public class Test01 {

    public static int ABC = 0;

    public void m() {
        int a;
        a = 0;
        int b = 0;
        if (a == 0) {
            a++;
            System.out.println(a);
        } else {
            a++;
            a = -b;
            System.out.println(a);
        }
        System.out.println(a);
        System.out.println(b);
    }
}