java - 如何创建正则表达式以删除字符串开头的所有 `"0"`？

Question

如何删除字符串开头的所有"0"？

00011 -> 11
00123 -> 123
000101 -> 101
101 -> 101
000002500 -> 2500

我试过:

            Pattern pattern = Pattern.compile("([1-9]{1}[0-9]?+)");
            Matcher matcher = pattern.matcher("00049");
            matcher.matches();
            whatYouNeed = matcher.group();

我有错误:找不到匹配项

Answer 1

我会试试

System.out.println("Status: " + "00012010003".replaceAll("^0+", ""));   

或仅正则表达式:

yourString.replaceAll("^0+", "");

在哪里

^ - matches only at start of string
0 - matches literal zeroes
+ - matches consecutive zeroes (at least one)