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class Student {private int math, english, chinese;public Student() {}public Student(int math, int english, int chinese) {this.chinese = chinese;this.math = math;this.english = english;}public int getMath() {return math;}public void setMath(int math) {this.math = math;}public int getEnglish() {return english;}public void setEnglish(int english) {this.english = english;}public int getChinese() {return chinese;}public void setChinese(int chinese) {this.chinese = chinese;}public double avg() {return (this.chinese + this.english + this.math) / 3;}}public class Test {public static void main(String[] args) {Student s = new Student(60, 78, 90);System.out.println(s.avg());}}