java方法调用问题

class test{
private static int j = 0;
private static boolean methodB(int k) {
      j += k;
       return true;
}
public static void methodA(int i) {
boolean b;
b = i < 10 |methodB (4);
b = i < 10 || methodB (8);
}
public static void main (String args[] ) {
methodA (1);
System.out.println(j);
}
}  为何j=4？
   请教！