[medium snippets] #medium #designPattern #StatePattern

MP3PlayerContext.java

public class MP3PlayerContext {
  private State state;
  
  public MP3PlayerContext() {
    this.state = new StandbyState();
  }
  
  public void press() {
    state.pressPlay(this);
  }
  
  public void setState(State state) {
    this.state = state;
  }
  
  public void getState() {
    System.out.println(state.getState());
  }
}