为什么这个代码块没有运行？

I am making a diamond using ASCII art. Yes, I know the code is beyond sloppy. Anyways, the last part is not running inside of an else block, leaving the diamond not finished. Full code: http://pastebin.com/14HnZADe

我正在使用ASCII艺术制作钻石。是的,我知道代码超出了草率。无论如何,最后一部分没有在一个else块内运行,留下钻石未完成。完整代码:http://pastebin.com/14HnZADe

Current output:

http://pastebin.com/YTqKrRQe

The for loop:

for循环:

 for(int i = 1; i<=size; i++) {
     for(int j=1; j<=size; j++) {
         if(j<i) {
             System.out.print(" ");
         }
         else if(j==i || j>i) {
             System.out.print("*");
         } else {//this block is not executing, and I do not know why.
             for(int ki = 1; ki<=size; ki++) { // how do I fix it?
                 for(int n = size; n>=1; n--) {
                     if(j>=i) {
                         System.out.print("*");
                     } else {
                         System.out.print(" ");
                     }
                 }
             System.out.println();
             }
         }
     }
     System.out.println();
 }

2 个解决方案

#1

One of your conditions has to be met before it gets to the else block:

在到达else块之前,必须满足您的一个条件:

if(j<i) {
    System.out.print(" ");
}
else if(j==i || j>i) {

j is either less than i or greater than i or equal to i. You have specified all possible conditions therefore the else will never execute...

j小于i或大于i或等于i。您已指定所有可能的条件,因此else将永远不会执行...

#2

You have

if (j<i) {
    //..
} else if (j==i || j>i) {
    // ..
} else {
    // this will never happen
}

But j==i || j>i is the same as j>=i. The else block will never execute because j will always be either smaller than i or greater than or equal to i. There are no other options!

但是j == i || j> i与j> = i相同。 else块永远不会执行,因为j总是小于i或大于或等于i。没有其他选择!

#1