Java String Normalize normalizeWhiteSpace(String str)

Description

normalize White Space

License

Open Source License

Declaration

public static String normalizeWhiteSpace(String str) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.text.Normalizer;

public class Main {
    public static final String SPACE = " ";

    public static String normalizeWhiteSpace(String str) {
        if (str == null) {
            return null;
        }//from  w ww.jav a  2  s . c  om

        String normalized = Normalizer.normalize(str, java.text.Normalizer.Form.NFD);
        int len = normalized.length();
        StringBuffer sb = new StringBuffer();

        int spaceCount = 0;

        for (int i = 0; i < len;) {
            int codePoint = normalized.codePointAt(i);
            boolean whitespace = Character.isWhitespace(codePoint);
            boolean space = Character.isSpaceChar(codePoint);
            int offset = Character.charCount(codePoint);

            i += offset;
            if (space || whitespace) {
                spaceCount++;
                if (spaceCount == 1) {
                    sb.append(SPACE);
                }
            } else {
                spaceCount = 0;
                char[] chars = Character.toChars(codePoint);
                sb.append(chars);
            }
        }

        String result = sb.toString().trim();
        return Normalizer.normalize(result, java.text.Normalizer.Form.NFC);
    }

    public static String trim(String str) {
        return str == null ? null : str.trim();
    }
}

Related

1. normalizeUnicode(final String str)
2. normalizeUnicode(String input)
3. normalizeUnicode(String str)
4. normalizeUnicodeDiacritics(String text)
5. normalizeWhitespace(final String str)
6. normalizeWidth(String text)
7. normalizeWord(String word)