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The original String type is so powerful, I just thought it was used to define a String. Next is a day to learn String type by doing homework.At the end of the article, there is the help document of JDK API 1.6 in Chinese. It is necessary for novices to get it for free! Brother, I have been looking for i ...

Why Steam is needed Steam in Java 8 is an enhancement of collection object function. It focuses on a variety of very convenient and efficient aggregate operations or bulk data operations for collection objects With the help of the same new Lambda expression, the Steam API greatly improves programmin ...

Overview of the Java Collection Framework On the one hand, object-oriented languages represent things in the form of objects. In order to facilitate the operation of multiple objects, objects need to be stored.On the other hand, there are drawbacks to using Array to store objects, while Java collect ...

Strategy mode It defines the algorithm family and encapsulates them separately so that they can replace each other. This mode makes the change of algorithm not affect the users who use the algorithm. Multiple if...else.. and switch statements can be avoided   Application scenario 1. If there are ...

Springboot 1: Interceptor (interceptor) Interceptors in Java are objects that dynamically intercept action calls. It depends on the web framework and the spring MVC framework in spring MVC. It is an application of AOP based on java reflection mechanism in implementation. It acts like a filter, but ...

As mentioned before, the main function of collections in Java is to hold other data and implement common data structures. So when we want to use common data structures such as "stack", "Queue", "linked list" and "array", we should think that we can directly use the Collection framework provided by JDK. Fo ...

The reason why an interface becomes an interface is that it is not implemented, only declared. But then everything changed. There was a default method in Java and a default method in C ා. Interface is not like the traditional interface, its concept began to approach to abstract class, a pure abstract thing, suddenly appeared entity, so it bega ...

OpenJDK 11 is the first long-term support version after OpenJDK 8. This version has changed a lot in JVM log configuration, mainly standardization and unification. In OpenJDK 8, there are many status bits in the log configuration, which is confusing and difficult to maintain and further iterate. In OpenJDK 11, the JVM log related configuration ...

Original address: http://www.work100.net/training/java-generic.htmlMore tutorials: Beam cloud - free course generic paradigm Serial number Chapter in text video 1 Summary - 2 generic method - 3 Generic class - 4 Type wildcard - Please refer to the navigation above for reading 1. overview Java generics is a new feature introduced ...

Here we undertake Contents of the previous part Let's learn about array, string class and collection class of Java language array 80 Java's array concept is similar to C + +, it should be noted that array is an object One-dimensional array Directly specify the initial value to create an array ...