用Java编写一个学生类,包括学号、姓名、性别、年龄和记录学生总数的数据成员

public class Student {
private String id; // 学号
private String name; // 姓名
private String gender; // 性别
private int age; // 年龄

private static int total = 0; // 记录学生总数

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

total++;
}

public String getId() {
return id;
}

public String getName() {
return name;
}

public String getGender() {
return gender;
}

public int getAge() {
return age;
}

public static int getTotal() {
return total;
}
}