如何使用java集合框架管理employee對(duì)象

小樊
83
2024-09-14 06:24:06
欄目: 編程語言

要使用Java集合框架管理Employee對(duì)象，首先需要?jiǎng)?chuàng)建一個(gè)Employee類，然后使用Java集合類（如ArrayList、HashSet等）來存儲(chǔ)和管理Employee對(duì)象。以下是一個(gè)簡(jiǎn)單的示例：

  1. 創(chuàng)建Employee類：
public class Employee {
    private String name;
    private int age;
    private double salary;

    public Employee(String name, int age, double salary) {
        this.name = name;
        this.age = age;
        this.salary = salary;
    }

    // Getter and Setter methods
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public double getSalary() {
        return salary;
    }

    public void setSalary(double salary) {
        this.salary = salary;
    }

    @Override
    public String toString() {
        return "Employee{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", salary=" + salary +
                '}';
    }
}
  1. 使用ArrayList管理Employee對(duì)象：
import java.util.ArrayList;

public class EmployeeManager {
    public static void main(String[] args) {
        ArrayList<Employee> employees = new ArrayList<>();

        // 添加Employee對(duì)象到ArrayList中
        employees.add(new Employee("張三", 30, 5000));
        employees.add(new Employee("李四", 28, 6000));
        employees.add(new Employee("王五", 35, 7000));

        // 遍歷并打印Employee對(duì)象
        for (Employee employee : employees) {
            System.out.println(employee);
        }

        // 刪除一個(gè)Employee對(duì)象
        employees.remove(1);

        // 更新一個(gè)Employee對(duì)象的信息
        Employee employee = employees.get(1);
        employee.setSalary(8000);

        // 再次遍歷并打印Employee對(duì)象
        System.out.println("After updating:");
        for (Employee emp : employees) {
            System.out.println(emp);
        }
    }
}

在這個(gè)示例中，我們創(chuàng)建了一個(gè)Employee類，然后使用ArrayList來存儲(chǔ)和管理Employee對(duì)象。我們添加了一些Employee對(duì)象，遍歷并打印它們，刪除了一個(gè)對(duì)象，更新了一個(gè)對(duì)象的信息，并再次遍歷并打印Employee對(duì)象。你可以根據(jù)需要使用其他Java集合類（如HashSet、HashMap等）來管理Employee對(duì)象。

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