Java
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Static code block
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Java calls MySQL dump to back up the database
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JDBC connection class
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Mongodb counts user PV and UV through MapReduce
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Struts 2 realizes file upload and download (download supports Chinese file name) code
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Android obtains internal and external memory cards of mobile phone
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Calculator implemented by Java Swing
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Android phone screen PX to DP and DP to PX tool classes
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Continuously click the back key in the android app to exit the app
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Android multi file upload based on standard HTTP
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Java tool classes in some formats
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Dynamically load the DEX files of other installed apks and execute them through reflection
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Java class to extract Chinese string from source code
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Using java mail to send mail code
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Java screen capture
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Send mail automatically from Java mailbox
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A * simple implementation of Java algorithm
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Android slidingmenu to achieve sidebar effect
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Android switch GPRS traffic
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Android Animation: frame animation
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Get the signature information of the current app
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Android textview running lamp text scrolling effect
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36 common code snippets for Android Development
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Android gets local pictures and displays them
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Use httpurlconnection to download and display pictures
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Copy APK in raw to / data / data / package name / files /
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How to end the whole application in Android development
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[Android tools] an algorithm safer than DES encryption — 3DES encryption algorithm
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[Android tools] activity management tool appmanager
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FTP and NFS server-side upload and download
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Spring MVC filter – login filter
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Java randomly generates the first n non repeating integers
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