5 design patterns every Android developer should know - Builder pattern

Ship.java

public class Ship {
    
  private String name;
  private String area;
  private int guns;
  private int crew;
  private String radarType;
    
  //normal getters
  public String getName() {
    return name;
  }

  public String getArea() {
    return area;
  }

  public int getGuns() {
    return guns;
  }

  public int getCrew() {
    return crew;
  }

  public String getRadarType() {
    return radarType;
  }
    
  //private setters, we're using them to set fields in the builder
  private void setRadarType(String radarType) {
    this.radarType = radarType;
  }

  private void setName(String name) {
    this.name = name;
  }

  private void setArea(String area) {
    this.area = area;
  }

  private void setGuns(int guns) {
    this.guns = guns;
  }

  private void setCrew(int crew) {
    this.crew = crew;
  }
    
  //the Builder class
  public static class Builder {
      
    private Ship ship;

    public Builder() {
      ship = new Ship();
    }

    public Builder setName(String name){
      ship.setName(name);
      return this;
    }

    public Builder howManyGuns(int guns){
      ship.setGuns(guns);
      return this;
    }

    public Builder setOperationArea(String area){
      ship.setArea(area);
      return this;
    }

    public Builder howManyCrew(int crew){
      ship.setCrew(crew);
      return this;
    }

    public Builder radarType(String radarType){
      ship.setRadarType(radarType);
      return this;
    }
      
    //method to expose the created object
    public Ship build(){
      return ship;
    }

  }


}