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Introduction to String class String yes a reference data type is null by default;String is of final type and cannot be changed and inherited;The combination of basic type and String will be converted to String type; 1, String common methods length() method 1. Use the length() method of the String class to get the length of the declared String o ...

IO stream, that is, the technology used to manipulate the content of a File. So before we talk about IO streams, we need to know about the File class. 1, File file class 1. File class introduction File is used by Java to represent files / folders (directories). Files / folders on the hard disk can b ...

About RXTX RXTX is an open source java class library that provides serial and parallel port communication. The files published by this project follow LGPL protocol. RXTX project provides compatibility under windows, Linux, Mac OS X, and Solaris Operating Systems javax.comm The implementation of the ...

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Preface A little bit of Android Reverse was done the year before, but it hasn't been done for a long time. Recently, a buddy asked me to help him do a subtitle about Android Reverse, so pick up the knowledge of Android Reverse and start over. This apk is a very simple, entry-level Android Reverse Analysis program, so this article is main ...

Token authentication In restful design, user authentication mode usually uses json web token instead of traditional HTTP Basic authentication (incoming account password) The token authentication mode is as follows: add token to the request header Implementation in Flask Flask extension flask httpauth provides the authentication ...

1. Data coding problem of curl submission When using curl to send a POST request under windows, there is a problem. The parameters transmitted are not UTF-8 encoded. 1. In the GIT bash test, locale is UTF-8, no effect, the server received or GBK encoding. 2. Tested under cmd, chcp 65001 has no effect. The server receives GBK code. 3. Wri ...

LeetCode -- longest substring without duplicate characters Blog Description The information in this article comes from the Internet and personal summary, which is intended to summarize personal learning and experience. If there is any infringement, please contact me to delete it. Thank you! Explain leetcode Question, Interview 48 The longest ...

1.flask specific variables and functions: Variables: g, session, request, config Functions: URL for(), get flashed messages(), please pay attention to this function. Remember that it is a function. Don't forget to write brackets!!!!!!!!! I don't need to talk much nonsense. I'll go straight to the code to experience it: First, explain a bug. Whe ...

1. base64 encodes binary data in ASCII The base64 module contains functions that transform binary data into a subset of ASCII suitable for transmission using the plain text protocol. Base64, Base32, Base16, and Base85 encode to convert 8-bit bytes into characters within the range of ASCII printable characters, leaving more bits to represent dat ...