java中学生成绩录入和平均值最值的求取

Question

这是题目要求

想问一下我写的这个求最值哪里出错了，还有平均值的求取怎么写

class Student{
    private int sNo;
    private String sName;
    private String sSex;
    private int sAge;
    private int sJava;
    public Student(int sNo,String sName,String sSex,int sAge,int sJava) {
        this.sNo = sNo;
        this.sName = sName;
        this.sSex = sSex;
        this.sAge = sAge;
        this.sJava = sJava;
    }
    public void info() {
        System.out.println("学号：" + this.sNo + "  姓名：" + this.sName +"  性别：" + this.sSex + "  年龄：" + this.sAge + "  Java成绩：" + this.sJava);
    }
    public int getNo ( ) {
        return sNo;
    }
    public void setNo (int sNo) {
        this.sNo = sNo;
    }
    public String getName ( ) {
        return sName;
    }
    public void setName (String sName) {
        this.sName = sName;
    }
    public String getSex ( ) {
        return sSex;
    }
    public void setSex (String sSex) {
        this.sSex = sSex;
    }
    public int getAge ( ) {
        return sAge;
    }
    public void setAge (int sAge) {
        this.sAge = sAge;
    }
    public int getJava ( ) {
        return sJava;
    }
    public void setJava (int sJava) {
        this.sJava = sJava;
    }
}
public class GradeAverage{
    public static void main(String[] args) {
        Student stu1 = new Student (210101, "张三", "男", 18, 84);
        Student stu2 = new Student (210102, "李四", "男", 19, 71);
        Student stu3 = new Student (210103, "王五", "男", 20, 78);
        Student stu4 = new Student (210104, "钱一", "男", 19, 88);
        Student stu5 = new Student (210105, "赵六", "男", 18, 67);
        stu1.info();
        stu2.info();
        stu3.info();
        stu4.info();
        stu5.info();
        int arr[] = {84,71,78,88,67};
        int max = getMax(arr);
        System.out.println("Java成绩最高分为" + max + "分");
        int min = getMin(arr);
        System.out.println("Java成绩最低分为" + min + "分");
    }
    static int getMax(int arr[]) {
        int x = 1 ;
        int max = arr[x];
        for (int i = 1; i < arr.length; i++) {
            if (arr[i] > max) {
                max = arr[i];
            }
        }
        return 0;
    }
    static int getMin(int arr[]) {
        int x = 0;
        int min = arr[x];
        for (int i = 1; i < arr.length; i++) {
            if (arr[i] > min) {
                min = arr[i];
            }
        }
        return 0;
    }
}

Answer 1

问题1：最大值和最小值返回时有问题，最大值return max 最小值return min;两个不是return 0;
问题2：求最大值，应该是int x=0，（你写的是x=1,如果第一个数为最大值，输出结果可不是）
问题3：还有最小值判断是if（arr[i]<min）{…}