As title says i whant to change my variables in java from my jruby code
To be more specific i have an integer in my Java code which has no value yet, And i whant with my JRuby code give this variable an value, But i have no idea how to do this.
This is how far i got with the JRuby code..
require 'java'
puts "Set player health here"
playerHealth = 3 # Setting player health here!
But have not yet wrote anything in java. This is pretty much all I have so far..
From what I understand, you are trying to invoke the JRuby engine from Java, so you could do something like this to modify a Java variable in JRuby:
import javax.script.*;
public class EvalJRubyScript {
public static void main(String[] args) throws Exception {
ScriptEngineManager factory = new ScriptEngineManager();
int playerHealth = 0;
ScriptEngine engine = factory.getEngineByName("jruby");
ScriptContext context = engine.getContext();
context.setAttribute("playerHealth", playerHealth, ScriptContext.ENGINE_SCOPE);
try {
engine.eval("$playerHealth = 42");
playerHealth = (Integer)context.getAttribute("playerHealth", ScriptContext.ENGINE_SCOPE);
System.out.println(playerHealth);
} catch (ScriptException exception) {
exception.printStackTrace();
}
}
}
Note that in the script playerHealth is a global variable.
Check out this link for more details if you want to load an external JRuby script rather than evaluating code.
