57 lines
2.0 KiB
Java
57 lines
2.0 KiB
Java
// strings/TheReplacements.java
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// (c)2017 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import java.util.regex.*;
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import java.nio.file.*;
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import java.util.stream.*;
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/*! Here's a block of text to use as input to
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the regular expression matcher. Note that we
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first extract the block of text by looking for
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the special delimiters, then process the
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extracted block. !*/
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public class TheReplacements {
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public static void
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main(String[] args) throws Exception {
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String s = Files.lines(
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Paths.get("TheReplacements.java"))
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.collect(Collectors.joining("\n"));
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// Match the specially commented block of text above:
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Matcher mInput = Pattern.compile(
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"/\\*!(.*)!\\*/", Pattern.DOTALL).matcher(s);
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if(mInput.find())
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s = mInput.group(1); // Captured by parentheses
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// Replace two or more spaces with a single space:
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s = s.replaceAll(" {2,}", " ");
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// Replace one or more spaces at the beginning of each
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// line with no spaces. Must enable MULTILINE mode:
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s = s.replaceAll("(?m)^ +", "");
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System.out.println(s);
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s = s.replaceFirst("[aeiou]", "(VOWEL1)");
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StringBuffer sbuf = new StringBuffer();
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Pattern p = Pattern.compile("[aeiou]");
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Matcher m = p.matcher(s);
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// Process the find information as you
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// perform the replacements:
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while(m.find())
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m.appendReplacement(sbuf, m.group().toUpperCase());
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// Put in the remainder of the text:
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m.appendTail(sbuf);
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System.out.println(sbuf);
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}
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}
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/* Output:
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Here's a block of text to use as input to
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the regular expression matcher. Note that we
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first extract the block of text by looking for
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the special delimiters, then process the
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extracted block.
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H(VOWEL1)rE's A blOck Of tExt tO UsE As InpUt tO
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thE rEgUlAr ExprEssIOn mAtchEr. NOtE thAt wE
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fIrst ExtrAct thE blOck Of tExt by lOOkIng fOr
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thE spEcIAl dElImItErs, thEn prOcEss thE
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ExtrActEd blOck.
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*/
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