new module: utils

utils/src/main/java/mc/utils/Table.java

@@ -0,0 +1,23 @@
+package mc.utils;
+
+import javax.annotation.Nullable;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Table<C, R, V> {
+
+	private final Map<C, Map<R, V>> map = new HashMap<>();
+
+	@Nullable
+	public V getColumnAndRow(C column, R row) {
+		if (!map.containsKey(column)) {
+			return null;
+		}
+
+		return map.get(column).get(row);
+	}
+
+	public void put(C column, R row, V value) {
+		map.computeIfAbsent(column, c -> new HashMap<>()).put(row, value);
+	}
+}