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1
4 package com.tc.text;
5
6 import java.util.Arrays  ;
7 import java.util.Iterator ;
8 import java.util.List ;
9
10 public class ConsoleParagraphFormatter implements ParagraphFormatter {
11
12 private final StringFormatter sf;
13 private final int maxWidth;
14
15 public ConsoleParagraphFormatter(int maxWidth, StringFormatter stringFormatter) {
16 this.maxWidth = maxWidth;
17 this.sf = stringFormatter;
18 }
19
20 public String format(String in) {
21 StringBuffer buf = new StringBuffer ();
22 if (in == null) throw new AssertionError ();
23 List words = parseWords(in);
24 int lineWidth = 0;
25 for (Iterator i = words.iterator(); i.hasNext();) {
26 String currentWord = (String ) i.next();
27 if (lineWidth + currentWord.length() > maxWidth) {
28 if (lineWidth > 0) {
29 buf.append(sf.newline());
30 }
31 lineWidth = currentWord.length();
32 } else {
33 if (lineWidth > 0) {
34 buf.append(" ");
35 }
36 lineWidth += currentWord.length();
37 }
38 buf.append(currentWord);
39 }
40 return buf.toString();
41 }
42
43 private List parseWords(String in) {
44 String [] words = in.split("\\s+");
45 return Arrays.asList(words);
46 }
47
48 }
49
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Java API By Example, From Geeks To Geeks.