Java

Original: Https://www.oschina.net/p/findbugsFindBugs is an Eclipse plug-in tool that can statically parse the source code for possible bugs. It examines the class or JAR file and compares the bytecode to a set of defect patterns to identify possible

The Java.util.Arrays class makes it easy to manipulate an array, and all of the methods it provides are static. Has the following features:1. Elements inside the direct output array (Java Core volume- array is a data structure )2 Assigning a value

Java read. Properties configuration file These two days to do the Java project, use the property file, to the online search information, long time also did not find a comfortable way to let me read into the.

The Java Platform Class library contains a rich set of concurrent infrastructure modules, such as thread-safe container classes and a variety of synchronization tool classes used to coordinate multiple mutually collaborative thread control

Java Fundamentals (Chapter 14)1. Packages (package) in Java2.1 packages, corresponding to folders on disk2.2 Create a new class that defaults to the default package2.3 Declaring the Package keyword: packagesPackage statement, pinned location2.4

Disclaimer: This blog is an original blog, without consent. No reprint! Small partners assume that it is seen elsewhere, suggest or csdn to see (link to http://blog.csdn.net/bettarwang/article/details/26412497), see the code and ask questions,

AbnormalI. Unexpected results of behavior can be divided into two categoriesUnexpected results that can be handled are called exceptions (Exception)Unexpected results that cannot be handled are called errors (Error)An exception is a special object

Definition: Dynamically add some extra responsibilities to an object, just like painting on a wall. Using the decorator mode, it is more flexible to achieve the expansion of the function by the method of generating subclasses.Design: Often can use

ArrayList and LinkedList differences in implementationThe list represents a linear table of data structure, ArrayList is a sequential storage of the linear table, ArrayList in the form of dynamic array to save each set element, LinkedList is a chain-

The syntax of a switch structure (switching statement)switch (expression) {---> type int, charCASE constant 1:---> Casestructure can have multipleStatement Block 1break;---> program jump out of the switch structureCASE constant N: values of--->

Basic conceptsIn the Java Runtime environment, for any class, can you know what the properties and methods of this class are? Can any one of its methods be called for any of the objects?The answer is yes.This dynamic acquisition of information for

Reference indicators for performance Execution time-from the time the code starts running to the end CPU time--the time that a function or thread consumes the CPU Memory allocation-a scenario in which a program consumes memory

Fork/joinThe Fork/join in JAVA7, similar to the mapreduce idea of Distributed File System Hadoop, is to split the task, then split it, until it is partitioned to meet the conditionsFor ease of understanding: The programming logic can borrow the idea

Original address: http://blog.csdn.NET/m13666368773/article/details/7796924The recent machine memory is full, out of the new machine memory, but also should take a good review of our code, there are a lot of code to write too casually, these bad

In the previous section we talked about the regular usage of collection. And the previous chapters, we introduced the AddAll method of collection, which we introduce to the attention point of this chapter.Note that, in the regular usage, the basic

?? nanosecond NS (nanosecond): nanoseconds,Time Unit。 One of the 1 billion points in a second, which equals 10 minus 9 seconds.A unit that is often used as a memory read/write speed, the lower the number, the faster.1 nanoseconds =1000Leather

CollectionDerived from the Java.util package, is a very useful and commonly used data structure!!!!! It literally means a container. The specific inheritance implementation relationship, such as the overall impression, followed by the introduction

first, Hibernate IntroductionIn many scenarios, we don't need to use JdbcTemplate to manipulate SQL statements directly, so we can use the ORM tool to save a lot of code and development Time. ORM tools can shift attention away from Error-prone SQL

Use Homebrew to configure the Java development environment and homebrewjava Query java Brew cask search java View version information Brew cask info java Download and install JDK 8 from the official website Brew cask install java To install

Understanding JAVA event processing mechanism from scratch (3), from scratch java We have written the example of teacher-student in two consecutive sections, and we will surely feel bored. In this example, we are playing for 100 times and still do