### Question:
Code implements Serializable { @Override public boolean equals(Object obj){ if (obj instanceof Code) { Code other = (Code) obj; return other.getSystem().equals(this.system) && other.getCode().equals(this.code); } return false; } Code();  Code(String system, String code, String display);  Code(Code otherCode);  Code(Coding coding); static Code getNewCode(); String getSystem(); Code setSystem(String system); String getCode(); Code setCode(String code); String getDisplay(); Code setDisplay(String display); @Override boolean equals(Object obj); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void equals() { Code code1 = Code.getNewCode().setSystem("http: Code code2 = Code.getNewCode().setSystem("http: assertEquals(code1, code2); Code code3 = Code.getNewCode().setSystem("http: assertEquals(code1, code3); Code code4 = Code.getNewCode().setSystem("http: assertNotEquals(code1, code4); Code code5 = Code.getNewCode().setSystem("http: assertNotEquals(code1, code5); Code code6 = Code.getNewCode().setSystem("http: assertEquals(code1, code6); }