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 isEmpty(Collection<?> coll) {
    return coll == null || coll.isEmpty();
}

From source file:Main.java

public static Object findOne(Collection coll) {
    if (coll.isEmpty()) {
        return null;
    } else if (coll.size() > 1) {
        throw new RuntimeException("Expected only one member in collection, found many: " + coll.toString());
    } else {/*from w w w.ja v a  2  s  . c om*/
        return coll.iterator().next();
    }
}

From source file:Main.java

@SuppressWarnings("unchecked")
public static boolean isEmpty(Collection coll) {
    return ((coll == null) || (coll.isEmpty()));
}

From source file:Main.java

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

From source file:Main.java

public static <T> boolean isNullOrEmpty(final Collection<T> c) {
    return c == null || c.isEmpty();
}

From source file:Main.java

public static int largestList(Collection<? extends Collection> cs) {
    if (cs.isEmpty())
        return -1;
    int large = 0;
    for (Collection c : cs) {
        large = Math.max(large, c.size());
    }//  ww w  . j  a  va 2s .com
    return large;
}

From source file:Main.java

public static <T> boolean isEmpty(Collection<T> list) {

    if (list == null || list.isEmpty() || list.size() == 0) {
        return true;
    }//from ww  w  .  j ava2 s  . co  m
    return false;
}

From source file:Main.java

public static <E> boolean isNil(Collection<E> colletion) {
    return colletion == null || colletion.isEmpty();
}

From source file:Main.java

public static boolean isEmpty(final Collection<?> coll) {
    return coll == null || coll.isEmpty();
}

From source file:Main.java

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