Example usage for java.util List isEmpty

Introduction

In this page you can find the example usage for java.util List isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this list contains no elements.

Usage

From source file:com.mobius.software.mqtt.performance.runner.util.FileUtil.java

public static void logErrors(UUID scenarioID, List<ClientReport> reports) {
    if (reports.isEmpty())
        return;/*from  w  ww  .j  a v a  2 s  .  co m*/

    String filename = DIRECTORY_NAME + File.separator + scenarioID.toString() + LOG_EXTENSION;
    File log = new File(filename);
    if (!log.getParentFile().exists())
        log.getParentFile().mkdir();
    try (PrintWriter pw = new PrintWriter(log)) {
        for (ClientReport clientReport : reports) {
            List<ErrorReport> errorReports = clientReport.getErrors();
            if (!errorReports.isEmpty()) {
                String errorContent = ReportBuilder.buildError(clientReport.getIdentifier(), errorReports);
                pw.println(errorContent);
            }
        }
    } catch (IOException e) {
        logger.error("An error occured while writing error reports to file:" + e.getMessage());
    }

    if (log.length() == 0)
        log.delete();
}

From source file:Main.java

/**
 * This method checks if the list is not null and have elements.
 * /*from   w  ww  . ja  v  a2  s. co m*/
 * @param <E>
 * 
 * @param list
 *          the list to check
 * @return true/false
 */
public static <E> boolean isNotEmpty(List<E> list) {
    return list != null && !list.isEmpty();
}

From source file:Main.java

public static boolean isLauncherActivity(Context context, String packageName) {
    Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
    mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
    mainIntent.setPackage(packageName);// w w  w .  j  a  v  a2  s  .com
    List<ResolveInfo> infoList = context.getPackageManager().queryIntentActivities(mainIntent, 0);
    if (infoList.isEmpty()) {
        return false;
    } else {
        return true;
    }
}

From source file:Main.java

protected static Type getGenericParameter(Type type, int index) {
    if (!ParameterizedType.class.isInstance(type)) {
        return null;
    }/*w ww. jav a 2 s. c o m*/
    final List<Type> genericParameter = getGenericParameterList(type);
    if (genericParameter.isEmpty()) {
        return null;
    }
    return genericParameter.get(index);
}

From source file:org.confab.Utilities.java

public static void printCookieStore(CookieStore cookieStore) {
    debug("printCookies");
    List<Cookie> cookies = cookieStore.getCookies();
    if (cookies.isEmpty()) {
        System.out.println("None");
    } else {/*from  www  .jav a 2  s.  c  o  m*/
        for (int i = 0; i < cookies.size(); i++) {
            System.out.println("- " + cookies.get(i).toString());
        }
    }
    debug("end printCookies");
}

From source file:com.aimluck.eip.modules.actions.project.util.ProjectTestUtil.java

public static <T> List<List<T>> devide(List<T> origin, int size) {
    if (origin == null || origin.isEmpty() || size <= 0) {
        return Collections.emptyList();
    }/*  ww w . j a v a 2s  .c  om*/

    int block = origin.size() / size + (origin.size() % size > 0 ? 1 : 0);

    List<List<T>> devidedList = new ArrayList<List<T>>(block);
    for (int i = 0; i < block; i++) {
        int start = i * size;
        int end = Math.min(start + size, origin.size());
        devidedList.add(new ArrayList<T>(origin.subList(start, end)));
    }
    return devidedList;
}

From source file:Main.java

public static boolean isIntentResolvable(Context context, Intent intent) {
    final PackageManager packageManager = context.getPackageManager();
    List<ResolveInfo> resolveInfo = packageManager.queryIntentActivities(intent, 0);
    return resolveInfo != null && !resolveInfo.isEmpty();
}

From source file:Main.java

/**
 * Utility method to check if a shortcut can be added to the homescreen.
 * @param context Context used to get the package manager.
 * @return if a shortcut can be added to the homescreen under the current profile.
 *///from   ww  w.ja va  2  s  .  c  o  m
public static boolean isAddToHomeIntentSupported(Context context) {
    PackageManager pm = context.getPackageManager();
    Intent i = new Intent(INSTALL_SHORTCUT);
    List<ResolveInfo> receivers = pm.queryBroadcastReceivers(i, PackageManager.GET_INTENT_FILTERS);
    return !receivers.isEmpty();
}

From source file:Main.java

/**
 * //w w  w .  java 2  s  .com
 * @param <T>
 * @param list
 * @param comparator
 * @return
 * @author sabuj.das
 */
public static <T> T lowestValue(List<T> list, Comparator<T> comparator) {
    if (list == null || list.isEmpty()) {
        return null;
    }
    Collections.sort(list, comparator);
    return list.get(0);
}

From source file:Main.java

public static <T> List<T> sub(List<T> list, int start, int end) {
    if (list == null || list.isEmpty()) {
        return null;
    }//from  w  w  w. ja  v a 2s  .com

    if (start < 0) {
        start = 0;
    }
    if (end < 0) {
        end = 0;
    }

    if (start > end) {
        int tmp = start;
        start = end;
        end = tmp;
    }

    final int size = list.size();
    if (end > size) {
        if (start >= size) {
            return null;
        }
        end = size;
    }

    return list.subList(start, end);
}