字符之间添加空格??public class Test {public static void main(String[] args) { System.out.println(1
字符之间添加空格
?
?
public class Test {public static void main(String[] args) { System.out.println("123456789012345".replaceAll("\\d{1}(?!$)", "$0 "));}}?
输出：
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5