【JAVA】杨辉三角

ソース

 public Yanghui3jiao() {
     List<String[]> rowList = new ArrayList<String[]>();
     List<String[]> newList = new ArrayList<String[]>();
     for (int i = 22; i > 0; i--) {
         String str[] = new String[i];
         for (int j = 0; j < str.length; j++) {
             if (j == 0 || j == str.length - 1) {
                 str[j] = "1";
             } else {
                 str[j] = "0";
             }
         }
         rowList.add(str);
     }

     String tmp[] = null;

     for (int i = rowList.size() - 1; i > 0; i--) {
         String str[] = rowList.get(i);
         if (tmp != null) {
             for (int x = 1; x < str.length - 1; x++) {
                 str[x] = String.valueOf((Integer.valueOf(tmp[x - 1]) + Integer.valueOf(tmp[x])));
             }
         }
         newList.add(str);

         for (int o = 1; o < (rowList.size() - str.length); o++) {
             System.out.print(" ");
         }

         for (int j = 0; j < str.length; j++) {
             System.out.print(str[j] + " ");
         }
         System.out.println("");
         if (str.length != 1) {
             tmp = str;
         }
     }
 }