Example usage for java.lang String isEmpty

Introduction

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

Prototype

public boolean isEmpty()

Source Link

Document

Returns true if, and only if, #length() is 0 .

Usage

From source file:Main.java

public static String getElementText(Element namedElement) {
    if (namedElement == null) {
        return null;
    }/*ww  w  .j  av  a  2  s .  co m*/
    String text = namedElement.getTextContent();
    return (text.isEmpty()) ? null : text;
}

From source file:Main.java

/**
 * Creates a flag for the given ABI.// ww  w .  j a  va 2  s . co m
 * @param abi the ABI to create the flag for.
 * @return a string which can be add to a command sent to ADB.
 */
public static String createAbiFlag(String abi) {
    if (abi == null || abi.isEmpty() || !isAbiSupportedByCts(abi)) {
        return "";
    }
    return String.format("--abi %s ", abi);
}

From source file:Main.java

/**
 * Extracts the enum constant of the specified enum class with the
 * specified name. The name must match exactly an identifier used
 * to declare an enum constant in the given class.
 *
 * @param clazz the {@code Class} object of the enum type from which
 *       to return a constant.//from  w w w .j  a  v  a 2s  .c  o  m
 * @param name the name of the constant to return.
 * @return the enum constant of the specified enum type with the
 *      specified name.
 *
 * @throws IllegalArgumentException if the specified enum type has
 *         no constant with the specified name, or the specified
 *         class object does not represent an enum type.
 *
 * @see {@link Enum#valueOf(Class, String)}
 */
@SuppressWarnings({ "unchecked", "rawtypes" })
public static Object getEnumConstant(Class<?> clazz, String name) {
    if (clazz == null || name == null || name.isEmpty()) {
        return null;
    }
    return Enum.valueOf((Class<Enum>) clazz, name);
}

From source file:Main.java

/**
 * Read a file and return as a String//from www  .  j av a2s .  c om
 *
 * @param path      the filepath to append the extension to
 * @param extension the extension to be appended
 * @return the string representing the filename with extension
 * @since 0.11.0
 */
public static String addExtension(String path, String extension) {
    if (path == null || path.isEmpty()) {
        return "";
    }

    if (extension == null || extension.isEmpty()) {
        return path;
    }

    return path + "." + extension;
}

From source file:Main.java

/**
 * Checks if the passed String is null or empty
 * @param t object to check/*from   w w w .ja v a 2  s .  c  o  m*/
 * @return boolean, true if it is null or empty, false if it is not.
 */
public static <T> boolean isNullOrEmpty(T t) {
    if (t == null) {
        return true;
    }
    String str = t.toString();
    if (str.isEmpty()) {
        return true;
    }
    if (str.length() == 0) {
        return true;
    }
    return false;
}

From source file:Main.java

public static <T> String concat(Collection<T> col, String separator) {

    StringBuilder result = new StringBuilder();

    for (T e : col) {
        String s = e.toString();
        if (!s.isEmpty()) {
            if (result.length() > 0)
                result.append(separator);
            result.append(s);/*from w  ww  .  ja v a  2  s  .c o  m*/
        }
    }

    return result.toString();

}

From source file:Main.java

public static String prettyFormat(String xml) {
    if (xml == null || xml.isEmpty() || !xml.contains("<")) {
        //          System.out.println("Why?"+xml.startsWith("<", 0));
        return xml;
    }//  w w  w .  j  ava 2 s . c  o m
    try {
        Transformer serializer = SAXTransformerFactory.newInstance().newTransformer();
        serializer.setOutputProperty(OutputKeys.INDENT, "yes");
        //serializer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
        serializer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        Source xmlSource = new SAXSource(new InputSource(new ByteArrayInputStream(xml.getBytes())));
        StreamResult res = new StreamResult(new ByteArrayOutputStream());
        serializer.transform(xmlSource, res);
        return new String(((ByteArrayOutputStream) res.getOutputStream()).toByteArray()).replace("><", ">\n<");
    } catch (Exception e) {
        System.out.println("prettyFormat: Error.." + e.getMessage());
        //TODO log error
        return xml.replace("<", "\n<");
        //            return xml.replace("><", ">\n<");
    }
}

From source file:Main.java

/** check if string is valid ipv4 */
public static boolean validIP(String ip) {
    if (ip == null || ip.isEmpty())
        return false;
    ip = ip.trim();//  w w  w.  j av  a2  s.c o  m
    if ((ip.length() < 6) & (ip.length() > 15))
        return false;

    try {
        Pattern pattern = Pattern.compile(
                "^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$");
        Matcher matcher = pattern.matcher(ip);
        return matcher.matches();
    } catch (Exception e) {
        return false;
    }
}

From source file:Main.java

public static String serializeNamespaces(Map<String, String> namespaces) {
    String serialization = "";
    for (Entry<String, String> entry : namespaces.entrySet()) {
        String localPart = entry.getKey();
        String namespace = localPart.isEmpty() ? "xmlns" : ("xmlns:" + localPart);
        serialization = concatKeyValue(serialization, namespace, entry.getValue());
    }/*w w w.  j a  va  2s .  c om*/
    return serialization;
}

From source file:org.eclipse.dirigible.cli.utils.Utils.java

public static boolean isEmpty(String property) {
    return property == null || property.isEmpty();
}