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- Detailed explanation of map and flatMap operations in Java8 Stream Api
- Java 8 provides a very easy-to-use Stream API, which can easily operate collections. Today we will discuss two Stream intermediate operations map(Function<? super T, ? extends R> mapper) and flatMap(Function<? super T, ? extends Stream<? extends R>> mapper)
- Javagetting Started 4344 2019-11-27 17:50:38
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- A brief discussion on the differences between String, StringBuffer and StringBuilder
- In Java development interviews, we are often asked about the differences between String, StringBuider, and StringBuffer. Many people do not answer comprehensively and in-depth enough, so what are the differences between them?
- Javagetting Started 1829 2019-11-27 17:15:54
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- Annotations for java basics
- This article introduces annotations in Java from the Java introductory learning column, hoping to help students in need. Meta-annotations are used to specify where the annotations can be used. For example: @Target(ElementType.METHOD) means that it can be used on methods, but other structures cannot be used.
- Javagetting Started 2492 2019-11-27 16:51:11
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- Detailed explanation of various usages of Static, final, and Static final in Java
- Are you familiar or unfamiliar with the keywords Static, final, and Static final? Want to say something but don’t know how to say it accurately? Okay, this article will briefly outline their respective uses.
- Javagetting Started 2606 2019-11-27 16:50:30
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- In-depth understanding of abstract classes and interfaces in Java
- I believe everyone has this feeling: abstract classes and interfaces have too many similarities and too many differences. These two often make beginners confused. Whether in actual programming or during interviews, abstract classes and interfaces are particularly important!
- Javagetting Started 2069 2019-11-27 16:44:20
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- What is floating point type? Introduction to single-precision floating-point numbers (float) and double-precision floating-point numbers (double)
- As a Java learner, how can I not understand the basics of these Java basics? This article will take you through Java floating point types, single precision floating point numbers, and double precision floating point numbers.
- Javagetting Started 14806 2019-11-27 16:34:33
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- Detailed introduction to java generics
- This article introduces Java generics in detail to everyone in the Java language introduction column. I hope that students who do not understand this can read this article carefully. Generics provide a compile-time type safety detection mechanism, which allows programmers to detect illegal types at compile time.
- Javagetting Started 1950 2019-11-27 16:30:49
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- Learn more about the transient keyword in Java
- In the process of learning Java, the reason why the transient keyword is rare is actually inseparable from its function: the main function of the transient keyword is to prevent certain member attribute variables modified by the transient keyword from being serialized.
- Javagetting Started 2206 2019-11-27 16:28:04
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- Deep understanding of the static keyword
- The main meaning of static is to create domain variables or methods that are independent of specific objects. So that even if the object is not created, you can still use properties and call methods! Another key role of the static keyword is to form static code blocks to optimize program performance.
- Javagetting Started 3261 2019-11-27 16:15:29
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- What are the container classes in java
- This article introduces the container classes in Java from the java introductory program column. I hope it can help students in need. Container classes in java: 1. List (list); 2. Set (set); 3. Queue (queue); 4. Map (mapping).
- Javagetting Started 4891 2019-11-27 15:35:03
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- Detailed introduction to Lambda expressions in java
- This article introduces lambda expressions in Java in detail from the Java Quick Start column. Everyone is welcome to learn together! A lambda expression is a transitive block of code that can be executed one or more times later.
- Javagetting Started 2863 2019-11-27 15:22:04
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- What are the differences between abstract classes, ordinary classes and interfaces in Java?
- This article introduces the differences between abstract classes, ordinary classes, and interfaces from the Java language introduction column. I hope it can help you better understand these concepts. The difference between abstract classes and ordinary classes is that abstract classes cannot be instantiated; the difference from interfaces is that abstract classes can have constructors, but interfaces cannot have constructors.
- Javagetting Started 5037 2019-11-27 14:27:23
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- Java in-depth learning of static static code blocks
- This article introduces the knowledge about static static code blocks from the java introductory program column. I hope it can help everyone understand it better! Static code blocks are called when the class is loaded, are executed only once, and take precedence over various code blocks and constructors.
- Javagetting Started 2654 2019-11-27 14:00:00
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- The difference between comparable and Comparator in java
- This article introduces the difference between the two comparators in Java from the Java Quick Start column. I hope it can help you. The difference between the two comparators in Java is: "Comparable" is an internal comparator, and "Comparator" is an external comparator.
- Javagetting Started 2265 2019-11-27 13:20:31
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- What are the common syntax errors when using for loops in Java?
- Common syntax errors when using "for" loops in "java" are: 1. Variable declarations cannot be included in the output statement; 2. Two variables with the same name cannot be declared inside the same "for" loop; 3. Variable declarations cannot be included in the output statement. A specific method is required for output.
- Javagetting Started 3782 2019-11-27 10:34:52
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