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setContentView in Activity getWindow().setContentView(layoutResID); initWindowDecorActionBar(); }The setContentView method is as follows. It calls setContentView in the window, but the setContentView in the window is only an abstract method:public abstract void setContentView(View view, ViewGroup.LayoutParams params);At the beginning of ...

Hello, I'm architecture Jun, an architect who can write code and recite poetry. Today, let's talk about the "suggestions collection" of Springboot integrated ehcache cache. I hope it can help you make progress!!!EhCache is a relatively mature Java cache framework, which was first developed from hibernate. It is an in-process cache sys ...

Unit 8: time series analysis in Google Earth engine 1 Introduction In this module, we will discuss the following concepts: Process remote sensing images of the ocean. Create a video from an image time series. Time series analysis in GEE. Add basic elements to the graphical user interface. 2 background The Deepwat ...

1, BackgroundLambda expressions in Java 8 are no longer a "new feature". Many people now use Lambda expressions in their work. But do you really understand the underlying principles of Lambda expressions?This paper gives its own understanding, hoping to be helpful to you.2, AnalysisThe following is a very simple code, which uses Str ...

1, BackgroundMany companies have certain requirements for branch single test coverage. For example, the single test coverage must reach 60% or 80% before it can be released.Sometimes the construction period is relatively tight, so we give priority to developing functions and testing functions, and then supplement unit testing.However, writing u ...

1, BackgroundWhen we write unit tests, we occasionally need to obtain the contents of the logger output of the tested object for assertion or troubleshooting through unit tests.For example: (1) You need to Assert that a log has been output (you can't just change the output object to the Appender of Console, output it to the Console to view the ...

Generics play an important role in java, which can be seen in both open source framework and JDK source code. It is no exaggeration to say that generics are essential elements in general design, so it is a required course to truly understand and correctly use generics. 1: Generic essence Java generics is a new feature introduced in JDK 5. ...

Carry out unified authentication through authentication service, and then verify authentication and authentication through gateway. Nacos will be used as the registration center, Gateway as the Gateway, and nimbus Jose JWT JWT library will be used to operate JWT tokens Theoretical introduction Spring Security is powerful and easy to ...

Task content By adjusting PID and LQR controller to realize stable hovering of multi rotor aircraft, it is applied in both simulation and actual system. Reference content Basic reference content of LQR control part: LQR controller Reference link: Linear Quadratic Regulator (LQR) With Python Code Example design scheme A: Altitude and yaw ...

catalogue 1, What are built-in objects 2, Query document 2.1 MDN 2.2 how to learn methods in objects 3, Math object 3.1 Math overview 3.1.1 case exercise - encapsulating your own Math object 3.1.2 absolute value of math and three rounding methods 3.2 random number method (random) 3.2.1 case exercise - get a random number between two n ...