Example usage for java.util Collection contains

Introduction

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

Prototype

boolean contains(Object o);

Source Link

Document

Returns true if this collection contains the specified element.

Usage

From source file:Main.java

/**
 * Implementation of the OCL//from   www .jav  a2s  .c o m
 * <tt>Collection::includes(object : T) : Boolean</tt>
 * operation.
 * 
 * @param self the source collection
 * @param object an object
 * @return whether the collection includes the object
 */
public static boolean includes(Collection<?> self, Object object) {
    return self.contains(object);
}

From source file:Main.java

public static boolean isSubsetOf(Collection<String> subset, Collection<String> superset) {
    for (String string : subset) {
        if (!superset.contains(string)) {
            return false;
        }/*from  w  w  w  . j  av  a  2s  . co m*/
    }
    return true;
}

From source file:Main.java

public static <T> int countCommonElements(Collection<T> c1, Collection<T> c2) {
    int nbCommon = 0;
    for (T e : c1) {
        if (c2.contains(e)) {
            nbCommon++;//from www.java  2s  . co  m
        }
    }
    return nbCommon;
}

From source file:Main.java

public static boolean intersects(final Collection<?> c1, final Collection<?> c2) {
    for (Object o : c1) {
        if (c2.contains(o))
            return true;
    }//from w  ww.j a va 2 s .  c  om
    return false;
}

From source file:Main.java

public static void addAllWithoutDuplicates(Collection collection, Collection addTo) {
    for (Object obj : addTo) {
        if (!collection.contains(obj)) {
            collection.add(obj);//from w  w  w .ja  v  a  2  s  .  com
        }
    }
}

From source file:Main.java

public static boolean contains(Object o, Collection<?> c) {
    if (c == null) {
        return false;
    }/*  ww w.  j  a va2s . com*/

    return c.contains(o);
}

From source file:Main.java

public static boolean collectionContainsIgnoringCase(Collection<String> collection, String val) {
    if (collection.contains(val)) {
        return true;
    }//  w  w  w  .ja va 2  s.c  o m
    for (String f : collection) {
        if (f == val) {
            return true;
        }
        if (f == null) {
            return false;
        }
        if (f.equalsIgnoreCase(val)) {
            return true;
        }
    }
    return false;
}

From source file:Main.java

/**
 * Returns true if the given collection includes the given item.
 *
 * @param collection    The collection to check item existence in.
 * @param item          The item whose existence in the collection is to be checked.
 * @param <E>           The component type of the collection.
 * @return              True if the given collection contains the given item.
 *///from  w  w w  .  ja va  2s . co m
public static <E> boolean includes(Collection<E> collection, E item) {
    return collection != null && collection.contains(item);
}

From source file:Main.java

public static <T> boolean isNullOrContains(final Collection<?> collection, final T item) {
    return ((collection == null) || collection.contains(item));
}

From source file:Main.java

public static <T> boolean isNotNullAndContains(final Collection<?> collection, final T item) {
    return ((collection == null) && collection.contains(item));
}