//举例一：异常逻辑处理例子
Object obj = getObj();
if (obj != null) {//do something
}else{//do something
}//举例二：状态处理例子
Object obj = getObj();
if (obj.getType == 1) {//do something
}else if (obj.getType == 2) {//do something
}else{//do something
}

double disablityAmount(){if(_seniority < 2) return 0;if(_monthsDisabled > 12)return 0;if(_isPartTime)return 0;//do somethig}

double disablityAmount(){if(_seniority < 2 || _monthsDisabled > 12 || _isPartTime) return 0;//do somethig
}

double getPayAmount(){double result;if(_isDead) {result = deadAmount();}else{if(_isSeparated){result = separatedAmount();}else{if(_isRetired){result = retiredAmount();else{result = normalPayAmount();}}}return result;

double getPayAmount(){if(_isDead) return deadAmount();if(_isSeparated)return separatedAmount();if(_isRetired)return retiredAmount();return normalPayAmount();
}

public double getAdjustedCapital(){double result = 0.0;if(_capital > 0.0 ){if(_intRate > 0 && _duration >0){resutl = (_income / _duration) *ADJ_FACTOR;}}return result;
}

public double getAdjustedCapital(){if(_capital <= 0.0 ){return 0.0;}if(_intRate > 0 && _duration >0){return (_income / _duration) *ADJ_FACTOR;}return 0.0;
}

public double getAdjustedCapital(){if(_capital <= 0.0 ){return 0.0;}if(_intRate <= 0 || _duration <= 0){return 0.0;}return (_income / _duration) *ADJ_FACTOR;
}

   /* 查找年龄大于18岁且为男性的学生列表 */public ArrayList<Student> getStudents(int uid){ArrayList<Student> result = new ArrayList<Student>();Student stu = getStudentByUid(uid);if (stu != null) {Teacher teacher = stu.getTeacher();if(teacher != null){ArrayList<Student> students = teacher.getStudents();if(students != null){for(Student student : students){if(student.getAge() > = 18 && student.getGender() == MALE){result.add(student);}}}else {logger.error("获取学生列表失败");}}else {logger.error("获取老师信息失败");}} else {logger.error("获取学生信息失败");}return result;}

   /* 查找年龄大于18岁且为男性的学生列表 */public ArrayList<Student> getStudents(int uid){ArrayList<Student> result = new ArrayList<Student>();Student stu = getStudentByUid(uid);if (stu == null) {logger.error("获取学生信息失败");return result;}Teacher teacher = stu.getTeacher();if(teacher == null){logger.error("获取老师信息失败");return result;}ArrayList<Student> students = teacher.getStudents();if(students == null){logger.error("获取学生列表失败");return result;}for(Student student : students){if(student.getAge() > 18 && student.getGender() == MALE){result.add(student);}}return result;}

double getPayAmount(){Object obj = getObj();double money = 0;if (obj.getType == 1) {ObjectA objA = obj.getObjectA();money = objA.getMoney()*obj.getNormalMoneryA();}else if (obj.getType == 2) {ObjectB objB = obj.getObjectB();money = objB.getMoney()*obj.getNormalMoneryB()+1000;}
}

double getPayAmount(){Object obj = getObj();if (obj.getType == 1) {return getType1Money(obj);}else if (obj.getType == 2) {return getType2Money(obj);}
}double getType1Money(Object obj){ObjectA objA = obj.getObjectA();return objA.getMoney()*obj.getNormalMoneryA();
}double getType2Money(Object obj){ObjectB objB = obj.getObjectB();return objB.getMoney()*obj.getNormalMoneryB()+1000;
}

double getSpeed(){switch(_type){case EUROPEAN:return getBaseSpeed();case AFRICAN:return getBaseSpeed()-getLoadFactor()*_numberOfCoconuts;case NORWEGIAN_BLUE:return (_isNailed)?0:getBaseSpeed(_voltage);}
}

class Bird{abstract double getSpeed();
}class European extends Bird{double getSpeed(){return getBaseSpeed();}
}class African extends Bird{double getSpeed(){return getBaseSpeed()-getLoadFactor()*_numberOfCoconuts;}
}class NorwegianBlue extends Bird{double getSpeed(){return (_isNailed)?0:getBaseSpeed(_voltage);}
}