Example usage for java.util Collection size

Introduction

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

Prototype

int size();

Source Link

Document

Returns the number of elements in this collection.

Usage

From source file:Main.java

public static boolean isNotEmpty(Collection<?> coll) {
    return coll != null && coll.size() != 0;
}

From source file:Main.java

public static <T> boolean isNotEmpty(Collection<T> list) {
    return list != null && list.size() > 0;
}

From source file:Main.java

public static String collection2str(Collection<?> c) {
    if (c.size() == 0)
        return "[]";
    StringBuilder result = new StringBuilder("[");
    for (Object elem : c) {
        if (c.size() != 1)
            result.append("\n  ");
        result.append(elem);//from  ww  w  .ja  v a 2s .  c  om
    }
    if (c.size() != 1)
        result.append("\n");
    result.append("]");
    return result.toString();
}

From source file:Main.java

public static <T> boolean isEmpty(Collection<T> list) {
    return list == null || list.size() == 0;
}

From source file:Main.java

public static <T> T uniqueResult(final Collection<T> c) {
    switch (c.size()) {
    case 0://from w ww. j a v a 2 s  .c o  m
        return null;
    case 1:
        return c.iterator().next();
    default:
        throw new IllegalStateException("Unexpected number of elements in collection: " + c.size());
    }
}

From source file:Main.java

public static boolean isEmpty(Collection col) {
    return col == null || col.size() == 0;
}

From source file:Main.java

public static int size(Collection col) {
    return (col != null) ? col.size() : 0;
}

From source file:Main.java

public static boolean isEmpty(Collection<?> list) {
    if (list == null || list.size() <= 0)
        return true;
    else/*from www  .j  a v  a2 s .  com*/
        return false;
}

From source file:Main.java

public static <E> int size(Collection<E> c) {
    return c == null ? 0 : c.size();
}

From source file:Main.java

public static Boolean isEmpty(Collection c) {
    if (c == null || c.size() < 1) {
        return true;
    }//w  ww  . ja  va2s  . co  m
    return false;
}