编辑代码

 public class ArrayOK{
    public static void main(String[] args){
        int[] arr = {50,70,80,98,90,80,70,78};
        int max = arr[0];
        int min = arr[0];
        int sum = arr[0];
        for(int i=1; i<arr.length; i++) 
            if(max<arr[i])
                max = arr[i];  
        for(int i=1; i<arr.length; i++)                            
            if(min>arr[i])
                min = arr[i];
        for(int i=1; i<arr.length; i++)
                sum += arr[i];
        double avg=sum/8.0;
		System.out.println("数组最大值："+max);
		System.out.println("数组最小值："+min);
        System.out.println("数组平均值："+avg);
        System.out.println("50.hjy");
    }
}