I am trying to link the value of a key to another key’s value but cannot seem to get it working. For example, if I’m creating a HashMap and adding a key-value pair (“x”, 0) to it. I then want to be able to add other keys mapped to the same value as the first one. So if I have
Tag: key
How can I check if a hashmap contains a key of a custom class type?
I have a hashmap whose keys are of a custom class type (class A) and I want to check whether an child class B (B extends A) appears as a key in the map. IntelliJ gives me no warnings for the following code, but it’s not going into the statement. What could be wrong? Answer You are checking if the
Can an array be used as a HashMap key?
If a HashMap’s key is a String[] array: Can you access the map by using a newly created String[] array, or does it have to be the same String[] object? Answer It will have to be the same object. A HashMap compares keys using equals() and two arrays in Java are equal only if they are the same object. If
How to print all key and values from HashMap in Android?
I am trying to use HashMap in Android sample project. Now, am doing sample project for learn android. I just store keys and values in HashMap, i want to show the keys and their values in EditView. I followed below code in my sample project. But, first key and value only printing in EditView. In EditView iOS = 100 is