乘法字符串

Question

說我想要做一些「塔」是這個樣子：

********* 
********* 
********* ******* 
********* ******* 
********* ******* *************** 
********* ******* *************** 
********* ******* *************** 
********* ******* *************** 
********* ******* *************** 
********* ******* *************** 
********* ******* *************** 

如果我要求用戶輸入三個不同的號碼爲塔的寬度和隨機整數將彌補長度，我怎麼能做一個循環，乘以「*」乘以用戶輸入的寬度數？這是我到目前爲止：

 for(int i = 0; i < randInt1; i++){ 

      // I would like to do something like 
      // System.out.print("*") * width1 
      // and do this for all three towers so that they 
      // print next to each other separated by a space 
     } 

Answer 1

用下面的代碼塊替換for循環應該可以工作。

int highest = Math.max(randInt1, Math.max(randInt2, randInt3)); 
for(int i = highest; i > 0; i--){ 
    printColumn(width1, randInt1, i); 
    System.out.print(" "); 

    printColumn(width2, randInt2, i); 
    System.out.print(" "); 

    printColumn(width3, randInt3, i); 
    System.out.println(); 
} 

並增加一個輔助方法

private static void printColumn(int columnWidth, int columnHeight, int currentHeight) { 
    for(int j = columnWidth;j > 0;j--) { 
     if(columnHeight - currentHeight >= 0) { 
      System.out.print("*"); 
     } else { 
      System.out.print(" "); 
     } 
    } 
} 

你不能夠 「乘」， 「*」 S。您可能需要逐行打印您的塔，並使用空間來對齊每一列。

Answer 2

另一種解決方案將連接每個星的每個星或每個塔的空白。請注意0​​，它會在相關塔的寬度處返回一個字符串！

public static void main(String[] args) { 

    // hardcoded settings (example) 
    // in your case you'll read it from the user 
    Integer[] widths = {5, 4, 6}; 
    Integer[] heights = {5, 4, 6}; 

    // subtract max-1 from the heights 
    int max = Collections.max(Arrays.asList(heights)) - 1; 
    for (int i=0; i<heights.length; i++) 
     heights[i] -= max; 


    // print the towers 
    for (int i=0; i<max; i++){ 
     String line = ""; 
     for (int j=0; j<widths.length; j++) { 
      if (heights[j] > 0) 
       line += generateString("*", widths[j]) + " "; 
      else 
       line += generateString(" ", widths[j]) + " "; 
      heights[j] += 1; 
     } 
     System.out.println(line); 
    } 
} 

private static String generateString(String str, int times) { 
    return String.format("%1$" + times + "s", str).replace(" ", str); 
}