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

/**
 * Get the mac address for mesh usage(For mesh require the BSSID uppercase and without colon). It is an inverse
 * method for getRawMacAddress// ww  w  .  j av  a2  s  .  co  m
 * 
 * @param bssid the bssid get from wifi scan
 * @return the mac address for mesh usage
 */
public static String getMacAddressForMesh(String bssid) {
    StringBuilder sb = new StringBuilder();
    char c;
    for (int i = 0; i < bssid.length(); i++) {
        c = bssid.charAt(i);
        if (c != ':') {
            sb.append(c);
        }
    }
    return sb.toString().toUpperCase(Locale.US);
}

From source file:Main.java

public static String generateRandomString(int len) {
    String all = "0123456789abcdefghijklmnopqrstuvwxyz";
    StringBuffer s = new StringBuffer();
    for (int i = 0; i < len; i++) {
        s.append(all.charAt(getRandomNum(36)));
    }// w  w w .  j  a v  a2 s. c om

    return s.toString();
}

From source file:Main.java

private static String __getNextWord(String s, int pos) {
    int i = 0;/*from ww w . j  a  v a  2  s  . c  om*/
    StringBuilder sb = new StringBuilder();
    while (pos + i < s.length()) {
        char c = s.charAt(pos + i);
        if (Character.isLetter(c)) {
            sb.append(c);
        } else {
            break;
        }
        i++;
    }
    if (sb.length() == 0)
        return null;
    return sb.toString();
}

From source file:Main.java

public static String upperFirstAndAddPre(String str, String preString) {
    if (str == null || preString == null) {
        return null;
    }/*w ww . j  av  a  2s.c om*/
    return preString + Character.toUpperCase(str.charAt(0)) + str.substring(1);
}

From source file:Main.java

public static void putInHashMapByGivenAttribute(HashMap map, Object obj, String attribName) {
    try {//w  w w . ja  v  a 2s . com
        Class class1 = obj.getClass();
        String methodName = "get" + Character.toUpperCase(attribName.charAt(0)) + attribName.substring(1);
        Method method = class1.getMethod(methodName, new Class[0]);
        Object attributeValue = method.invoke(obj, new Object[0]);
        map.put(attributeValue, obj);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static boolean isInteger(String s, int radix) {
    if (s.isEmpty())
        return false;
    for (int i = 0; i < s.length(); i++) {
        if (i == 0 && s.charAt(i) == '-') {
            if (s.length() == 1)
                return false;
            else//from  ww  w.  j  a  v  a2  s  .  c  om
                continue;
        }
        if (Character.digit(s.charAt(i), radix) < 0)
            return false;
    }
    return true;
}

From source file:Main.java

public static boolean contains(final String searchableString, final String restriction) {
    int i = 0, j = 0;
    while ((i < restriction.length()) && (j < searchableString.length())) {
        if (restriction.charAt(i) == searchableString.charAt(j)) {
            ++i;//ww w  .j  a v a  2  s  .com
            ++j;
        } else {
            ++j;
        }
    }
    if (i == restriction.length()) {
        return true;
    }
    return false;
}

From source file:Main.java

public static URL createURL(String fileName) throws MalformedURLException {
    URL url = null;//from   www.j  av  a 2 s  .co m
    try {
        url = new URL(fileName);
    } catch (MalformedURLException ex) {
        File f = new File(fileName);
        try {
            String path = f.getAbsolutePath();

            String fs = System.getProperty("file.separator");
            if (fs.length() == 1) {
                char sep = fs.charAt(0);
                if (sep != '/') {
                    path = path.replace(sep, '/');
                }
                if (path.charAt(0) != '/') {
                    path = '/' + path;
                }
            }
            path = "file://" + path;
            url = new URL(path);
        } catch (MalformedURLException e) {
            throw e;
        }
    }
    return url;
}

From source file:Main.java

public static boolean containsChinese(String s) {
    if (null == s || "".equals(s.trim()))
        return false;
    for (int i = 0; i < s.length(); i++) {
        if (isChinese(s.charAt(i)))
            return true;
    }/*from   ww  w .ja v a  2 s  . c o m*/
    return false;
}

From source file:exm.stc.tclbackend.tree.Proc.java

/**
 * Check that there are no invalid characters
 */// w w  w  .  java  2  s .  c o m
private static void checkTclFunctionName(String name) {
    for (int i = 0; i < name.length(); i++) {
        char c = name.charAt(i);
        if (Character.isLetter(c) || Character.isDigit(c) || c == ':' || c == '_' || c == '=' || c == '-'
                || c == '<' || c == '>') {
            // Whitelist of characters
        } else {
            throw new STCRuntimeError("Bad character '" + c + "' in tcl function name " + name);
        }
    }
}