Create DoubleHashMap.java

Author: intisy

src/main/java/io/github/intisy/utils/custom/DoubleHashMap.java

@@ -0,0 +1,33 @@
+package io.github.intisy.utils.custom;
+
+import io.github.intisy.utils.custom.Doublet;
+import io.github.intisy.utils.custom.Triplet;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.stream.Collectors;
+
+public class DoubleHashMap<K, V1, V2> extends HashMap<K, Doublet<V1, V2>> {
+    public void put(K key, V1 value1, V2 value2) {
+        super.put(key, new Doublet<>(value1, value2));
+    }
+
+    public V1 getValue1(K key) {
+        return get(key).getKey();
+    }
+
+    public V2 getValue2(K key) {
+        return get(key).getValue();
+    }
+
+
+    public Collection<V1> values1() {
+        return values().stream().map(Doublet::getKey).collect(Collectors.toList());
+    }
+
+    public Collection<V2> values2() {
+        return values().stream().map(Doublet::getValue).collect(Collectors.toList());
+    }
+
+}
+