CompisitionExample.java

interface PoweredDevice {
  public void start();
}

class ScanOperation {
  public void perform() {
    // Performing scan operation
  }
}

class PrintOperation {
  public void perform() {
    // Perform print operation
  }
}

class Scanner implements PoweredDevice {
  private ScanOperation operation;

  public void start() {
    // Use operation.perform()
  }
}

class Printer implements PoweredDevice {
  private PrintOperation operation;

  public void start() {
    // Use operation.perform()
  }
}

class Copier implements PoweredDevice {
  private ScanOperation scanOperation;
  private PrintOperation printOperation;

  public void start() {
    // Use each operations
  }
}