JRuby Bug

Component.java

class Component {
  private Integer id;
  public Integer getID() { return id; }
  public void setID(id) { this.id = id; }
}

Container.java

class Container {
  private Integer id;
  public Integer getID() { return id; }
  public void setID(id) { this.id = id; }
  
  private Integer pieceID;
  public Integer getPieceID() { return pieceID; }
  public void setPieceID(id) { this.pieceID = id; }
}

test_script.rb

component = Component.new
component = componentDao.update(component) # returns a new component, so somewhere in the Java code, the ID is being set

container = Container.new
container.setPieceID(component.getID) # fail on the setter
container.setPieceID(java.lang.Integer.new(component.getID)) # this works