<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
Using Java, create a class constructor for a 3D vector.
<|im_end|>
<|im_start|>assistant
class Vector3D {
    double x; 
    double y;
    double z;
 
    Vector3D(double x, double y, double z) {
        this.x = x;
        this.y = y;
        this.z = z;
    }
}<|im_end|>
