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 isHexString(String key) {
    for (int i = key.length() - 1; i >= 0; i--) {
        final char c = key.charAt(i);
        if (!(c >= '0' && c <= '9' || c >= 'A' && c <= 'F' || c >= 'a' && c <= 'f')) {
            return false;
        }//from  w ww  . j  a v  a2s  . c  o m
    }

    return true;
}

From source file:Main.java

private static int getColorKeySeparator(String title) {
    for (int i = title.length() - 1; i >= 0; i--) {
        char c = title.charAt(i);
        if ('0' <= c && c <= '9')
            continue;
        if ((c == '$') && (i + 1 < title.length()))
            return i; // $ and at least one digit
        break;/* w ww  . j  a v a  2s  .  c o  m*/
    }
    return -1;
}

From source file:Main.java

/**
 * Return the last char in string. This is useful when trailing quotemark is missing on an attribute
 * @param str String/*w w  w  . j a  v a2  s.  co m*/
 * @return last char in String
 */
public static int lastChar(String str) {
    if (str != null && str.length() > 0) {
        return str.charAt(str.length() - 1);
    }

    return 0;
}

From source file:Main.java

public static String revStr(String s) {
    StringBuilder sb = new StringBuilder();
    for (int i = s.length() - 1; i >= 0; i--) {
        sb.append(s.charAt(i));
    }/*from   ww  w.  ja  va 2 s .  c  o  m*/
    return sb.toString();
}

From source file:Main.java

public static boolean isValidBase64Encoding(String data) {
    for (int i = 0; i < data.length(); i++) {
        char ch = data.charAt(i);
        if (ch == BASE64PAD || ch < DECODETABLE.length && DECODETABLE[ch] != Byte.MAX_VALUE) {
            // do nothing
        } else if (ch == '\r' || ch == '\n') {
            // do nothing
        } else {//from   w w  w .  ja v  a2s . c o  m
            return false;
        }
    }
    return true;
}

From source file:Main.java

public static String javaToDexName(String javaName) {
    javaName = javaName.replace('.', '/');
    if (javaName.length() > 1 && javaName.charAt(javaName.length() - 1) != ';') {
        javaName = 'L' + javaName + ';';
    }/* w  w w. j  a  va 2  s .  co m*/
    return javaName;
}

From source file:Main.java

private static String removeBadFirstCharacters(String line) {
    boolean shouldRemove = false;
    char first = line.charAt(0);
    for (char badFirstSymbol : BAD_FIRST_SYMBOLS) {
        if (first == badFirstSymbol) {
            shouldRemove = true;// ww  w . java2 s .c o  m
            break;
        }
    }

    return shouldRemove ? line.substring(1) : line;
}

From source file:Main.java

private static boolean checkNum(String sCard2) {
    for (int i = 0, len = sCard2.length() - 1; i < len; i++) {
        if ((sCard2.charAt(i) > '9' || sCard2.charAt(i) < '0')) {
            return false;
        }//from  w  w w . j  a v a  2 s  . c o  m
    }
    return true;
}

From source file:Main.java

/**
 * Get the mnemonic from the given text. The mnemonic is marked by a leading & character.
 * @param text The mnemonic search text.
 * @return The mnemonic or -1 if no mnemonic could be found.
 *///from w  w  w  .j ava  2s .  co  m
public static int getMnemonicKeyCode(String text) {
    for (int i = 0; i < text.length(); i++) {
        char c = text.charAt(i);
        if (c == '&') {
            try {
                return (int) text.charAt(i + 1);
            } catch (IndexOutOfBoundsException e) {
                return -1;
            }
        }
    }
    return -1;
}

From source file:Main.java

public static String capitalizeFirstLetter(String str) {
    if (isEmpty(str)) {
        return str;
    }/* w  w  w  .  j av a  2  s  . co  m*/

    char c = str.charAt(0);
    return (!Character.isLetter(c) || Character.isUpperCase(c)) ? str
            : new StringBuilder(str.length()).append(Character.toUpperCase(c)).append(str.substring(1))
                    .toString();
}