下面程序的运行结果为哪个? class Parent { void printMe() { System.out.println("parent"); } } class Child extends Parent { void printMe( ) { System.out.println("child"); } void printAll( ) { super.printMe( ); this.printMe( ); printMe( ); } } public class Test { public static void main(String[ ] args) { Child myC=new Child( ); myC.printAll( ); } }