如何删除字符串中重复的空格并计算Java中已删除的空格数？

Question

This forum has a solution for removing duplicated white spaces in java using

String.replaceAll() 

However this solution can't be applied if we need to count the removed white spaces. Is there any other way to solve this problem?

Answer 1

您之前replaceAll()你可以遍历所有的字符stringVar.toCharArray()和计数。

Answer 2

Why not?

 String s = "     ";
 String whiteSpaceLess = s.replaceAll("  ", "");
 int diff = s.length() - whiteSpaceLess.length();

Answer 3

Simply retain the original string in another variable. After trimming it from extra spaces, just calculate the length difference: this is the number of spaces removed.

Answer 4

If you have a String s,

String t = s.replaceAll("\\s+", " ");
System.out.println(t);
int count = s.length() - t.length();
System.out.println(count);

You can remove the whitespaces using replaceAll, and count the difference in length between the strings to get the number of removed spaces.