Creating a map in Java, parameter error

问题

I currently have this piece of code:

Map<Double, Character> memory = new HashMap<Double, Character>();

However it returns this error upon compiling:

GameLogic.java:5: type Map does not take parameters
Map<Double, Character> memory = new HashMap<Double, Character>();
   ^
1 error

I have no idea why its doing this as I see no reason it should after looking at other questions. It is within the 'GameLogic' class. Please could someone help.

回答1:

Two possible mistakes:

• You are using JKD 1.4
• You imported something else than java.util.Map

回答2:

You may have imported the wrong Map class. java.util.Map takes parameters.

来源：https://stackoverflow.com/questions/21977204/creating-a-map-in-java-parameter-error