Example usage for java.util ArrayList isEmpty

Introduction

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

Prototype

public boolean isEmpty()

Source Link

Document

Returns true if this list contains no elements.

Usage

From source file:Main.java

public static boolean isNotNullAndNotEmpty(ArrayList list) {
    return list != null || !list.isEmpty();
}

From source file:Main.java

public static <T> T last(Collection<? extends T> collection) {
    ArrayList<T> list = new ArrayList<>(collection);
    return list.isEmpty() ? null : list.get(list.size() - 1);
}

From source file:Main.java

public static <T> T first(Collection<? extends T> collection) {
    ArrayList<T> list = new ArrayList<>(collection);
    return list.isEmpty() ? null : list.get(0);
}

From source file:Main.java

private static String listToString(ArrayList<String> pathSpec) {
    if (pathSpec.isEmpty())
        return "";
    StringBuilder ret = new StringBuilder();
    ret.append(pathSpec.get(0));//  w  w w.  ja va2s .  co m
    for (int i = 1, n = pathSpec.size(); i < n; i++)
        ret.append(File.separator).append(pathSpec.get(i));
    return ret.toString();
}

From source file:Main.java

public static int indexOfItem(ArrayList<String> list, final String item) {
    if (item == null || list.isEmpty()) {
        return -1;
    }//from  www. j a v  a 2  s  .com
    for (int i = 0; i < list.size(); i++) {
        if (item.equals(list.get(i))) {
            return i;
        }
    }
    return -1;
}

From source file:Main.java

public static boolean isEmpty(ArrayList<?> arrayList) {
    return arrayList == null || arrayList.isEmpty();
}

From source file:Main.java

public static Element getFirstElementByTagName(Node node, String tagName) {
    ArrayList<Element> elements = getElementsByTagName(node, tagName);
    if (!elements.isEmpty())
        return elements.get(0);
    return null;//from   w ww. j  a va2s  .c  o  m
}

From source file:Main.java

public static MBeanServer findMBeanServer() {
    ArrayList<MBeanServer> servers = MBeanServerFactory.findMBeanServer(null);
    if (servers == null || servers.isEmpty()) {
        return ManagementFactory.getPlatformMBeanServer();
    }/*from   w ww  .j  a  va  2s  .  co m*/

    return servers.get(0);
}

From source file:Main.java

public static String arrayParamToString(ArrayList<String> strings) {

    String arrayToStringParam = "";

    if (strings != null && !strings.isEmpty()) {

        for (int i = 0; i < strings.size(); i++) {

            String param = strings.get(i);

            if (i == 0)
                arrayToStringParam += param;
            else/*from   w  ww  . j  av  a2  s.c o  m*/
                arrayToStringParam += "," + param;

        }
    }

    return arrayToStringParam;
}

From source file:Main.java

public static String getTabsStringFromList(final ArrayList<String> tabs) {
    final StringBuilder resultTabs;

    if (tabs == null || tabs.isEmpty()) {
        resultTabs = new StringBuilder("");
    } else {// www. j a  v  a  2s.  co  m
        resultTabs = new StringBuilder(tabs.size() * 10);
        resultTabs.append(tabs.get(0));
        for (int i = 1; i < tabs.size(); i++) {
            resultTabs.append(LIBRARY_TABS_DELIMITER);
            resultTabs.append(tabs.get(i));
        }
    }

    return resultTabs.toString();
}