Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.util.Collection;

import java.util.HashSet;

import java.util.Map;

public class Main {
    public static <V> HashSet<V> getHashSet(final Map<?, ? extends V> map,
            final Collection<? extends Object> keys) {
        final HashSet<V> result = new HashSet<V>();
        get(map, keys, result);
        return result;
    }

    public static <V> HashSet<V> getHashSet(final Map<?, ? extends V> map, final Object... keys) {
        final HashSet<V> result = new HashSet<V>();
        get(map, result, keys);
        return result;
    }

    public static <V> void get(final Map<?, ? extends V> map, final Collection<? extends Object> keys,
            final Collection<? super V> values) {
        for (final Object key : keys) {
            if (!map.containsKey(key)) {
                continue;
            }

            final V value = map.get(key);
            values.add(value);
        }
    }

    public static <V> void get(final Map<?, ? extends V> map, final Collection<? super V> values,
            final Object... keys) {
        for (final Object key2 : keys) {
            final Object key = key2;
            if (!map.containsKey(key)) {
                continue;
            }

            final V value = map.get(key);
            values.add(value);
        }
    }
}