在字符串金字塔的java计数器 [英] java counter in string pyramid

问题描述

我试图用一个字符串创建一个倒金字塔。循环从每一端减去一个字符。只有它的右边被减去。我怎样才能把它做到左侧？我怎样才能让它打印正确的每一行的长度？

  int x = 0; 
 
 int space =''; 
 
 space = space +''; 
 
 int counter = fullName.length（）; （x = 0; x  {
 
 System.out.println（counter  -  x + [+ fullName.substring（x，fullName.length（） -  x）+]）; 
 
 $ b $ / code $ <$ $ p 
 
解决方案
  String＃substring 不会替代 String 变量的内部数据。记住一个 String 实例是不可变的。
 
 
 
你应该打印一个打印 fullName 以添加空格：
 
 
 <$ c （x = 0; x  System.out.println（spaces + fullName.substring（x， fullName.length（） -  X））; 
 spaces = spaces +; 
} 
  
 
I'm trying to create an inverted pyramid with a string. The loop subtracts a character from each end. Only the right side of it is being subtracted. How do I get it to do the same for the left side? How can I also get it to print the length of each line correctly? 
     int x = 0;

     int space = ' ';

     space = space + ' ';  

     int counter = fullName.length();

     for( x = 0; x < fullName.length()/2; x++ )
     {

         System.out.println( counter - x + " [" + fullName.substring( x, fullName.length() - x ) + "]" );

     }  

解决方案
String#substring does not replace the inner data of the String variable. Remember that a String instance is immutable.

You should print a String spaces variable before printing the fullName in order to add whitespaces:
String spaces = ""
for( x = 0; x < fullName.length()/2; x++ ) {
    System.out.println(spaces + fullName.substring(x, fullName.length()-x));
    spaces = spaces + " ";
}


                        
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