How to declare and assign the values to a hashMap directly

Question

Like String s="sample" in java.How to declare and assign values to a hashMap in one step. Also is it possible to assign more set of values at a time using put function in hashMap.

Answer 1

Yes, it is possible. you can use the below code

HashMap<String,String> instruments = new HashMap<String, String>() {
{
        put("test","test");
        put("test1","test1");
}
};

Answer 2

Use a library like Google Guava which has lots of utilities to instantiate HashMaps. It is also possible doing anonymous inheritance like this:

    Map<String, Object> map = new HashMap<String, Object>() {{
        put("Test", "Test1");
        put("Test", "Test1");
    }};

But I wouldn't recommend it.