我还有最后一个Java作业任务，该任务与员工有关， 我的方法应该打印工作了超过“ n”年的员工的姓名和姓氏。
我现在所做的：
public class LastTask {
public static void main(String[] args) {
Employee employee1 = new Employee("Dobrobaba", "Irina", "Ivanovna",
"Moskva", 1900, 6);
Employee employee2 = new Employee("Shmal", "Anna", "Nikolaevna",
"Krasnodar", 2017, 8);
Employee employee3 = new Employee("Kerimova", "Niseimhalum", "Magomedmirzaevna",
"New-York", 2010, 3);
Employee employee4 = new Employee("Dobryden", "Yuri", "Viktorovich",
"Auckland", 2000, 11);
Employee employee5 = new Employee("Lopata", "Leonid", "Nikolaevich",
"Beijing", 2014, 11);
}
/**
* Prints employees' information, which have worked more than 'n' year(s) for now.
*
* @param n years quantity
* @return the String, contained surname, name, patronymic and address of the specific employee(s).
*/
public static String displayEmployees(int n) {
return null;
}
}
class Employee {
private String surname;
private String name;
private String patronymic;
private String address;
private int employmentYear;
private int employmentMonth;
Employee(String surname, String name, String patronymic, String address, int employmentYear, int employmentMonth) {
this.surname = surname;
this.name = name;
this.patronymic = patronymic;
this.address = address;
this.employmentYear = employmentYear;
this.employmentMonth = employmentMonth;
}
public String getSurname() {
return surname;
}
public void setSurname(String surname) {
this.surname = surname;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPatronymic() {
return patronymic;
}
public void setPatronymic(String patronymic) {
this.patronymic = patronymic;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public int getEmploymentYear() {
return employmentYear;
}
public void setEmploymentYear(int employmentYear) {
this.employmentYear = employmentYear;
}
public int getEmploymentMonth() {
return employmentMonth;
}
public void setEmploymentMonth(int employmentMonth) {
this.employmentMonth = employmentMonth;
}
}
我创建了一个参数化的构造函数，用于创建具有多个参数的员工，并且还封装了参数。
不知道下一步要做什么，任务说我可以使用List / ArrayList，但是经过一段时间的搜索之后，我仍然不明白如何实现例如if (employmentYear - currentYear >= n) then return employee1, employee4之类的条件。
你能给我一些提示吗？
谢谢您的关注。
答案 0 :(得分：2)
您可以创建一个static ArrayList并将所有所有员工添加到该ArrayList中，然后在displayEmployees方法中，您可以根据条件if employee EmploymentYear greater than n print details and add to another list流式传输列表，因此如果您希望您可以只返回员工人数或也可以返回员工列表
public class LastTask {
static List<Employee> employee = new ArrayList<>();
public static void main(String[] args) {
Employee employee1 = new Employee("Dobrobaba", "Irina", "Ivanovna",
"Moskva", 1900, 6);
Employee employee2 = new Employee("Shmal", "Anna", "Nikolaevna",
"Krasnodar", 2017, 8);
Employee employee3 = new Employee("Kerimova", "Niseimhalum", "Magomedmirzaevna",
"New-York", 2010, 3);
Employee employee4 = new Employee("Dobryden", "Yuri", "Viktorovich",
"Auckland", 2000, 11);
Employee employee5 = new Employee("Lopata", "Leonid", "Nikolaevich",
"Beijing", 2014, 11);
employee.add(employee1);
employee.add(employee2);
employee.add(employee3);
employee.add(employee4);
employee.add(employee5);
}
/**
* Prints employees' information, which have worked more than 'n' year(s) for now.
*
* @param n years quantity
* @return the String, contained surname, name, patronymic and address of the specific employee(s).
*/
public static int displayEmployees(int n) {
List<Employee> finalList = new ArrayList<>();
employee.stream().forEach(emp->{
if(emp.getEmploymentYear()-Year.now().getValue()>=n) {
System.out.println("Employee Name : "+emp.getName()+" Sur Aame : "+emp.getSurname());
finalList.add(emp);
}
});
return finalList.size();
}
}
答案 1 :(得分：1)
如果您正在寻找“工作了'n'年以上” 的方法，这可能会对您有所帮助。
"@angular/animations": "^6.1.3"答案 2 :(得分：1)
在Employee类中添加适当的toString()方法以获取所需的输出，此外，我还使用了Stream对象中的filter()方法来过滤Employee对象。我将工作年数作为输入参数，并从employmentYear字段中计算了工作年限。
package com.company;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.List;
import java.util.stream.Collectors;
public class LastTask {
private static List<Employee> listEmps;
public static void main(String[] args) {
Employee employee1 = new Employee("Dobrobaba", "Irina", "Ivanovna",
"Moskva", 1900, 6);
Employee employee2 = new Employee("Shmal", "Anna", "Nikolaevna",
"Krasnodar", 2017, 8);
Employee employee3 = new Employee("Kerimova", "Niseimhalum", "Magomedmirzaevna",
"New-York", 2010, 3);
Employee employee4 = new Employee("Dobryden", "Yuri", "Viktorovich",
"Auckland", 2000, 11);
Employee employee5 = new Employee("Lopata", "Leonid", "Nikolaevich",
"Beijing", 2014, 11);
listEmps = new ArrayList<>(Arrays.asList(employee1,employee2,employee3,employee4,employee5));
//display employee details of employees who worked more than 17 years.
displayEmployees(17);
}
/**
* Prints employees' information, which have worked more than 'n' year(s) for now.
*
* @param n years quantity
* @return the String, contained surname, name, patronymic and address of the specific employee(s).
*/
public static void displayEmployees(int n) {
int year = Calendar.getInstance().get(Calendar.YEAR);
listEmps.stream()
.filter(emp ->{
return year - emp.getEmploymentYear() > n;
})
.collect(Collectors.toList())
.forEach(System.out::println);
}
}
class Employee {
private String surname;
private String name;
private String patronymic;
private String address;
private int employmentYear;
private int employmentMonth;
Employee(String surname, String name, String patronymic, String address, int employmentYear, int employmentMonth) {
this.surname = surname;
this.name = name;
this.patronymic = patronymic;
this.address = address;
this.employmentYear = employmentYear;
this.employmentMonth = employmentMonth;
}
public String getSurname() {
return surname;
}
public void setSurname(String surname) {
this.surname = surname;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPatronymic() {
return patronymic;
}
public void setPatronymic(String patronymic) {
this.patronymic = patronymic;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public int getEmploymentYear() {
return employmentYear;
}
public void setEmploymentYear(int employmentYear) {
this.employmentYear = employmentYear;
}
public int getEmploymentMonth() {
return employmentMonth;
}
public void setEmploymentMonth(int employmentMonth) {
this.employmentMonth = employmentMonth;
}
@Override
public String toString(){
return "Employee details: " + this.name + this.surname + this.address + this.employmentYear;
}
}