unble to replace string

This is my replace method in java but unble to replace for following.

It replace only one \

Please help. If any body have any different method for replace?

I had tried java s开发者_C百科tandard API but that is not working can please try following senario --> System.out.println(replace("this%s is the problem" , "%" , "\%"));

public static String replace(String str, String sub, String rep) {
        int s, p, q;
        int slen = sub.length();
        StringBuffer sb = new StringBuffer();

        s = 0;
        p = str.indexOf(sub);
        q = p + slen;
        while (p != -1) {
            sb.append(str.substring(s, p));
            sb.append(rep);
            s = q;
            p = str.indexOf(sub, s);
            if (p != -1) {
                q = p + slen;
            }
        }
        sb.append(str.substring(s));
        return sb.toString();
    }

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You can use the replaceAll method. You just need to be careful escaping the \ and % (although I don't fully understand why you need four '\'s)!

String myString = "this%s is the problem";
myString = myString.replaceAll("%","\\\\%);

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Escaping escape signs is a bit tedious in Java, but this should do what you want (if you want \\%):

System.out.println("this%s is the problem".replace("%" , "\\\\%"));

If you want \% it's this:

System.out.println("this%s is the problem".replace("%" , "\\%"));

Also note that this won't work properly with replaceAll, which takes regexes, other than replace.

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There is a replaceAll() method

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Why don't you use org.apache.commons.lang.StringUtils#replace(String, String, String)