Adding elements to a HashMap Java-CodePudding

I have a file which has names and numbers.

The file looks as follows :

Adam 250 321
John 120 431
Alex 200 200
Iris 121 221

is it possible to read from the file the elements in which the name is the key for numbers in the HashMap ?

for example Adam is the key for 250 and 321.

If possible could you please show me how it can be done ?

CodePudding user response：

Sure, first create a class to hold the numerical values, this is usually called a Tuple.

public class Tuple<T, R> {
    private T valueA;
    private R valueB;

    public Tuple(T value1, R value2) {
        valueA = value1;
        valueB = value2;
    }

    public T getValueA() {
        return valueA;
    }

    public R getValueB() {
        return valueB;
    }

    @Override
    public String toString() {
        return "Tuple [valueA="   valueA   ", valueB="   valueB   "]";
    }
}

Then read your file and place into the map.

public static void main(String[] args) {
    Map<String, Tuple<Integer, Integer>> map = new HashMap<>();
    
    try(BufferedReader reader = new BufferedReader(new FileReader("/your/file/location"))) {
        String line = reader.readLine();
        while (line != null) {
            String [] values = line.split("\\s");
            map.put(values[0], new Tuple<Integer, Integer>(Integer.valueOf(values[1]), Integer.valueOf(values[2])));
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}