如何使用数组的输出，然后在 Java 中将其所有数字相加？

Question

我希望代码从数组中获取数据，然后显示其中的数字之和，但我碰壁了。

public class StringBuffer{
public static void main(String[] args) {
  countTo_N_Improved();
}
   private final static int MAX_LENGTH=30;
   private static String buffer = "";
   private static void emit(String nextChunk) {
        if(buffer.length() + nextChunk.length() > MAX_LENGTH) {
        System.out.println(buffer);
        buffer = "";  
   }
   buffer += nextChunk;
 }
  private static final int N=100;
  private static void countTo_N_Improved() {
  for (int count=2; count<=N; count=count+2) {
     emit(" " + count);
     }
  }
}

这是输出

 2 4 6 8 10 12 14 16 18 20 22
24 26 28 30 32 34 36 38 40 42
44 46 48 50 52 54 56 58 60 62
64 66 68 70 72 74 76 78 80 82

我希望输出变成这样

 2 4 6 8 10 12 14 16 18 20 22
24 26 28 30 32 34 36 38 40 42
44 46 48 50 52 54 56 58 60 62
64 66 68 70 72 74 76 78 80 82

And the sum of the number from the array is 1722

非常感谢。

Answer 1

希望这个回答对你有帮助

public class StringBuffer{
int sum = 0;
public static void main(String[] args) {
  countTo_N_Improved();
}
   private final static int MAX_LENGTH=30;
   private static String buffer = "";
   private static void emit(String nextChunk, int count) {
        if(buffer.length() + nextChunk.length() > MAX_LENGTH) {
        sum += count;
        System.out.println(buffer);
        buffer = "";  
   }
   buffer += nextChunk;
 }
  private static final int N=100;
  private static void countTo_N_Improved() {

  for (int count=2; count<=N; count=count+2) {
     emit((" " + count),count);
     }
  }
  System.out.println("And the sum of the number from the array is "+sum);
}