如何编译几个相互依赖的Java文件?

我有很少的Java文件。主文件使用picture.java文件中的picture类。我想知道如何从命令行编译和运行main?

这里是main.java

package com.company;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class Main {
    static Picture slika = null; // Picture class ???

    public static void main(String[] args) {
        long t1, t2;
        String name = "mede.jpg";

        slika = new Picture(name);
        t1 = System.nanoTime();

        slika.new_img = meanFilter(slika.img);

        t2 = System.nanoTime();
        slika.writeImage();
        calculateTime(t1, t2);
    }

picture.java网站

...
public class Picture {

    public BufferedImage img;
    public BufferedImage new_img;
    ...