Example usage for java.lang StringBuilder length

Introduction

In this page you can find the example usage for java.lang StringBuilder length.

Prototype

int length();

Source Link

Document

Returns the length of this character sequence.

Usage

From source file:Main.java

/**
 * Trim <i>all</i> whitespace from the given String:
 * leading, trailing, and in between characters.
 * @param str the String to check//from   w w  w.  j a va2  s.  co  m
 * @return the trimmed String
 * @see java.lang.Character#isWhitespace
 */
public static String trimAllWhitespace(String str) {
    if (!hasLength(str)) {
        return str;
    }
    StringBuilder sb = new StringBuilder(str);
    int index = 0;
    while (sb.length() > index) {
        if (Character.isWhitespace(sb.charAt(index))) {
            sb.deleteCharAt(index);
        } else {
            index++;
        }
    }
    return sb.toString();
}

From source file:StringHelper.java

/**
 * Left pad the given text parameter/*from w  ww.  j ava 2 s  . c  o m*/
 * 
 * <pre>
 * <b>Assertions:</b>
 *    assertNull(StringHelper.leftPad(null, 10, '*'));
 *    assertEquals("", StringHelper.leftPad("", 0, '*'));
 *    assertEquals("*", StringHelper.leftPad("", 1, '*'));
 *    assertEquals("*****", StringHelper.leftPad("", 5, '*'));
 *    assertEquals("*****Hello", StringHelper.leftPad("Hello", 10, '*'));
 *    assertEquals("*****", StringHelper.leftPad("*****", 0, '*'));
 *    assertEquals("*****", StringHelper.leftPad("*****", 1, '*'));
 *    assertEquals("*****", StringHelper.leftPad("*****", 3, '*'));
 * </pre>
 * 
 * @param text
 * @param size
 * @param padChar
 * @return Left pad of the given text parameter
 */
public static String leftPad(final String text, final int size, final char padChar) {
    if (text == null) {
        return null;
    }

    final StringBuilder paddedText = new StringBuilder(size);
    while (paddedText.length() < size - text.length()) {
        paddedText.append(padChar);
    }

    paddedText.append(text);

    return paddedText.toString();
}

From source file:Main.java

public static String joins(String[] arrays, String joinStr) {
    if (arrays == null) {
        return "";
    }/*ww  w .j  a v  a  2  s. c om*/
    joinStr = StringUtils.hasText(joinStr) ? joinStr : ",";
    StringBuilder rs = new StringBuilder();
    for (String e : arrays) {
        rs.append(joinStr).append(e);
    }
    return rs.length() > 0 ? rs.substring(1) : "";
}

From source file:Main.java

/**
 * Format size in string form/*from  ww w  . ja va  2  s  .c  o  m*/
 *
 * @param size Size in bytes
 * @return Size in stinrg format with suffix
 */
public static String formatSize(int size) {
    String suffix = null;

    if (size >= 1024) {
        suffix = "KB";
        size /= 1024;
        if (size >= 1024) {
            suffix = "MB";
            size /= 1024;
        }
    }

    StringBuilder resultBuffer = new StringBuilder(Long.toString(size));

    int commaOffset = resultBuffer.length() - 3;
    while (commaOffset > 0) {
        resultBuffer.insert(commaOffset, ',');
        commaOffset -= 3;
    }

    if (suffix != null)
        resultBuffer.append(suffix);
    return resultBuffer.toString();
}

From source file:Main.java

public static String showByteArray(byte[] data) {
    if (null == data) {
        return null;
    }/*  w  ww. j ava2s.  co m*/
    StringBuilder sb = new StringBuilder("{");
    for (byte b : data) {
        sb.append(b).append(",");
    }
    sb.deleteCharAt(sb.length() - 1);
    sb.append("}");
    return sb.toString();
}

From source file:Main.java

public static String join(final long[] array, final char token) {
    final StringBuilder builder = new StringBuilder();
    for (final long item : array) {
        if (0 != builder.length()) {
            builder.append(token);/*from   w ww . j  a v  a2 s  .  c o m*/
        }
        builder.append(item);
    }
    return builder.toString();
}

From source file:Main.java

public static File convertFormat(File file, String newFormat) {
    StringBuilder tmpValue = new StringBuilder(file.getAbsolutePath());
    int index = tmpValue.lastIndexOf(".") + 1;
    tmpValue.delete(index, tmpValue.length());
    tmpValue.append(newFormat);/*from  www .  j a v  a2s.c om*/
    File result = new File(tmpValue.toString());

    return result;
}

From source file:Main.java

public static String join(final String[] array, final char token) {
    final StringBuilder builder = new StringBuilder();
    for (final String str : array) {
        if (0 != builder.length()) {
            builder.append(token);//from   ww w. ja  va  2  s .  co  m
        }
        builder.append(str);
    }
    return builder.toString();
}

From source file:cz.lbenda.coursing.user.UserRole.java

public static String toString(UserRole[] roles) {
    StringBuilder result = new StringBuilder();
    for (UserRole role : roles) {
        if (result.length() > 0) {
            result.append(",");
        }/*  w w  w .j av  a2  s.  c o m*/
        result.append(role.name());
    }
    return result.toString();
}

From source file:Main.java

public static String bytesToAddress(byte[] bytes) {
    StringBuilder sb = new StringBuilder();
    for (byte b : bytes) {
        sb.append(String.format("%02X:", b));
    }/*  w  w w . ja v a2 s.  co  m*/
    sb.deleteCharAt(sb.length() - 1); // remove last semicolon
    return sb.toString();
}