Examples of org.apache.commons.lang.text.StrBuilder

org.apache.commons.lang.text.StrBuilder
Builds a string from constituent parts providing a more flexible and powerful API than StringBuffer.
The main differences from StringBuffer/StringBuilder are:
- Not synchronized
- Not final
- Subclasses have direct access to character array
- Additional methods
  - appendWithSeparators - adds an array of values, with a separator
  - appendPadding - adds a length padding characters
  - appendFixedLength - adds a fixed width field to the builder
  - toCharArray/getChars - simpler ways to get a range of the character array
  - delete - delete char or string
  - replace - search and replace for a char or string
  - leftString/rightString/midString - substring without exceptions
  - contains - whether the builder contains a char or string
  - size/clear/isEmpty - collections style API methods
Views
- asTokenizer - uses the internal buffer as the source of a StrTokenizer
- asReader - uses the internal buffer as the source of a Reader
- asWriter - allows a Writer to write directly to the internal buffer

The aim has been to provide an API that mimics very closely what StringBuffer provides, but with additional methods. It should be noted that some edge cases, with invalid indices or null input, have been altered - see individual methods. The biggest of these changes is that by default, null will not output the text 'null'. This can be controlled by a property, {@link #setNullText(String)}.

Prior to 3.0, this class implemented Cloneable but did not implement the clone method so could not be used. From 3.0 onwards it no longer implements the interface. @author Apache Software Foundation @since 2.2 @version $Id: StrBuilder.java 1057349 2011-01-10 20:40:49Z niallp $

     * is negative, then it is enclosed in parentheses.</p>
     *
     * @return the string representation of this range
     */
    public String toString() {
        StrBuilder sb = new StrBuilder();


        if (min.doubleValue() < 0) {
            sb.append('(')
                .append(min)
                .append(')');
        } else {
            sb.append(min);
        }


        sb.append('-');


        if (max.doubleValue() < 0) {
            sb.append('(')
                .append(max)
                .append(')');
        } else {
            sb.append(max);
        }


        return sb.toString();
    }

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     * @throws IndexOutOfBoundsException if either position is invalid
     * @deprecated Use better named {@link #overlay(String, String, int, int)} instead.
     *             Method will be removed in Commons Lang 3.0.
     */
    public static String overlayString(String text, String overlay, int start, int end) {
        return new StrBuilder(start + overlay.length() + text.length() - end + 1)
            .append(text.substring(0, start))
            .append(overlay)
            .append(text.substring(end))
            .toString();
    }

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        if (start > end) {
            int temp = start;
            start = end;
            end = temp;
        }
        return new StrBuilder(len + start - end + overlay.length() + 1)
            .append(str.substring(0, start))
            .append(overlay)
            .append(str.substring(end))
            .toString();
    }

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                    output2[i] = ch0;
                    output2[i + 1] = ch1;
                }
                return new String(output2);
            default :
                StrBuilder buf = new StrBuilder(outputLength);
                for (int i = 0; i < repeat; i++) {
                    buf.append(str);
                }
                return buf.toString();
        }
    }

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    public static String capitalize(String str) {
        int strLen;
        if (str == null || (strLen = str.length()) == 0) {
            return str;
        }
        return new StrBuilder(strLen)
            .append(Character.toTitleCase(str.charAt(0)))
            .append(str.substring(1))
            .toString();
    }

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    public static String uncapitalize(String str) {
        int strLen;
        if (str == null || (strLen = str.length()) == 0) {
            return str;
        }
        return new StrBuilder(strLen)
            .append(Character.toLowerCase(str.charAt(0)))
            .append(str.substring(1))
            .toString();
    }

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    public static String swapCase(String str) {
        int strLen;
        if (str == null || (strLen = str.length()) == 0) {
            return str;
        }
        StrBuilder buffer = new StrBuilder(strLen);


        char ch = 0;
        for (int i = 0; i < strLen; i++) {
            ch = str.charAt(i);
            if (Character.isUpperCase(ch)) {
                ch = Character.toLowerCase(ch);
            } else if (Character.isTitleCase(ch)) {
                ch = Character.toLowerCase(ch);
            } else if (Character.isLowerCase(ch)) {
                ch = Character.toUpperCase(ch);
            }
            buffer.append(ch);
        }
        return buffer.toString();
    }

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     */
    public static String reverse(String str) {
        if (str == null) {
            return null;
        }
        return new StrBuilder(str).reverse().toString();
    }

View Full Code Here


        int targetSting = length-middle.length();
        int startOffset = targetSting/2+targetSting%2;
        int endOffset = str.length()-targetSting/2;
        
        StrBuilder builder = new StrBuilder(length);
        builder.append(str.substring(0,startOffset));
        builder.append(middle);
        builder.append(str.substring(endOffset));
        
        return builder.toString();
    }

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    public static String normalizeSpace(String str) {
        str = strip(str);
        if(str == null || str.length() <= 2) {
            return str;
        }
        StrBuilder b = new StrBuilder(str.length());
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (Character.isWhitespace(c)) {
                if (i > 0 && !Character.isWhitespace(str.charAt(i - 1))) {
                    b.append(' ');
                }
            } else {
                b.append(c);
            }
        }
        return b.toString();
    }

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