Created
November 29, 2018 15:47
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Adds format index specifiers to format strings that don't have them
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| import java.util.regex.Matcher; | |
| import java.util.regex.Pattern; | |
| //helper class that adds format index specifiers to plain specifiers in format strings | |
| public class FormatStringIndexer { | |
| private static Pattern pattern = Pattern.compile("%[-#+\\s0,(]?\\d*(\\.\\d)?[bBhHsScCdDoxXeEfgGaAtT%n]"); | |
| public static String index(final String formatString, int start) { | |
| final Matcher matcher = pattern.matcher(formatString); | |
| final StringBuffer sb = new StringBuffer(); | |
| while (matcher.find()) { | |
| String replacement = "%" + start++ + "\\$" + matcher.group().substring(1); | |
| matcher.appendReplacement(sb, replacement); | |
| } | |
| matcher.appendTail(sb); | |
| return sb.toString(); | |
| } | |
| } |
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