Remove key in collection from Map - Android java.util

Android examples for java.util:Map

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Description

Remove key in collection from Map

Demo Code

/*//from   w w  w.  j a va  2  s  .  c o  m
 *******************************************************************************
 * Copyright (C) 1996-2015, International Business Machines Corporation and    *
 * others. All Rights Reserved.                                                *
 *******************************************************************************
 */
import java.util.Collection;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.regex.Matcher;
public class Main{
    /**
     * Utility that ought to be on Map
     * @param m 
     * @param itemsToRemove 
     * @param <K> 
     * @param <V> 
     * @return map passed in
     */
    public static <K, V> Map<K, V> removeAll(Map<K, V> m,
            Collection<K> itemsToRemove) {
        for (Iterator it = itemsToRemove.iterator(); it.hasNext();) {
            Object item = it.next();
            m.remove(item);
        }
        return m;
    }
    /**
     * Remove matching items
     * @param <T>
     * @param <U>
     * @param c
     * @param f
     * @return
     */
    public static <T, U extends Collection<T>> U removeAll(U c,
            ObjectMatcher<T> f) {
        for (Iterator<T> it = c.iterator(); it.hasNext();) {
            T item = it.next();
            if (f.matches(item))
                it.remove();
        }
        return c;
    }
    public static String remove(String source, UnicodeSet removals) {
        StringBuffer result = new StringBuffer();
        int cp;
        for (int i = 0; i < source.length(); i += UTF16.getCharCount(cp)) {
            cp = UTF16.charAt(source, i);
            if (!removals.contains(cp))
                UTF16.append(result, cp);
        }
        return result.toString();
    }
}

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