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 String[] toArray(Collection<String> c) {
    return c.toArray(new String[c.size()]);
}

From source file:Main.java

/**
 * @return een int array van alle elementen uit de <tt>collection</tt>.
 *//* www  . j a va  2  s . c om*/
public static int[] toIntArray(Collection<Integer> collection) {
    int[] res = new int[collection.size()];
    Iterator<Integer> iterator = collection.iterator();
    for (int i = 0; i < collection.size(); i++) {
        res[i] = iterator.next();
    }
    return res;
}

From source file:Main.java

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

From source file:Main.java

public static <T> String[] trim(Collection<T> col) {

    String[] result = new String[col.size()];

    int index = 0;
    for (T e : col) {
        result[index++] = e.toString().trim();
    }//from  w w w. jav  a 2 s  .c o m

    return result;

}

From source file:Main.java

public static short[] toShortArray(Collection<? extends Number> c) {
    short arr[] = new short[c.size()];
    int i = 0;//from   ww w  .  j  a v  a2  s . co  m
    for (Number item : c) {
        arr[i++] = item.shortValue();
    }
    return arr;
}

From source file:Main.java

public static boolean isEmpty(Collection c) {
    if (c != null) {
        if (c.size() > 0) {
            return false;
        } else {/*from ww  w  . j a v a2  s.c o  m*/
            return true;
        }
    } else {
        return true;
    }
}

From source file:Main.java

public static int clear(final Collection collection) {
    final int size = collection.size();
    collection.clear();//from w ww.  j  av  a 2s  .c  o m
    return size;
}

From source file:Main.java

public static int size(Collection<?> coll) {
    return isEmpty(coll) ? 0 : coll.size();
}

From source file:Main.java

public static <T> String[] toStringArray(Collection<T> col) {

    String[] result = new String[col.size()];

    int index = 0;
    for (T e : col) {
        result[index++] = e.toString();/*from ww w .  ja  v a  2  s  .  c  om*/
    }

    return result;

}

From source file:Main.java

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