Practical Applications
## Organizing Data with Java
Schools have lots of data—students, grades, classes. Java makes it easy to organize and search this information.
### What to Include
- Store student names, IDs, and grades.
- Add or remove students.
- Calculate average grades.
### Example Structure
```java
class Student {
String name;
int id;
double grade;
}
```
Use an `ArrayList<Student>` to manage all students.
## Why It Matters
This is how real school systems, libraries, and companies manage their data every day!
Examples
- Using an `ArrayList` to keep track of all enrolled students.
- Calculating class averages from student grade data.