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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?()  import语句的作用是() Given a Filter class definition with this method: 21.public void doFilter(ServletRequest request, 22.ServletResponse response, 23.FilterChain chain) 24.throws ServletException, IOException { 25.// insert code here 26.} Which should you insert at line 25 to properly invoke the next filter in the chain, or the target servlet if thereare no more filters?() class Test2{   public static void main(String [] args){   boolean x=true;   boolean y=false;   short z=42;   if((x==true)&&y=true))z++;   if((y==true||++z=44))z++;   System.out.println(“z=”+z);  }  }   结果是什么?()   Your web page includes a Java SE v1.5 applet with the following declaration: 11. 13. 14. Which HTTP method is used to retrieve the applet code?() for循环的一般形式为:    for(初值;终值;增量)  一下对for循环的描述中,正确的是() A developer is designing a web application that makes many fine-grained remote data requests for eachclient request. During testing, the developer discovers that the volume of remote requests significantlydegrades performance of the application. Which design pattern provides a solution for this problem?() public class MethodOver  {  public void setVar (int a, int b, float c)  {  }  }   Which two overload the setVar method?()   假设有字符串“123”,能把该字符串变成整数的方法是哪几项?() 下面关于abstract关键字描述错误的是()。