how to check an object is empty in java code example

Example 1: javascript check if object is empty

function isObjectEmpty(obj) {
    return Object.keys(obj).length === 0;
}

Example 2: check if object is empty java 8

Optional<Employee> employee = employeeServive.getEmployee();
// Sometimes an Employee has forgotten to write an up-to-date timesheet
Optional<Timesheet> timesheet = employee.flatMap(Employee::askForCurrentTimesheet); 
// We don't want to do the heavyweight action of creating a new estimate if it will just be discarded
client.bill(timesheet.orElseGet(EstimatedTimesheet::new));

Example 3: check if object is empty java 8

// Changed EmployeeServive to return an optional, no more nulls!
Optional<Employee> employee = employeeServive.getEmployee();
employee.ifPresent(e -> System.out.println(e.getId()));