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标题: 英文作业：IO流读取txt文件，并计算最高分文件复制查找 [打印本页]

作者: java无忧网 时间: 2018-11-1 13:16
标题: 英文作业：IO流读取txt文件，并计算最高分文件复制查找

Assignment #8

The records of the students enrolled in a hypothetical computer science class, along with all the relevant information, are kept in the data file classLis.txt

Design and implement a java application to facilitate access to the student records.

The following is a screen sample of the program:

Please enter:

1. To display a specific student’s record.

2. To calculate the final exam average.

3. To find a student with the highest score on the final exam.

4. To copy the students’ record to another file.

5. To terminate the program.

Please enter the student’s name: Annette Adams

Name: Annette Adams

ID: 18273640

Final: 98

Please enter:

1. To display a specific student’s record.

2. To calculate the final exam average.

3. To find a student with the highest score on the final exam.

4. To copy the students’ record to another file.

5. To terminate the program.

Please enter the student’s name: Mark Smith

No match

Please enter:

1. To display a specific student’s record.

2. To calculate the final exam average.

3. To find a student with the highest score on the final exam.

4. To copy the students’ record to another file.

5. To terminate the program.

The final exam average is: 80.43478

Please enter:

1. To display a specific student’s record.

2. To calculate the final exam average.

3. To find a student with the highest score on the final exam.

4. To copy the students’ record to another file.

5. To terminate the program.

The student with highest score to the final exam:

Name: Aleksei Titov

ID: 92839443

Final exam score: 99

Please enter:

1. To display a specific student’s record.

2. To calculate the final exam average.

3. To find a student with the highest score on the final exam.

4. To copy the students’ record to another file.

5. To terminate the program.

Please enter the file name:

ClassListCopy.txt

Please enter:

1. To display a specific student’s record.

2. To calculate the final exam average.

3. To find a student with the highest score on the final exam.

4. To copy the students’ record to another file.

5. To terminate the program.

Program terminates

The classList.txt file has been created for you.

Marking Scheme

[2 marks] Presentation/Style: Organization, readability, descriptive identifier,

indentation, bracket placement

[16 marks] Correctness: Program works without bugs. Use of appropriate methods.

[2 marks] Comments

此源码经过详细测试保证能运行！！！

下载地址：

**** 本内容需购买 ****

作者: 让行动证明一切 时间: 2018-11-18 14:50
英文作业：IO流读取txt文件，并计算最高分文件复制查找

报空指针异常：
Exception in thread "main" java.lang.NullPointerException
at java.io.Reader.<init>(Unknown Source)
at java.io.InputStreamReader.<init>(Unknown Source)
at a8.main(a8.java:23)

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