Create an application named StudentsStanding.java that allows you to enter student data that consists of an ID number, first name, last name, and grade point average. Have the program accept input until ZZZ is entered for the ID number. Depending on whether the student’s grade point average is at least 2.0, output each record either to a file of students in good standing or those on academic probation. Create an application named StudentsStanding2.java that displays each record in the two files created in the StudentsStanding application. Display a heading to introduce the list produced from each file. For each record, display the ID number, first name, last name, grade point average, and the amount by which the grade point average exceeds or falls short of the 2.0 cutoff. For example, the output should be formatted as follows (note that the student info may vary): Probationary Standing ID #10  Mike Green  GPA: 1.9  -0.10000000000000009 from 2.0 cutoff Good Standing ID #100  Jill Green  GPA: 2.0  0.0 from 2.0 cutoff ID #50  Jane Doe  GPA: 3.7  1.7000000000000002 from 2.0 cutoff

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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  1. Create an application named StudentsStanding.java that allows you to enter student data that consists of an ID number, first name, last name, and grade point average. Have the program accept input until ZZZ is entered for the ID number. Depending on whether the student’s grade point average is at least 2.0, output each record either to a file of students in good standing or those on academic probation.

  2. Create an application named StudentsStanding2.java that displays each record in the two files created in the StudentsStanding application. Display a heading to introduce the list produced from each file. For each record, display the ID number, first name, last name, grade point average, and the amount by which the grade point average exceeds or falls short of the 2.0 cutoff. For example, the output should be formatted as follows (note that the student info may vary):

Probationary Standing

ID #10  Mike Green  GPA: 1.9  -0.10000000000000009 from 2.0 cutoff

Good Standing

ID #100  Jill Green  GPA: 2.0  0.0 from 2.0 cutoff

ID #50  Jane Doe  GPA: 3.7  1.7000000000000002 from 2.0 cutoff

 

```java
import java.nio.file.*;
import java.io.*;
import static java.nio.file.StandardOpenOption.*;

public class StudentsStanding2 {
    public static void main(String[] args) {
        Path goodFile = Paths.get("/root/sandbox/StudentsGoodStanding.txt");
        Path probFile = Paths.get("/root/sandbox/StudentsAcademicProbation.txt");

        // Write your code here
    }

    public static void display(String s) {
        // Write your code here
    }
}
```

**Explanation:**

This Java program, `StudentsStanding2`, involves handling text files related to student standings. It imports necessary classes for file operations.

- `main` Method:
  - Initializes two `Path` objects, `goodFile` and `probFile`, pointing to `StudentsGoodStanding.txt` and `StudentsAcademicProbation.txt`, respectively. These files presumably contain lists of students in good standing and those on academic probation.

- `display` Method:
  - This method is intended to accept a `String` parameter `s` and perform operations defined later in the code.

The code contains placeholders to implement file manipulation and data processing. It suggests adding code for reading, manipulating, and displaying data related to student standings.
Transcribed Image Text:```java import java.nio.file.*; import java.io.*; import static java.nio.file.StandardOpenOption.*; public class StudentsStanding2 { public static void main(String[] args) { Path goodFile = Paths.get("/root/sandbox/StudentsGoodStanding.txt"); Path probFile = Paths.get("/root/sandbox/StudentsAcademicProbation.txt"); // Write your code here } public static void display(String s) { // Write your code here } } ``` **Explanation:** This Java program, `StudentsStanding2`, involves handling text files related to student standings. It imports necessary classes for file operations. - `main` Method: - Initializes two `Path` objects, `goodFile` and `probFile`, pointing to `StudentsGoodStanding.txt` and `StudentsAcademicProbation.txt`, respectively. These files presumably contain lists of students in good standing and those on academic probation. - `display` Method: - This method is intended to accept a `String` parameter `s` and perform operations defined later in the code. The code contains placeholders to implement file manipulation and data processing. It suggests adding code for reading, manipulating, and displaying data related to student standings.
This Java code snippet is designed for managing student standing information, specifically handling files for students in good standing and those on academic probation.

```java
import java.nio.file.*;
import java.io.*;
import static java.nio.file.StandardOpenOption.*;
import java.util.Scanner;
import java.nio.channels.FileChannel;

public class StudentsStanding {
    public static void main(String[] args) {
        Path goodFile = Paths.get("/root/sandbox/StudentsGoodStanding.txt");
        Path probFile = Paths.get("/root/sandbox/StudentsAcademicProbation.txt");

        // Write your code here
    }
}
```

### Explanation:

1. **Imports:**
   - `java.nio.file.*`: Provides classes for file and path operations.
   - `java.io.*`: Includes classes for input and output operations.
   - `java.util.Scanner`: Used to read input from files.
   - `java.nio.channels.FileChannel`: Supports reading, writing, mapping, and manipulating a file’s contents.

2. **Class Definition:**
   - `public class StudentsStanding`: This is the main class that will handle the operations related to student files.

3. **Main Method:**
   - `public static void main(String[] args)`: The entry point of the program.

4. **Path Initialization:**
   - `Path goodFile`: This variable holds the path to the file containing information about students in good standing.
   - `Path probFile`: This variable holds the path to the file with information about students on academic probation.

5. **Comment Placeholder:**
   - `// Write your code here`: Indicates where additional code should be written to implement specific functionalities, such as reading from or writing to the files.

### Intended Use:

This setup is prepared for reading and writing operations on two specific text files related to student status. The code provides the basic structure, while further logic should be added to perform detailed operations, such as updating or retrieving student records.
Transcribed Image Text:This Java code snippet is designed for managing student standing information, specifically handling files for students in good standing and those on academic probation. ```java import java.nio.file.*; import java.io.*; import static java.nio.file.StandardOpenOption.*; import java.util.Scanner; import java.nio.channels.FileChannel; public class StudentsStanding { public static void main(String[] args) { Path goodFile = Paths.get("/root/sandbox/StudentsGoodStanding.txt"); Path probFile = Paths.get("/root/sandbox/StudentsAcademicProbation.txt"); // Write your code here } } ``` ### Explanation: 1. **Imports:** - `java.nio.file.*`: Provides classes for file and path operations. - `java.io.*`: Includes classes for input and output operations. - `java.util.Scanner`: Used to read input from files. - `java.nio.channels.FileChannel`: Supports reading, writing, mapping, and manipulating a file’s contents. 2. **Class Definition:** - `public class StudentsStanding`: This is the main class that will handle the operations related to student files. 3. **Main Method:** - `public static void main(String[] args)`: The entry point of the program. 4. **Path Initialization:** - `Path goodFile`: This variable holds the path to the file containing information about students in good standing. - `Path probFile`: This variable holds the path to the file with information about students on academic probation. 5. **Comment Placeholder:** - `// Write your code here`: Indicates where additional code should be written to implement specific functionalities, such as reading from or writing to the files. ### Intended Use: This setup is prepared for reading and writing operations on two specific text files related to student status. The code provides the basic structure, while further logic should be added to perform detailed operations, such as updating or retrieving student records.
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