分析并给出下列程序的运行输出结果：class Shape { private static int i; protected static int j=10; Shape () { System.out.println ("i = " + i + ", j = " + j); j = 5; } private static int x1 = printInit("private Shape.x1 initialized"); static int printInit(String s) { System.out.println (s); return ++i; }}public class Circle extends Shape { int k = printInit("Circle.k initialized"); public Circle () { System.out.println ("k = " + k); System.out.println ("j = " + j); System.out.println ("x2 = " + x2); super.printInit("super"); } public static int x2 = printInit("public Circle.x2 initialized"); public static void main(String[] args) { System.out.println ("Circle constructor"); Circle b = new Circle (); System.out.println ("b.k="+b.k); }}