热门试题
A web browser need NOT always perform a complete request for a particular page that it suspects mightNOT have changed. The HTTP specification provides a mechanism for the browser to retrieve only a partialresponse from the web server; this response includes information, such as the Last-Modified date but NOTthe body of the page. Which HTTP method will the browser use to retrieve such a partial response?() For a given Servlet Response response, which two retrieve an object for writing text data? () 如果想要一个类不能被任何类继承的话,需要使用哪个关键字来修饰该类?()  public static Iterator reverse(List list) {  Collections.reverse(list);  return list.iterator();  }  public static void main(String[] args) {  List list = new ArrayList();  list.add(” 1”); list.add(”2”); list.add(”3”);  for (Object obj: reverse(list))  System.out.print(obj + “,”);  }  What is the result?()  public class X {   public static void main (Stringargs) {   string s = new string (“Hello”);   modify(s);   System.out.printIn(s);   }   public static void modify (String s) {   s += “world!”;   }   }   What is the result?()  以下关于File类的叙述,哪两项正确?()   下面的哪些声明是合法的?() A developer is designing a web application that must verify for each request: The originating request is froma trusted network. The client has a valid session.The client has been authenticated. Which design pattern provides a solution in this situation?() 1. public class A {  2.  3. private int counter = 0;  4.  5. public static int getInstanceCount() {  6. return counter;  7. }  8.  9. public A() {  10. counter++;  11. }  12.  13. }  Given this code from Class B:  25.A a1 =new A();  26. A a2 =new A();  27. A a3 =new A();  28. System.out.printIn(A.getInstanceCount() ); What is the result?()  public class Yippee2 {  static public void main(String [] yahoo) {  for(int x= 1; xSystem.out.print(yahoo[x] + “ “);  }  }  }  and the command line invocation: java Yippee2 a b c What is the result?()