需要Java数组帮助使用scanner类输出平均值和排序方法

几个小时后，我在制作输出平均值的方法方面没有取得进展。我还需要做一个排序类。总的来说，任务需要。

开发方法：

• 'main'方法打印数组
• 对数组进行排序
• 确定最高值
• 确定最低值
• 计算平均值（双倍）

---

import java.util.Scanner;
public class Arrayassignment {
public static void main(String[] args) {
   Scanner sin=new Scanner(System.in);
System.out.println("Enter an intiger for array size.");
int number= sin.nextInt();
int array[]=new int[number];
System.out.println("Array size " + number + " initiated.n");

System.out.println("Now enter the array intigers");
for (int i = 0; i < number; i++)
{  
    array[i]=sin.nextInt();
 }
System.out.println ("The highest number in the array is " + max (array) );
System.out.println ("The smallest number in the array is " + min (array) );
//System.out.println ("The average of the numbers in the array is " ;
}
public static int max ( int ... arg )
{
 if ( arg.length == 0) 
 { 
   System.out.println(" empty arguement list ")  ;
   return 0;
 }
 int largest = arg [0];
 for (int i = 1; i < arg.length; i++ )
 {
   if (arg [i] > largest)
       largest = arg[i];
 }
 return largest;
 }
 public static int min ( int ... arg )
 {
 if ( arg.length == 0) 
 { 
   System.out.println(" empty arguement list ")  ;
   return 0;
 }
 int smallest = arg [0];
 for (int i = 1; i < arg.length; i++ )
 {
   if (arg [i] < smallest)
       smallest = arg[i];
 }
 return smallest;

int sum = 0;
for (int d : arg ) sum += d;
double average = 1.0d * sum / arg .length;

int[] arr = { 3, 1, 2 };
IntSummaryStatistics stats = IntStream.of(arr).summaryStatistics();
System.out.printf("Min: %d, Max: %d, Average: %.2f%n", //
        stats.getMin(), stats.getMax(), stats.getAverage());
IntStream.of(arr).sorted().forEach(System.out::println);

int sum = 0;
double avg = 0;
for (int i=0;i<array.length; i++){
   sum+=array[i];
}
avg = sum/array.length;