? "修改成功" : "修改失败");
					System.out.println("update");
				}
				break;
			case 4:
				System.out.println("请输入要查询的职工编号：");
				Employee Queremployee = daoImp.selectById(in.next());
				if (Queremployee == null) {
					System.out.println("该员工不存在！");
				} else {
					daoImp.showSinglel(Queremployee);
				}
				break;
			case 5:
				daoImp.showAll();
				break;
			case 6:
				System.out.println("欢迎您再次使用此程序 Bye~");
				in.close();
				break other;
			}
		}
 
	}
}
 
class EmployeeDaoImp implements EmployeeDao {
	private List<Employee> employeeList = new ArrayList<Employee>();
 
	@Override
	public boolean addEmployee(Employee employee) {
		// TODO Auto-generated method stub
		if (!isExist(employee)) {
			employeeList.add(employee);
			return true;
		}
		return false;
 
	}
 
	@Override
	public boolean delEmployee(String id) {
		// TODO Auto-generated method stub
		for (int i = 0; i < employeeList.size(); i++) {
			if (employeeList.get(i).getId().equals(id)) {
				employeeList.remove(i);
				return true;
			}
		}
		return false;
	}
 
	@Override
	public boolean updateEmployee(String id, Employee employee) {
		// TODO Auto-generated method stub
		for (int i = 0; i < employeeList.size(); i++) {
			if (employeeList.get(i).getId().equals(id)) {
				employeeList.get(i).setName(employee.getName());
				employeeList.get(i).setSex(employee.getSex());
				employeeList.get(i).setSalary(employee.getSalary());
				return true;
			}
		}
		return false;
	}
 
	@Override
	public Employee selectById(String id) {
		// TODO Auto-generated method stub
		for (int i = 0; i < employeeList.size(); i++) {
			if (employeeList.get(i).getId().equals(id)) {
				Employee employee = new Employee();
				employee.setId(employeeList.get(i).getId());
				employee.setName(employeeList.get(i).getName());
				employee.setSex(employeeList.get(i).getSex());
				employee.setSalary(employeeList.get(i).getSalary());
				return employee;
			}
		}
		return null;
	}
 
	@Override
	public boolean isExist(Employee employee) { // 判断是否存在
		// TODO Auto-generated method stub
		for (int i = 0; i < employeeList.size(); i++)
			if (employeeList.get(i).getId().equals(employee.getId()))
				return true;
		return false;
	}
 
	@Override
	public void showSinglel(Employee employee) {
		// TODO Auto-generated method stub
		System.out.println("职工编号	职工姓名	职工性别	薪水 ");
		System.out.println(employee.getId() + "  	 " + employee.getName() + "  	 " + employee.getSex() + "  	 "
				+ employee.getSalary());
	}
 
	@Override
	public void showAll() {
		// TODO Auto-generated method stub
		System.out.println("职工编号	姓名	性别	薪水");
		for (Employee employee : employeeList)
			System.out.println(employee.getId() + " " + employee.getName() + "  " + employee.getSex() + "  "
					+ employee.getSalary());
	}
 
}

运行截图：