读代码:1. public interface Foo{2.int k = ...ne 2? (Choose Three)
举一反三
- 读代码: public class Test { public static void main (String args[]) { class Foo { public int i = 3; } Object o = (Object) new Foo(); Foo foo = (Foo)o; System.out.println(foo.i); } } 结果是:
- 下列代码中,( )行代码有错。 interface Com{ int Max; //1 public void stop(); //2 void start(); //3 abstract void loop();//4 } A: 1 B: 2 C: 3 D: 4
- Which two methods, inserted individually, correctly complete the Three class?() A: public void foo(){ } B: public int foo(){return 3;} C: public Two foo(){return this;} D: public One foo(){return this;} E: public Object foo(){return this;}
- Which code, inserted at line 15, allows the class Sprite to compile?() A: Foo{public int bar(){return 1;}} B: new Foo{public int bar(){return 1;}} C: new Foo(){public int bar(){return 1;}} D: new class Foo{public int bar(){return 1;}}
- 关于下列代码说法正确的是( ) public class Foo{ public int add(int a,int b){ return a+b; } public static void main(String[] args){ Foo foo = null; System.out.println(foo.add(10,20)); } }