Example usage for java.lang String charAt

Introduction

In this page you can find the example usage for java.lang String charAt.

Prototype

public char charAt(int index)

Source Link

Document

Returns the char value at the specified index.

Usage

From source file:Main.java

public static boolean canBeCompilerOptionValue(final String text) {
    if (text.startsWith("-")) { // option or negative number
        return text.length() > 1 && Character.isDigit(text.charAt(1));
    }/*w w  w  .j ava  2 s  . c  o  m*/
    return !text.startsWith("+");
}

From source file:Main.java

/**
 * Convert a packed LCCN String to MARC display format.
 * @param packedLCCN an LCCN String in packed storage format (e.g. 'n&nbsp;&nbsp;2001050268').
 * @return  an LCCN String in MARC display format (e.g. 'n2001-50268').
 *///from   www  .  ja  v a  2s .  c om
public static String toLCCNDisplay(String packedLCCN) {
    StringBuffer sb = new StringBuffer();
    if (Character.isDigit(packedLCCN.charAt(2))) {
        sb.append(packedLCCN.substring(0, 2).trim());
        sb.append(packedLCCN.substring(2, 6));
        sb.append("-");
        int i = Integer.parseInt(packedLCCN.substring(6).trim());
        sb.append(Integer.toString(i));
    } else {
        sb.append(packedLCCN.substring(0, 3).trim());
        sb.append(packedLCCN.substring(3, 5));
        sb.append("-");
        int i = Integer.parseInt(packedLCCN.substring(5).trim());
        sb.append(Integer.toString(i));
    }
    return sb.toString();
}

From source file:Main.java

public static String getSetterName(String fieldName) {
    if (fieldName == null || fieldName.length() == 0)
        return "";

    String first = String.valueOf(fieldName.charAt(0));
    first = first.toUpperCase();/*from www.j a va  2s .  co  m*/
    return "set" + first + fieldName.substring(1);
}

From source file:Main.java

/**
 * Ensures that the given pathname ends with the path separator character
 * of this operating system./*from   w ww.  j  a  v a 2s  . c  o m*/
 * 
 * @param pathName
 * @return
 */
public final static String ensureEndsWithPathSeparatorChar(String pathName) {
    if (pathName.length() == 0)
        return File.pathSeparator;
    else if (pathName.charAt(pathName.length() - 1) == File.pathSeparatorChar)
        return pathName;
    else
        return pathName + File.pathSeparatorChar;
}

From source file:com.cuebiq.presto.scalar.HashingFunctions.java

@Description("shuffles using a pseudo random algorithm.")
@ScalarFunction//from ww w . j  a  va 2 s. c  o m
@SqlType(StandardTypes.VARCHAR)
public static Slice shuffle_string(@SqlType(StandardTypes.VARCHAR) Slice string) {
    String id = string.toStringUtf8();
    Random rnd = new Random(id.charAt(0));
    byte[] bytes = id.getBytes();
    for (int i = bytes.length; i > 1; i--) {
        swap(bytes, i - 1, rnd.nextInt(i));
    }
    return Slices.wrappedBuffer(bytes);

}

From source file:Main.java

public static String string2Unicode(String string) {
    StringBuffer unicode = new StringBuffer();
    for (int i = 0; i < string.length(); i++) {
        char c = string.charAt(i);
        unicode.append("\\" + "u" + Integer.toHexString(c));
    }//w w  w.  j  a v a 2  s .  c o m
    return unicode.toString();
}

From source file:Main.java

public static boolean isToday(String binary, int actualDay) {
    boolean today;
    int realDay = (actualDay > 1) ? actualDay - 2 : 6;
    today = binary.charAt(realDay) == '1';
    return today;
}

From source file:StringUtils.java

/**
 *  Returns true, if the argument contains a number, otherwise false.
 *  In a quick test this is roughly the same speed as Integer.parseInt()
 *  if the argument is a number, and roughly ten times the speed, if
 *  the argument is NOT a number.//from   ww  w.j a v a  2s  .c  o  m
 *
 *  @since 2.4
 *  @param s String to check
 *  @return True, if s represents a number.  False otherwise.
 */

public static boolean isNumber(String s) {
    if (s == null)
        return false;

    if (s.length() > 1 && s.charAt(0) == '-')
        s = s.substring(1);

    for (int i = 0; i < s.length(); i++) {
        if (!Character.isDigit(s.charAt(i)))
            return false;
    }

    return true;
}

From source file:Main.java

private static char labelFor(String username) {
    return Character.toUpperCase(username.charAt(0));
}

From source file:Main.java

public static byte[] stringToHexByteArray(String string) {
    byte[] bytes = new byte[4];
    if (string != null && string.length() >= 4) {
        bytes[0] = (byte) (string.charAt(0) == '1' ? 0x01 : 0x00);
        bytes[1] = (byte) (string.charAt(1) == '1' ? 0x01 : 0x00);
        bytes[2] = (byte) (string.charAt(2) == '1' ? 0x01 : 0x00);
        bytes[3] = (byte) (string.charAt(3) == '1' ? 0x01 : 0x00);
    }//ww  w  . j  av a 2  s. c  o  m
    return bytes;
}