对于下列代码，下列哪个叙述是正确的？ class A { public int i=0; A（int m) { i = 1; } } public

A、A

B、B

C、C

D、D

请说出E类中【代码1】~【代码4】的输出结果并分析原因。 class A { double f(double x,double y) { return x+y; } static int g(int n) { return n*n; } } class B extends A { double f(double x,double y) { double m = super.f(x,y); return m+x*y; } static int g(int n) { int m = A.g(n); return m+n; } } public class E { public static void main(String args[]) { B b = new B(); System.out.println(b.f(10.0,8.0)); //【代码1】 System.out.println(b.g(3)); //【代码2】 A a = new B(); System.out.println(a.f(10.0,8.0)); //【代码3】 System.out.println(a.g(3)); //【代码4】 } }

A、m1

B、m2

C、m3

D、fun

A、public class URLdomo{URL url;public URLdemo( )

{url=new URL("http","java.sun.com",8080,"doc1.html");}};

B、public class URLdomo{URL url;public URLdemo( )

{try{url=new URL("http","java.sun.com",8080,"doc1.html");}

catch(MalformedURLException e){ System.out.println("MalformedURLException");}}};

C、public class URLdomo{URL url;public URLdemo( )

{url=new URL("http://java.sun.com:8080/doc1.html");}};

D、public class URLdomo{URL url;public URLdemo( )

{try{url=new URL("http://java.sun.com:8080/doc1.html");}

catch(MalformedURLException e){ System.out.println("MalformedURLException");}}}

A、当编译时会发生错误

B、编译不会发生错误但执行是会发生错误

C、输出结果为0

D、不会输出结果

A、4

B、2

C、3

D、1