[medium snippets] #medium #designPattern #ProxyPattern

RealImage.java

public class RealImage implements Image {
  private String fileName;
  
  public RealImage(String fileName){
    this.fileName = fileName;
    loadFromDisk(fileName);
  }
  
  @Override
  public void display() {
    System.out.println("Displaying " + fileName);
  }
  
  private void loadFromDisk(String fileName){
    System.out.println("Loading " + fileName);
  }
}