The charAt（） method of the String class.
The toUpperCase（） method of the String class.
The replace（） method of the String class.
The reverse（） method of the StringBuffer class.
The length（） method of the StringBuffer class.
第1题：
You are creating a Windows Communication Foundation (WCF) service that implements operations in a RESTful manner. You need to add a delete operation. You implement the delete method as follows:void DeleteItems(string id);You need to configure WCF to call this method when the client calls the service with the HTTP DELETE operation. What should you do?（）
A. Add the WebInvoke(UriTemplate="/Items/{id}", Method="DELETE") attribute to the operation
B. Add the HttpDelete atribute to the operation
C. Replace the string parameter with a RemovedActivityAction parameter
D. Replace the return type with RemovedActivityAction.
第2题：
public class CreditCard { private String cardlD； private Integer limit； public String ownerName； public void setCardlnformation（String cardlD， String ownerName， 28. Integer limit） { this.cardlD = cardlD； this.ownerName = ownerName； this.limit = limit； } } Which is true？（）
第3题：
A、(1)和(2)删掉一个，错误解决
B、(3)删掉，错误解决
C、没问题
第4题：
A programmer needs to create a logging method that can accept an arbitrary number of arguments. For example， it may be called in these ways： logIt（”log message 1 “）； logIt（”log message2”，”log message3”）； logIt（”log message4”， “log message5”， “log message6）； Which declaration satisfies this requirement？（）
第5题：
You are creating a Windows Communication Foundation （WCF） service that implements operations in a RESTful manner.You need to add a delete operation. You implement the delete method as follows. string void DeleteItems（string id）；You need to configure WCF to call this method when the client calls the service with the HTTP DELETE operation. What should you do？（）
第6题：
A method returning length of the String.
第7题：
public String makinStrings（） { String s = “Fred”； s = s + “47”； s = s.substring（2， 5）； s = s.toUpperCase（）； return s.toString（）； } How many String objects will be created when this method is invoked？（）
第8题：
You are writing a method that accepts a string parameter named message.Your method must break the message parameter into individual lines of text and pass each line to a second method named Process.Which code segment should you use?（）
A.
B.
C.
D.
第9题：
Which statements concerning the methods notify（） and notifyAll（） are true？
第10题：
Under which circumstances will a thread stop？（）