### Question:
Histogram implements Serializable { public void setT(Long t) { this.t = t; }  String getH(); void setH(String h); Long getT(); void setT(Long t);  }### Answer:
@Test public void setT() { Histogram hstm = new Histogram(); hstm.setT((long) 123456); assertEquals(123456L, hstm.getT(), 0); }