MapUtils.java

package demo.maps;

import java.util.HashMap;
import java.util.Map;

import static demo.maps.MapUtils.P.p;

public class MapUtils {

    private MapUtils() {
    }

    public static class P<A, B> {
        public final A a;
        public final B b;

        public P(final A a, final B b) {
            this.a = a;
            this.b = b;
        }

        public static <A, B> P<A, B> p(final A a, final B b) {
            return new P<A, B>(a, b);
        }
    }

    public static <K, V> Map<K, V> m(final P<K, V>... ps) {
        final Map<K, V> map = new HashMap<K, V>();
        for (final P<K, V> p : ps) {
            map.put(p.a, p.b);
        }
        return map;
    }

    static {
        final Map<String, Integer> mymap = m(p("hello", 3), p("blah", 4), p("frog", 7));
    }
}