Is it possible to create variables at runtime in Java?

Question

For example, say I wanted to \"extract\" String[] fruits = {\"Pear\", \"Banana\", \"Apple\"}; into three separate variables, eg:

for (int i=0; i         


        

Answer 1

Would Janino be useful for you?

Here's some code. I think it's close to what you want, but I'm not sure.

package misc;

import java.lang.reflect.InvocationTargetException;

import org.codehaus.janino.CompileException;
import org.codehaus.janino.ScriptEvaluator;
import org.codehaus.janino.Parser.ParseException;
import org.codehaus.janino.Scanner.ScanException;

public class JaninoExample {
public static void main(String[] args) {
    String in = " {\"Pear\", \"Banana\", \"Apple\"};";
    try {
        ScriptEvaluator se = new ScriptEvaluator("return new String[]"+in,String[].class);
        try {
            String[] fruits = (String[])se.evaluate(new Object[]{});
            for(String fruit:fruits){
                System.out.println(fruit);
            }
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    } catch (CompileException e) {
        e.printStackTrace();
    } catch (ParseException e) {
        e.printStackTrace();
    } catch (ScanException e) {
        e.printStackTrace();
    }

}

}