Question

例如，我有这个字符串：

0no1no2yes3yes4yes

此处的第一个0应该被删除并使用一个数组索引。我是这样说的：

string = string.replaceFirst(dataLine.substring(0, 1), "");

然而，当我说出这个字符串时：

10yes11no12yes13yes14no

我的代码失败，因为我想处理10，但我的代码只提取1。

因此，在排序中，单个数字可以正常工作，但是双位或三位数会导致IndexOutOfBound错误。

以下是代码：http://pastebin.com/uspYp1FK

以下是一些示例数据：http://pastebin.com/kTQx5WrJ

以下是样本数据的输出：

Enter filename: test.txt
Data before cleanUp: {"assignmentID":"2CCYEPLSP75KTVG8PTFALQES19DXRA","workerID":"AGMJL8K9OMU64","start":1359575990087,"end":"","elapsedTime":"","itemIndex":0,"responses":[{"jokeIndex":0,"response":"no"},{"jokeIndex":1,"response":"no"},{"jokeIndex":2,"response":"yes"},{"jokeIndex":3,"response":"yes"},{"jokeIndex":4,"response":"yes"}],"mturk":"yes"},
Data after cleanUp: 0no1no2yes3yes4yes
Data before cleanUp: {"assignmentID":"2118D8J3VE7W013Z4273QCKAGJOYID","workerID":"A2P0GYVEKGM8HF","start":1359576154789,"end":"","elapsedTime":"","itemIndex":3,"responses":[{"jokeIndex":15,"response":"no"},{"jokeIndex":16,"response":"no"},{"jokeIndex":17,"response":"no"},{"jokeIndex":18,"response":"no"},{"jokeIndex":19,"response":"no"}],"mturk":"yes"},
Data after cleanUp: 15no16no17no18no19no
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 2
    at java.lang.String.substring(String.java:1907)
    at jokes.main(jokes.java:34)

基本上，代码应该做的是将数据剥离成如上所示的字符串，然后读取数字，如果后跟yes，则在dataYes中增加它的索引值，或者no之后dataNo增加值。有意义吗？

我该怎么办？如何使我的代码更灵活？

Answer 1

它对你有用吗？

string = string.replaceAll("^\\d+","");

Answer 2

怎么样： -

String regex = "^\\d+";
String myStr = "10abc11def";

Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(myStr);

if(m.find())
{
    String digits = m.group();
    myStr = m.replaceFirst("");
}

Answer 3

试试这个

    System.out.println("10yes11no12yes13yes14no".replaceFirst("^\\d+",""));

Answer 4

另一种更具体的尝试： -

    String regex = "^(\\d+)(yes|no)";
    String myStr = "10yes11no";

    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(myStr);

    while (m.find())
    {
        String all = m.group();
        String digits = m.group(1);
        String bool = m.group(2);

        // do not try and combine the next 2 lines ... it doesn't work!
        myStr = myStr.substring(all.length());
        m.reset(myStr);

        System.out.println(String.format("all = %s, digits = %s, bool = %s", all, digits, bool));
    }

如何从字符串中读取和删除数字？

4 个答案: