C. void my Fun(int XM1 D. void my Fun(int*X) 30.设 Derived类为Base类的子类,则如下对象的创建语句中那些是错误的? A. Base obj=new Derived; B. Derived Obj=new Base(; C. Base Obj=new Base D. Derived Obj=new Derived 31.运行下列程序,会产生什么结果 public class X extends Thread implements Runnable public void run(t System. out. printin(this is run(); public static void main(string args) Thread t=new Thread(new XO) t start A第一行会产生编译错误 B第大行会产生编译错误 C第六行会产生运行错误 D程序会运行和启动 32给定下列代码 1 class Parent ivate String name; 3 public Parent(t 4} 5 public class Child extends Parent 6 private String department 7 public Child t 8 public String getValue ((return name: 9 public static void main( String arg 10 Parent p= new Parento 上述代码的那些行将会导致错误? A. line 3 B. line 6C. void myFun(int X ){ } D. void myFun(int * X){ } 30. 设 Derived 类为 Base 类的子类，则如下对象的创建语句中那些是错误的？ A. Base Obj=new Derived(); B. Derived Obj=new Base()； C. Base Obj=new Base(); D. Derived Obj=new Derived(); 31. 运行下列程序, 会产生什么结果 public class X extends Thread implements Runnable{ public void run(){ System.out.println("this is run()"); } public static void main(String args[]) { Thread t=new Thread(new X()); t.start(); } } A 第一行会产生编译错误 B 第六行会产生编译错误 C 第六行会产生运行错误 D 程序会运行和启动 32. 给定下列代码： 1 class Parent { 2 private String name; 3 public Parent(){} 4 } 5 public class Child extends Parent { 6 private String department; 7 public Child() {} 8 public String getValue(){return name;} 9 public static void main(String arg[]){ 10 Parent p = new Parent(); 11 } 12 } 上述代码的那些行将会导致错误？ A. line 3 B. line 6