Programmer Think

catalogue 1, Concept of array (including some shortcut key usage) 2, Two dimensional array III. Arrays tools 4, Array exception 1, Concept of array (including some shortcut key usage) A collection of multiple data of the same type arranged in a certain order 1. Characteristics of array: 1) orderly arrangement 2) the array is a varia ...

1. What is Shell Shell is a command line interpreter. It is a black window. When we issue some commands to Linux, Shell translates these commands into the actions that kernel can understand, then calls the kernel, operates the hardware, completes the operation, and then translates the signals into adult understandable forms. Shell is also a p ...

Hello, everyone~ Internet plus era, business digitization has spread to every industry you can think of. There are more and more business functions and marketing methods, and the system is more and more complex. In the face of increasingly complex business systems, the brain is less and less used So smart people put forward the design idea ...

Process oriented & object oriented Process oriented thought The steps are clear and simple. What to do in the first step and what to do in the second stepFacing the process, it is suitable to deal with some relatively simple problems Object oriented thought Birds of a feather flock together in a classified thinking mode. When thinkin ...

1, Gossip The weekend is coming again. Today, finish the spring blog, and then start the review of mybatis. I read it in July last year. If I don't write a blog, I'll soon forget it. Ha ha 2, Review mybatis and introduce integration methods 1. mybatis review mybatis has written a simple example before. You can take a look at the previous bl ...

Difference between fusing and degradation Many developers will be confused about the difference between fusing and downgrade. The similarities and differences between the two are summarized below. Similarities between fusing and degradation Service degradation and service fusing are similar from some angles. ·Same purpose. Both are t ...

Statement: This article is the notes sorted out according to the blogger's learning content. It is only used for exchange learning. If you need to watch the video, please move to: http://www.atguigu.com/ 1.Filter ？ What is a filter Filter filter is one of the three major components of Java Web. The three components are: Servlet program, List ...

1. Circular printing public class OutWord { private String word = "output A"; public synchronized void outA() throws InterruptedException { if (word.equals("B output")){ this.wait(); } //Output word System.out.println("word = " + word); word="B output"; this.notify(); } ...

In daily development, we often need to test the execution time of some code, but we don't want to use JMH( Java Microbbenchmark harness (Java micro benchmark suite) is such a heavy testing framework, so this paper summarizes some commonly used execution time statistics methods in Java, including the following 6 kinds in total, as shown in the f ...

4. constant Constant: refers to the fixed data in the Java program. classification typemeaningData examplesinteger constant integerPositive and negative integersDecimal constantdecimalPositive and negative decimalscharacter constants Enclosed in single quotation marks, there is only one character and cannot be empty'word', 'a', '1'string con ...