天鸣科技笔试

1下例代码输出结果？

class test{
 public static void main(){
  System.out.println("Hello World"):
 }

Exception in thread "main" java.lang.NoSuchMethodError: main

 

class test{
 public static void main(String [] args){
  System.out.println("Hello World"):
 }

 

Hello World

 

2下例代码输出结果？

class A{}
class B extends A {}
class C extends A {}

public class test01{
 public static void main(String [] args){
  A a = new A();
  B b = new B();
  C c = new C();
  a = (B)c;
 
}

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