How to convert String to numerical value in Java

Question

I'm working on my Neural Network project, and in data set I have only string values, but I know that NN accepts only numerical values so how can I convert string to double like this :

“red” =   0.4582932
“green” = 0.512932
“black” = 0.542123

Nope , I need represent String value = “black” like bunch off numerical for NN training , but I think I can deal with It , thx — mr DoubleTrue, May 19 '20 at 18:54

score 1 · Accepted Answer · answered May 19 '20 at 13:25

If the values are dynamic then use the solution that @ElliotFrisch provided in the question comments regarding the use of a Map of type String and Double respectively.

If the values are predetermined and do not change then an enumeration might be the solution for you.

enum Color {
    RED(0.4582932),
    GREEN(0.512932),
    BLACK(0.542123);

    private final double value;

    private Color(double value) {
        this.value = value;
    }
}

You could then create a Set of the enum values. ImmutableSet here.

private static final Set<Color> COLORS = ImmutableSet.copyOf(EnumSet.allOf(Color.class));

How to convert String to numerical value in Java

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