只打印用戶輸入的數字，嚴格小於平均值

Question

因此，現在計算平均值，我試圖打印出用戶輸入，它只在自己的行中嚴格小於平均值。我試着這樣做，但是，進入一個錯誤的 「壞的操作數爲二進制運算符」 <「

import java.util.Scanner; 
    public class avg 
    { 
     public static void main (String args[]) 
     { 
      Scanner in = new Scanner(System.in); 
      System.out.println("Enter some numbers(Ctrl-d to quit):"); 
      double[] myArray = new double[10]; 
      int howMany = 0; 
      double sum=0 ; 
      double avg=0; 
      while (in.hasNextDouble()) // Ctrl-D to terminate 
      { 
       double userVal = in.nextDouble(); 
       myArray[howMany++] = userVal; 

       if (howMany >= myArray.length) 
       { 
        //myArray.length = myArray.length * 2; 
        double[] tempArray = new double[2 * myArray.length]; 

        for (int i = 0; i < howMany; i++) 
         tempArray[i] = myArray[i]; 
        myArray = tempArray;   
       } 
      } 
      for (int i = howMany - 1; i >= 0; i--) 
      { 
      sum += myArray[i]; 
      } 
      avg = sum/howMany; 
      System.out.print("Average: "+ avg); 
      System.out.println(myArray<avg);// to print numbers that the user entered only which are strictly less than the avg. This did not work// 

    } 
} 

Answer 1

for (int i = howMany - 1; i >= 0; i--){ 
    sum+=myArray[i];//sum up the array 
} 
avg = sum/howMany; 

打印每double在一行：

System.out.println(avg); 

for (int i = 0; i < howMany; i++) { 
    if(myArray[i] < avg){ 
     System.out.println(myArray[i]);//single line for every double 
    } 
} 

打印所有double S IN一個行：

String oneLine = "["; 
int lowerAvg = 0; 
for (int i = 0; i < howMany; i++) { 
if(myArray[i] < avg){ 
     oneLine += (i > 0 && ++lowerAvg > 0)?", ":""; // add separator 
     oneLine += (myArray[i]); 
    } 
} 
oneLine+="]"; 
System.out.println(oneLine);//prints like [1.0, 2.0, ...] 

使用Java 8：

avg = Arrays.stream(myArray, 0, howMany).average().orElse(0); 
final double finalAvg = avg;//final variable to use in filter condition 
System.out.println(finalAvg); 
Arrays.stream(myArray, 0, howMany).filter(x -> x < finalAvg).forEach(System.out::println);//will print every double in a single line 
System.out.println(Arrays.toString(Arrays.stream(myArray, 0, howMany).filter(x -> x < finalAvg).toArray()));//Will print the array like [1.0, 2.0, ...]