java - 将空格移到字符串的前面？

Question

我们如何使用 Java 将 String 的所有空格移动到前面？

Input string  = "move these spaces to beginning"

Output string = "    movethesespacestobeginning"

Answer 1

试试这个:

String input = "move these spaces to beginning";
int count = input.length() - input.replace(" ", "").length();
String output = input.replace(" ", "");
for (int i=0; i<count; i++) output = " " + output;
System.out.print(output);