java 返回 ArrayList<Teacher>示例

import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        ArrayList<Teacher> teachers = new ArrayList<Teacher>();
        teachers.add(new Teacher("John", "Smith"));
        teachers.add(new Teacher("Jane", "Doe"));
        teachers.add(new Teacher("Bob", "Johnson"));
        
        for (Teacher teacher : teachers) {
            System.out.println(teacher.getFirstName() + " " + teacher.getLastName());
        }
    }
}

class Teacher {
    private String firstName;
    private String lastName;

    public Teacher(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }
}

这是一个简单的示例，在这里，我们定义了一个Teacher类，并在main方法中创建了一个ArrayList来存储Teacher对象。我们在ArrayList中添加了三个Teacher对象，然后遍历ArrayList并打印出每个Teacher的firstName和lastName。