java

Spring boot validation annotations @Valid and @NotBlank not working

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If you are facing this problem in latest version of spring boot (2.3.0) make sure to add the following dependency: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-validation</artifactId> </dependency> Observation: In earlier version of Spring Boot (1.4.7), javax.validation used to work out of the box. But, after upgrading to latest version, annotations broke. Adding the following dependency alone doesn’t work: …

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How to fix Eclipse autocomplete not working

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This is recurring for me. I’m using Eclipse 2019-03 in Windows 10. The steps below work for my case, and does not require a restart. Window->Preferences->Java->Editor->Content Assist->Advanced The following options are de-selected, and when I set them the autocomplete worked as before. No restart needed. 1. Java Non-Type Proposals 2. Java Proposals 3. Java Type …

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android.support.v4.content.FileProvider not found

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As of AndroidX (the repackaged Android Support Library), the path is androidx.core.content.FileProvider so the updated provider tag would be: <provider android:name=”androidx.core.content.FileProvider” android:authorities=”${applicationId}.fileprovider” android:exported=”false” android:grantUriPermissions=”true”> <meta-data android:name=”android.support.FILE_PROVIDER_PATHS” android:resource=”@xml/file_paths” /> </provider> Android Support Libraries are now in the androidx.* package hierarchy. android.* is now reserved to the built-in Android System Libraries.

Which programming languages can be used to develop in Android? [duplicate]

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At launch, Java was the only officially supported programming language for building distributable third-party Android software. Android Native Development Kit (Android NDK) which will allow developers to build Android software components with C and C++. In addition to delivering support for native code, Google is also extending Android to support popular dynamic scripting languages. Earlier …

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