Java 实例：创建学生对象并显示信息

以下是Java代码：

public class Main {
    public static void main(String[] args) {
        Student s1 = new Student('001', 'Tom', 'male', 20);
        Student s2 = new Student('002', 'Lucy', 'female', 19);

        System.out.println('Student 1:');
        System.out.println('ID: ' + s1.getId());
        System.out.println('Name: ' + s1.getName());
        System.out.println('Gender: ' + s1.getGender());
        System.out.println('Age: ' + s1.getAge());

        System.out.println('Student 2:');
        System.out.println('ID: ' + s2.getId());
        System.out.println('Name: ' + s2.getName());
        System.out.println('Gender: ' + s2.getGender());
        System.out.println('Age: ' + s2.getAge());
    }
}

class Student {
    private String id;
    private String name;
    private String gender;
    private int age;

    public Student(String id, String name, String gender, int age) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.age = age;
    }

    public String getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public String getGender() {
        return gender;
    }

    public int getAge() {
        return age;
    }
}

输出结果：

Student 1:
ID: 001
Name: Tom
Gender: male
Age: 20
Student 2:
ID: 002
Name: Lucy
Gender: female
Age: 19

注意：以上代码中定义了一个Student类，用于存储学生的信息。在主类Main中，先创建两个学生对象s1和s2，并给他们赋值，然后分别输出他们的学号、姓名、性别和年龄。