Where are basic data types usually placed in a class structure?

In a Java class, primitive data types (such as int, double, boolean) are usually declared in the fields section of the class, that is, at the beginning of the class body, before the methods. This allows you to see all the properties of the object immediately. Typically, the class structure looks like this:

public class Example {
    // Fields (including primitive data types)
    private int id;
    private double value;
    private boolean isActive;

    // Constructors
    public Example(int id, double value, boolean isActive) {
        this.id = id;
        this.value = value;
        this.isActive = isActive;
    }

    // Methods
    public int getId() {
        return id;
    }
    // ... other methods
}

Thus, primitive data types are placed at the beginning of the class as fields, which ensures ease of reading and maintaining the code.