How to define an array of objects in Java?

In Java, you can define an array of objects by following these steps:

1. Firstly, it is necessary to define a class for an object. For example, if we want to define a student object, we can create a class called “Student” that includes the attributes and methods of a student.

public class Student {
    private String name;
    private int age;

    // 构造方法
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }

    // 获取姓名
    public String getName() {
        return name;
    }

    // 获取年龄
    public int getAge() {
        return age;
    }
}

1. Then, an object array can be defined in the main program and each object within the array instantiated. For example, an array of student objects called “students” can be created, containing 3 student objects.

public class Main {
    public static void main(String[] args) {
        // 定义学生对象数组
        Student[] students = new Student[3];

        // 实例化学生对象，并添加到数组中
        students[0] = new Student("张三", 18);
        students[1] = new Student("李四", 19);
        students[2] = new Student("王五", 20);

        // 遍历学生对象数组，输出每个学生的姓名和年龄
        for (int i = 0; i < students.length; i++) {
            System.out.println("学生姓名：" + students[i].getName());
            System.out.println("学生年龄：" + students[i].getAge());
        }
    }
}

1. Run the program to output the name and age of each student object.

Note: When defining an array of objects, it is necessary to specify the size of the array first, and then access each object in the array using an index.