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:Main.java

public static String join(List<String> list, String delimiter) {
    if (list == null || list.isEmpty()) {
        return "";
    }//from   w  w  w.ja  v  a 2 s.  c o  m
    final StringBuilder builder = new StringBuilder();
    boolean first = true;
    for (String s : list) {
        if (first) {
            first = false;
        } else {
            builder.append(delimiter);
        }
        builder.append(s);
    }
    return builder.toString();
}

From source file:Main.java

public static Element getChildElement(Element parent, String tagName) {
    List<Element> children = getChildElements(parent, tagName);
    if (children.isEmpty()) {
        return null;
    } else {//from  ww w  . j a  v  a  2  s. c om
        return children.get(0);
    }
}

From source file:com.github.jakubkolar.autobuilder.groovy.Table.java

public static Table of(List<TableRow> rows) {
    if (rows.isEmpty()) {
        throw new IllegalArgumentException("No rows defined: every table must have"
                + " at least 1 row (the header). Also please check that your table"
                + " has at least 2 columns separated by the '|' operator (technical" + " restriction)");
    }/*from  w  w w  .  j av a 2 s . c om*/

    Table table = new Table(rows.get(0));

    for (int i = 1; i < rows.size(); i++) {
        table.add(rows.get(i));
    }

    return table;
}

From source file:Main.java

/**
 * Checks if the application is in the background (i.e behind another application's Activity).
 * //from   ww  w . jav  a  2  s  .  c o m
 * @param context
 * @return true if another application is above this one.
 */
public static boolean isApplicationBroughtToBackground(final Context context) {
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    List<RunningTaskInfo> tasks = am.getRunningTasks(1);
    if (!tasks.isEmpty()) {
        ComponentName topActivity = tasks.get(0).topActivity;
        if (!topActivity.getPackageName().equals(context.getPackageName())) {
            return true;
        }
    }

    return false;
}

From source file:Main.java

public static <T> Object getContent(List<T> collection, Object object) {
    Object retValue = null;//w ww  .j a v  a  2 s .c om
    if (collection != null && !collection.isEmpty() && collection.contains(object)) {
        retValue = collection.get(collection.indexOf(object));
    }
    return retValue;
}

From source file:Main.java

public static String getTopActivityName(Context context) {
    try {/*from  ww  w.ja va  2  s . c  o m*/
        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningTaskInfo> tasks = am.getRunningTasks(1);
        if (!tasks.isEmpty()) {
            ComponentName topActivity = tasks.get(0).topActivity;
            return topActivity.getClassName();
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return "";
}

From source file:Main.java

public static <T> boolean listsEquals(List<T> list1, List<T> list2) {
    if (list1 == null) {
        return list2 == null || list2.isEmpty();
    }/*  www  . jav a 2  s .c om*/
    if (list1.size() != list2.size()) {
        return false;
    }
    return list1.containsAll(list2);
}

From source file:Main.java

public static boolean isApplicationInStackHead(Context context) {
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    List<RunningTaskInfo> taskList = am.getRunningTasks(1);
    if (taskList != null && !taskList.isEmpty()) {
        ComponentName topActivity = taskList.get(0).topActivity;
        if (topActivity != null && !topActivity.getPackageName().equals(context.getPackageName())) {
            return false;
        }/*from   w  w  w. j a v  a  2 s  .  com*/
    }
    return true;
}

From source file:Main.java

public static boolean isApplicationInBackground(Context context) {
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    List<RunningTaskInfo> taskList = am.getRunningTasks(1);
    if (taskList != null && !taskList.isEmpty()) {
        ComponentName topActivity = taskList.get(0).topActivity;
        if (topActivity != null && !topActivity.getPackageName().equals(context.getPackageName())) {
            return true;
        }/*from  ww  w  .  j  a v a 2 s.c  om*/
    }
    return false;
}

From source file:net.firejack.platform.core.utils.ArrayUtils.java

public static <T> T[] append(T[] array, List<T> list, Class<T> clazz) {
    if (list == null || list.isEmpty()) {
        return array;
    }//w w w .  j  av a  2  s . c om
    T[] additionalItems = getArray(list, clazz);
    return array == null ? additionalItems : (T[]) addAll(array, additionalItems);
}