使用正则表达式而不是 String.split 拆分以逗号分隔的字符串

Question

Is there any way I can split this string using the Pattern and Matcher classes in Java using regex instead of using String.split() ?

o_9,o_8,x_7,o_6,o_5

I have tried doing it with "\\\\w" but it just returned one group in m.group() which is o . It should have matched everything except the commas. Could someone help me with this string split?

Answer 1

Take a look at this:

String str = "o_9,o_8,x_7,o_6,o_5";
String[] getstr = str.split(',');
String str1 = getstr[0];
String str2 = getstr[1];
String str3 = getstr[2];
String str4 = getstr[3];
String str5 = getstr[4];

Answer 2

I'm not sure where you've gone wrong, but in your reply to AlanMoore's helpful suggestion you said you could only match the first word. The code below shows that it matches all the words:

    String s = "o_9,o_8,x_7,o_6,o_5";
    Pattern p = Pattern.compile("\\w+");
    Matcher m = p.matcher(s);
    while (m.find()) {
        String matchedWord = m.group();
        System.out.println("Matched \"" + matchedWord + "\".");
    }

Output:

Matched "o_9".
Matched "o_8".
Matched "x_7".
Matched "o_6".
Matched "o_5".

For performance, the Pattern should be compiled once - preferably as a private static final near the top of your class. Avoid creating an array of strings (as String.split() does) unless you really need to.