How do i assign my Class variable from a String/build Object from String

Question

I have a Class that needs to be return a Object built from a String and im not sure whats best to use for my situation.

my string comes in as JSONString and i am splittig it to get key value pairs that look like this. variable = "x" value = 60%

public class Math {
    public String x = "";
    public String y = "";

Solution 1: this is working but im not able to cast it into class.

String variable = keyVal[0];
String value = keyVal[1];
Map m = new HashMap();
m.put(variable, value);

Solution 2: I need to reference to Math.x via the variables value but thats not working

String variable = keyVal[0];
String value = keyVal[1];
Math c = new Math();
c.variable = value;

Does this answer your question? [How to parse JSON in Java](https://stackoverflow.com/questions/2591098/how-to-parse-json-in-java) — KYL3R, Oct 20 '21 at 08:01

score 1 · Accepted Answer · answered Oct 20 '21 at 07:59

String variable = keyVal[0];
String value = keyVal[1];
Math c = new Math();
c.variable = value;

I think you mean:

String variable = keyVal[0];
String value = keyVal[1];
Math c = new Math();
if(variable.equals("x") {
    c.x = value
}
if(variable.equals("y") {
    c.y = value
}

You need to do some kind of case distinction, it's not possible to take a String and use it to dynamically determine which field to write to (ok with Reflection it is possible but that would be even more complicated).

How do i assign my Class variable from a String/build Object from String

1 Answers1