java - 用字符打印金字塔图案

Question

我需要打印一个金字塔形状的字符数组。我到目前为止是这样的:

char[] chars = {'F', 'E', 'L', 'I', 'Z', ' ', 'A', 'N','I', 'V', 'E', 'R', 'S', 'A', 'R', 'I', 'O'};
    int length = chars.length;


  for (int i = 1; i < length; i += 2) {
  for (int j = 0; j < 9 - i / 2; j++)
    System.out.print(" ");

  for (int j = 0; j < i; j++)
    System.out.print(chars[j]);

  System.out.print("\n");
}
  for (int i = length; i > 0; i -= 2) {
  for (int j = 0; j < 9 - i / 2; j++)
    System.out.print(" ");

  for (int j = 0; j < i; j++)
    System.out.print(chars[j]);

  System.out.print("\n");

它打印出这个:

           F
          FEL
         FELIZ
        FELIZ A
       FELIZ ANI
      FELIZ ANIVE
     FELIZ ANIVERS
    FELIZ ANIVERSAR
   FELIZ ANIVERSARIO
    FELIZ ANIVERSAR
     FELIZ ANIVERS
      FELIZ ANIVE
       FELIZ ANI
        FELIZ A
         FELIZ
          FEL
           F

但我需要它从数组中间的字符开始打印。最终结果应该是这样的:

                       I
                      NIV
                     ANIVE
                    ANIVER
                   Z ANIVERS
                  IZ ANIVERSA
                 LIZ ANIVERSAR
                ELIZ ANIVERSARI
               FELIZ ANIVERSARIO
                ELIZ ANIVERSARI
                 LIZ ANIVERSAR
                  IZ ANIVERSA
                   Z ANIVERS
                    ANIVER
                     ANIVE
                      NIV
                       I

如有任何帮助，我们将不胜感激。

Answer 1

您可以执行与以下代码相同的操作。它将使用较少数量的 for 循环。我在代码中添加了内嵌注释。

    char[] chars = { 'F', 'E', 'L', 'I', 'Z', ' ', 'A', 'N', 'I', 'V', 'E', 'R', 'S', 'A', 'R', 'I', 'O' };
    int length = chars.length;


    for (int line=0;line<=length;line++) {
        //This will print upper part of pyramid
        if(line < length/2){
            String output="";
            int middelVal=length/2;
            for (int i = middelVal - line; i > 0; i--) {
                output=output+" ";
            }
            for (int i = middelVal - line; i <= middelVal + line; i++) {
                output=output+chars[i];
            }
            System.out.println(output);
        }else if(line > length/2){
            //This will print lower part of pyramid
            String output="";
            int middelVal=length/2;
            int nwNum = chars.length-line;
            for (int i = middelVal - nwNum; i > 0; i--) {
                output=output+" ";
            }
            for (int i = middelVal - nwNum; i <= middelVal + nwNum; i++) {
                output=output+chars[i];
            }
            System.out.println(output);
        }
    }