从一个EJB引用另一个EJB（上）-4

最新推荐文章于 2024-10-07 22:36:56 发布

原创最新推荐文章于 2024-10-07 22:36:56 发布 · 954 阅读

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博客给出了复利计算代理测试客户端的代码。代码中包含多个import语句，定义了常量和变量，有获取输入字符串的方法。在main方法里，创建客户端对象，通过循环获取用户输入的起始余额、复利频率等信息，处理异常，最后计算并输出账户回报。

填写测试代码：（黑体部分）

package compoundinterestagent;

import java.io.*;

import javax.naming.*;

import java.util.Properties;

import javax.rmi.PortableRemoteObject;

import java.rmi.RemoteException;

public class CompoundInterestAgentTestClient

{

private static final String ERROR_NULL_REMOTE = "Remote interface reference is null. It must be created by calling one of the Home interface methods first.";

private static final int MAX_OUTPUT_LINE_LENGTH = 100;

private boolean logging = true;

private CompoundInterestAgentHome compoundInterestAgentHome = null;

private CompoundInterestAgent compoundInterestAgent = null;

private static BufferedReader in;

..................

private static String getInputString(String prompt)throws IOException

{

System.out.println(prompt);

return in.readLine();

}

//Main method

public static void main(String[] args)

{

CompoundInterestAgentTestClient client = new CompoundInterestAgentTestClient();

CompoundInterestAgent agent;

boolean valid;

String answer;

double tmpDbl=0.0;

int tmpInt=0;

in = new BufferedReader(new InputStreamReader(System.in));

try

{

agent=client.create();

System.out.println("/nWelcome to the Compound Interest Calculation:");

{

answer=getInputString("Enter a starting balance:$ ");

try

{

tmpDbl=Double.parseDouble(answer);

agent.setStartingBalance(tmpDbl);

valid=true;

}catch(NumberFormatException nfe)

{

System.out.println("Invalid Entry!");

valid=false;

}

}while(valid==false);

{

System.out.println("How often will the interest compound? ");

answer=getInputString("(1)monthly,(2)querterly,(3)semi_annually ");

try

{

tmpInt=Integer.parseInt(answer);

if(tmpInt>3)

throw new NumberFormatException();

agent.setFrequency(tmpInt);

valid=true;

}catch(NumberFormatException nfe)

{

System.out.println("Invalid Entry!");

valid=false;

}

}while(valid==false);

{

System.out.println("How much will you be contributing ");

switch(tmpInt)

{

case 1:

answer=getInputString("each month?");

break;

case 2:

answer=getInputString("each quarter?");

break;

case 3:

answer=getInputString("every six month?");

break;

}

try

{

tmpDbl=Double.parseDouble(answer);

agent.setContribution(tmpDbl);

valid=true;

}catch(NumberFormatException nfe)

{

System.out.println("Invalid Entry!");

valid=false;

}

}while(valid==false);

{

answer=getInputString("What is the ammount's annual yield? ");

try

{

tmpDbl=Double.parseDouble(answer);

agent.setAnnualYield(tmpDbl);

valid=true;

}catch(NumberFormatException nfe)

{

System.out.println("Invalid Entry!");

valid=false;

}

}while(valid==false);

{

answer=getInputString("How many years will you maintain this account?");

try

{

tmpInt=Integer.parseInt(answer);

agent.setTime(tmpInt);

valid=true;

}catch(NumberFormatException nfe)

{

System.out.println("Invalid Entry!");

valid=false;

}

}while(valid==false);

{

answer=getInputString("What rate of inflation rate are you anticipating? ");

try

{

tmpDbl=Double.parseDouble(answer);

agent.setInflation(tmpDbl);

valid=true;

}catch(NumberFormatException nfe)

{

System.out.println("Invalid Entry!");

valid=false;

}

}while(valid==false);

tmpDbl=agent.calculateReturn();

System.out.println("The return on this account would be $ "+tmpDbl);

}catch(RemoteException re)

{

re.printStackTrace();

}catch(IOException ioe)

{

ioe.printStackTrace();

}catch(Exception e)

{

e.printStackTrace();

}