Am getting an error message of cannot find main class. Can anyone help

class Box {

double width;
double height;
double depth;
Box() {
}
Box(double w, double h, double d) {
width = w;
height = h;
depth = d;
}
void getVolume() {
System.out.println("Volume is : " + width * height * depth);
}
}

public class MatchBox extends Box {

double weight;
MatchBox() {
}
MatchBox(double w, double h, double d, double m) {
super(w, h, d);
weight = m;
}
public static void main(String args[]) {
MatchBox mb1 = new MatchBox(10, 10, 10, 10);
mb1.getVolume();
System.out.println("width of MatchBox 1 is " + mb1.width);
System.out.println("height of MatchBox 1 is " + mb1.height);
System.out.println("depth of MatchBox 1 is " + mb1.depth);
System.out.println("weight of MatchBox 1 is " + mb1.weight);
}
}

On my quick scan, one of your curly bracket is missing.

If you are using a good IDE, it should give you an indication

Your curly Brackets have issues... will run the code later and get back to you