Insertion of float value into a Jsonobject

Question

I have the following situation, I have an object called Item, with a value variable in it. At the time I enter the value in the json object it changes from 1 or 2 boxes after the comma to 15 boxes after the comma.

Ex: the value is 8.9 and changes to 8.899999618530273 when placed in json.

Item:

public class Item {
    private float valor;

    public void setValor(float valor) {
        this.valor = v;
    }
    public float getValor() {
        return this.valor;
    }
}


JSONObject obj = new JSONObject();
float v = item.getValor();  // --> Aqui o valor de 'v' é 8.9
obj.put("Valor", v);   // --> Aqui após inserido no json, olhando no debugger o valor já é 8.899999618530273
...

I don’t know if that’s a normal thing JSONOBbject but causes data inconsistency.

Has some way of making the value the same as the model?

Answer 1

One way would be to convert your float to String by formatting the decimals and using the constructor Jsonobject(String) to pass the value

Following example:

float v = item.getValor();
JSONObject obj = new JSONObject(String.format("{\"Valor\": %.2f}", v);

Another way would be by converting to String and passing via put method

 obj.put("Valor", (String.format("%.2f", v)));