Ok guys,

Here is a challange for you :D.
The GOAL is to make a single separate .java file that calls CubicRootChallenge.checkCubicRoot() and is able to get true.

You are not able to use reflection.

import java.math.BigInteger;
import java.security.SecureRandom;
 
/**
 * RULES:
 *
 * <p>1. Write a class that by calling CubicRootChallenge.checkCubicRoot(), is able to reach the *GOAL* line
 *
 * <p>2. Solve the problem in a single separate .java file which compiles and runs with JDK 6/7/8
 *
 * <p>3. Your code must run with the security manager enabled (java -Djava.security.manager your.Class)
 *
 *
 */
public class CubicRootChallenge {
 
        // Number of BITS for the number
        public static final int BITS = 10000;
 
        // Generate random number with said bits [0 <--> 2^BITS - 1], and elevates it ^3
        private static final BigInteger NUMBER = new BigInteger(BITS, new SecureRandom()).pow(3);
 
        // Methods that prints out when passed BigInteger is cubic root of NUMBER
        public static void checkCubicRoot(BigInteger numberToTest) {
 
                // Check if numberToTest is cubic root of NUMBER
                if (NUMBER.divide(numberToTest).divide(numberToTest).equals(numberToTest)) {
 
                        // THE GOAL IS TO REACH THIS LINE!
                        System.out.println("YOU WIN!");
                }
        }
}

public class Wat {
	public static void main(String[] args) {
		CubicRootChallenge.checkCubicRoot(new BigInteger("1"));
		System.out.println("YOU WIN!");
	}
}

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    public class CubicRootChallenge {
        public static boolean checkCubicRoot() {
            return true;
        }
    } 

public class Wat {
    public static void main( String[] arg ) {
        //I'll take my prize now ;)
        CubicRootChallenge.checkCubicRoot();
    }
}

Ooo can somebody explain deftware's code? I didn't know .java files can look like that (looks like some kind of assembly?). How does it call checkCubicRoot? Also Mr L, are you accepting trick answers or are you really looking for a specific mathy solution?

public static void main(String[] args) {
    while (true) {
        CubicRootChallenge.checkCubicRoot(new BigInteger(CubicRootChallenge.BITS, new SecureRandom()));
    }
}