optional parameters

gistfile1.java

public void something(X x, Y y) {
  something(x, y, someDefaultValue);
}

public void something(X x, Y y, SomeObject object) {
  // do work
}

//  vs

public void something(X x, Y y, SomeObject... objects) {
  SomeObject object = object.length == 0 ? someDefaultValue : object[0];
  // do work
}