Java 8: HashMap initialization with lambda expressions

Question

I\'m trying to declare and define larger hash map at once. This is how I do it:

public HashMap> opcode_only = new HashMap&l         


        

Answer 1

You are doing correct, update JDK library to 1.8 version from Java Build Path in Eclipse Project properties.

I just now tried the below code and it is working fine on my Eclipse:

        HashMap hmLambda = new HashMap() {
        {
            put(0, 1);
            put(1, 1);
        }
    };
    System.out.println(hmLambda.get(0));

    hmLambda.forEach((k, v) -> System.out.println("Key " + k
            + " and Values is: " + v));