Example usage for java.util Collection isEmpty

Introduction

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

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this collection contains no elements.

Usage

From source file:Main.java

public static boolean isNotNull(Collection<?> c) {
    if (c == null || c.isEmpty()) {
        return false;
    } else {//from  w w  w.j ava 2  s.  c  om
        return true;
    }
}

From source file:Main.java

public static Object getFirstItem(Collection<?> collection) {
    return null == collection || collection.isEmpty() ? null : collection.iterator().next();
}

From source file:Main.java

public static <T> boolean isCollectionEmpty(Collection<T> collection) {
    return collection == null || collection.isEmpty();
}

From source file:Main.java

public static boolean isEmpty(Collection input) {
    return input == null || input.isEmpty();
}

From source file:Main.java

public static boolean isValid(Collection<?> coll) {
    return coll != null && !coll.isEmpty();
}

From source file:Main.java

public static <T> T getAny(Collection<T> c) {
    if (c != null && !c.isEmpty()) {
        for (T t : c) {
            return t;
        }//from w  w  w.ja  v  a 2s  . c o m
    }
    return null;
}

From source file:Main.java

public static <T> boolean notNullOrEmpty(Collection<T> c) {
    return nonNull(c) && !c.isEmpty();
}

From source file:Main.java

@SuppressWarnings("rawtypes")
public static boolean isValid(Collection col) {
    return !(col == null || col.isEmpty());
}

From source file:Main.java

public static <T> Boolean isEmpty(Collection<T> collection) {
    return collection == null || collection.isEmpty();
}

From source file:Main.java

public static <E> void intersection(final Collection<E> a, final Collection<E> b) {
    if (b != null && !b.isEmpty()) {
        if (a.isEmpty()) {
            a.addAll(b);/*from ww  w .  j  a v  a 2 s .  c om*/
        } else {
            a.retainAll(b);
        }
    }
}