Interpret the technical principles and design ideas of the smooth date in the Java library
The smooth dated builder is a framework for handling the date and time. It provides a smooth and easy -to -use way to build and operate the date object.The technical principles and design ideas of this framework are relatively simple, but it is very practical and convenient.
The design idea of the smooth date constructor is based on the programming paradigm of the method chain, and uses continuous methods to build the date object.In this way, you can set the date, month, day, time, time, time, and seconds of the date and method in the established order and method to flexibly create the date object.
The key to achieving a smooth dated builder in the Java library is to use the matching of the method chain and the return type.Each method returns itself (this) so that the method can be continuously called in a chain call without repeated reference objects.This design can simplify the writing of code, improve the readability and maintenance of the code.
The following is an example code of a simple smooth date constructor:
public class FluentDateBuilder {
private LocalDateTime date;
private FluentDateBuilder(LocalDateTime date) {
this.date = date;
}
public static FluentDateBuilder now() {
return new FluentDateBuilder(LocalDateTime.now());
}
public FluentDateBuilder year(int year) {
date = date.withYear(year);
return this;
}
public FluentDateBuilder month(int month) {
date = date.withMonth(month);
return this;
}
public FluentDateBuilder day(int day) {
date = date.withDayOfMonth(day);
return this;
}
public FluentDateBuilder hour(int hour) {
date = date.withHour(hour);
return this;
}
public FluentDateBuilder minute(int minute) {
date = date.withMinute(minute);
return this;
}
public FluentDateBuilder second(int second) {
date = date.withSecond(second);
return this;
}
public LocalDateTime build() {
return date;
}
}
In the above code, the `FluentDateBuilder` class contains a series of methods for setting the date and time attribute. Each method returns the object itself.Through these methods of chain calls, the date object can be easily constructed.Finally, return the final `localDateTime` object to the final` build () `method.
The sample code of the use of the smooth date builder is as follows:
LocalDateTime dateTime = FluentDateBuilder.now()
.year(2022)
.month(1)
.day(1)
.hour(12)
.minute(0)
.second(0)
.build();
In the above code, we first call the `NOW ()` method to get the current date time, and then set the year, month, day, time, time, time, and second attributes, and finally build a completeDate object.
The advantage of the smooth date constructifier is that it can improve the readability and maintenance of the code, and at the same time, it can also reduce the amount of code writing.By using the method chain, the construction and setting of the date object can be completed in a line of code.
In short, the smooth date constructor is a convenient and practical framework. The use method chain is used to build and operate the date object, optimize the code writing method, so that the processing date and time become simpler and flexible.
