Java one-liner for taking mean of two ints without overflow

GeneralAverage.java

import java.util.Random;

public class GeneralAverage {
    public static int mean(int a, int b) {
        return ((a<0) ^ (b<0)) ? (a + b) / 2 : (a%2 == 0 || b%2 == 0 ? a/2 + b/2 : a/2 + b/2 + ((a < 0) ? -1 : 1));
    }

    public static void main(String[] args) {
        Random rand = new Random();
        int a = Integer.MAX_VALUE;
        int b = Integer.MAX_VALUE - 1;

        for (int i = 0; i < 10000; i++) {
            int mean = mean(a, b);
            int actual = (int) (((long) a + (long) b) / 2);
            if (mean != actual) {
                System.out.println("(" + i + ") " + a + " " + b + " : " + mean + " " + actual);
                System.out.println("DOESN'T WORK!");
                break;
            }

            a = rand.nextInt(Integer.MAX_VALUE);
            b = rand.nextInt(Integer.MAX_VALUE);
        }

        a = Integer.MIN_VALUE;
        b = Integer.MAX_VALUE - 1;
        for (int i = 0; i < 10000; i++) {
            int mean = mean(a, b);
            int actual = (int) (((long) a + (long) b) / 2);
            if (mean != actual) {
                System.out.println("(" + i + ") " + a + " " + b + " : " + mean + " " + actual);
                System.out.println("DOESN'T WORK!");
                break;
            }

            a = - rand.nextInt(Integer.MAX_VALUE - 1);
            b = rand.nextInt(Integer.MAX_VALUE);
        }

        a = Integer.MIN_VALUE;
        b = Integer.MIN_VALUE + 1;
        for (int i = 0; i < 10000; i++) {
            int mean = mean(a, b);
            int actual = (int) (((long) a + (long) b) / 2);
            if (mean != actual) {
                System.out.println("(" + i + ") " + a + " " + b + " : " + mean + " " + actual);
                System.out.println("DOESN'T WORK!");
                break;
            }

            a = - rand.nextInt(Integer.MAX_VALUE - 1);
            b = - rand.nextInt(Integer.MAX_VALUE - 1);
        }
    }
}

PositiveAverage.java

import java.util.Random;

/*
 * Only works for positive ints.
 */
public class PositiveAverage {
    public static int mean(int a, int b) {
        return (a % 2 == 0 || b % 2 == 0) ? (a / 2 + b / 2) : (a / 2 + b / 2 + 1);
    }

    public static void main(String[] args) {
        Random rand = new Random();
        int a = Integer.MAX_VALUE;
        int b = Integer.MAX_VALUE - 1;

        for (int i = 0; i < 10000; i++) {
            int mean = mean(a, b);
            int actual = (int) (((long) a + (long) b) / 2);
            if (mean != actual) {
                System.out.println("(" + i + ") " + a + " " + b + " : " + mean + " " + actual);
                System.out.println("DOESN'T WORK!");
                break;
            }

            a = rand.nextInt(Integer.MAX_VALUE);
            b = rand.nextInt(Integer.MAX_VALUE);

        }

    }
}