使用成员变量，成员方法，构造方法和this关键字

public class Student {
int number; //学号
String name; //姓名
float chinese; //语文成绩
float math; //数学成绩
float english; //英语成绩

public Student(int number, String name, float chinese, float math, float english) { //构造有参方法，并用this关键字区分重名的成员变量与变量
this.number = number;
this.name = name;
this.chinese = chinese;
this.math = math;
this.english = english;
}

public void average() { //计算平均分的方法
float aver = (chinese + math + english)/3; //aver表示平均分
System.out.println(number + "\t" + name + "\t" + chinese + "\t" + math + "\t" + english + "\t" + aver);
}

public static void main(String[] args) {
System.out.println("学号\t姓名\t语文\t数学\t英语\t平均分");
System.out.println("——————————————————————————————————————————————————");
Student student1 = new Student(1, "张三", 91.5f, 98f, 89f); //张三的各科成绩
student1.average(); //计算张三的平均分

Student student2 = new Student(2, "李四", 96f, 98.5f, 93f); //李四的各科成绩
student2.average(); //计算李四的平均分

Student student3 = new Student(3, "王五", 97f, 100f, 98.5f); //王五的各科成绩
student3.average(); //计算王五的平均分

Student student4 = new Student(4, "钱六", 77f, 83f, 81f); //钱六的各科成绩
student4.average(); //计算钱六的平均分
}
}