Post, Code and Quiet Time.

Lombok Dependency is missing How to add Lombok to your project

Amazon tag on lintcode problems https://www.lintcode.com/problem/?tag=amazon Amazon behavioral interview questions https://interviewgenie.com/blog-1/interviewing-at-amazon-behavioral-interview-questions Amazon Leadership Principles https://www.amazon.jobs/en/principles

fault code short s = 5; s = s - 2; error: incompatible types: possible lossy conversion from int to short s = s - 2; ^ 1 error Correct code // why below line ok ? ask java compiler. s -= 2; s = (short)(s - 2); Java report error while c/c++ do not

why can't float a = 5.6; ? error: incompatible types: possible lossy conversion from double to float float a = 5.6; ^ 1 error Cause double is the default type of floating point number in java language. Fix float a = 5.6f;

Recently, I begin to use java in my work. I used to c++ for more than 10 years. Programmer start every thing begin with Hello World public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!"); } } Java main function, must be in a public class public

One java source file generate one .class byte code file ? False. I thought one java source code file will generate only one .class byte code file, since I am a c++ programmer for about 10 years. The correct answer is how many classes defined in java source, how many .class

First, Download lingoes font file Android default fonts can not display phonetic symbol. lingoes.ttf can, please download it. Second, Put lingoes.ttf to assets/font Last, Add "lingoes" font-family in css files under assets @font-face { font-family: 'lingoes'; src:url('file:///android_asset/fonts/lingoes.ttf') format('truetype'); font-weight: normal;

The base url for html files under the assets of your app is "file:///android_asset/" WebView wv = new WebView(context); wv.getSettings().setJavaScriptEnabled(true); wv.loadUrl("file:///android_asset/coca/coca_00001_the.html");

private void moveAssets(String assets_file_path, String absolutePath) throws IOException { File wwwFile = new File(absolutePath); if (wwwFile.exists()) return; InputStream is = activity.getAssets().open(assets_file_path); byte[] buffer = new byte[is.available()]; is.read(buffer); is.close(); wwwFile.createNewFile(); FileOutputStream os = new FileOutputStream(wwwFile); os.write(buffer); os.

Add ~android:screenOrientation="fullSensor"~ to the activity AndroidManifest.xml activity android:name=".MainActivity" android:screenOrientation="fullSensor"

Put below scripts in your ~/.bash_profile or ~/.bashrc It will auto run "unison" process if not running yet when you open a new bash shell every time. Change the process name "unison" for your case. :) auto_unison() { u=`ps aux | grep unison | grep -v grep | wc -l` if [ $u

The easy way is to register a BroadcastReceiver for Intent.ACTION_LOCALE_CHANGED. Example: change your ViewModel data when language/locale changed. public class QASViewModel extends ViewModel { @SuppressLint("StaticFieldLeak") private final FragmentActivity activity; public QASViewModel(@NonNull FragmentActivity activity) { this.activity = activity; setLangReceiver(); } private void setLangReceiver() { final QASViewModel qasViewModel = this;

Android ViewModel is very useful. However ViewModel has no args constructor by default. Typical usage of ViewModel looks like: public class UserModel extends ViewModel { } final UserModel viewModel = ViewModelProviders.of(this).get(UserModel.class); Let's look the definition of ViewModelProviders.of method. /** * Creates a {@link ViewModelProvider}, which retains ViewModels while a

Use java.time.Instant; import java.time.Instant; Instant instantStart = Instant.parse("20200229T12:00:00Z"); Instant instantEnd = Instant.parse("20200329T12:00:00Z"); Instant instantNow = Instant.now(); return instantNow.isAfter(instantStart) && instantNow.isBefore(instantEnd);

my favourite best best best vim plugin mark install vim mark *.vmb.gz :so % dependence ingo install vim ingo-library*.vmb.gz :so % Usage \m

Use com.amazonaws.util.json.Jackson import com.amazonaws.util.json.Jackson; import java.util.ArrayList; import lombok.Data; @Data class DeviceList { private ArrayList devices; } DeviceList deviceList = Jackson.fromJsonString("{\"devices\":[\"Mobile\", \"Desktop\"]}", DeviceList.class);

Easy wasy to print Java call stack or backtrace: Implement a function and throw an Exception. Call the function in the place you want to know its backtrace or callstack And Catch the Exception then Call Exception.getStackTrace class MyService { public static void f() throws Exception { throw new Exception(); } void

class MyService { private UserDao userDao; } import org.junit.Assert; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.mockito.InjectMocks; import org.mockito.Mock; import org.mockito.Mockito; import org.mockito.MockitoAnnotations; import org.mockito.runners.MockitoJUnitRunner; public class MyServiceTest { @InjectMocks private MyService myService;

Command + Shift + A or Ctrl + Shift + A Type registry, click "Registry..." Increase the "terminal.buffer.max.lines.count" to 100000 or any number you want, the default is 1000.

IDE setup latest vim git clone https://github.com/vim/vim.git cd vim/src ./configure --enable-cscope --enable-terminal make sudo make install https://www.vim.org/git.php use universal ctags git clone https://github.com/universal-ctags/ctags.git cd ctags ./autogen.sh ./configure make sudo make instahttps://www.tamacom.

install JDK 8 $ sudo apt-get install openjdk-8-jdk install Gradle $ curl -s "https://get.sdkman.io" | bash $ source "$HOME/.sdkman/bin/sdkman-init.sh" $ sdk install gradle 5.1.1 Spring Initializr start.spring.io get your "demo.zip" and unzip it. choose "Gradle Project", please remember add "Web" as dependence, otherwise

URI all you have to do is to sign a request like: https://s3.amazonaws.com/yourbucket/key?response-content-disposition=inline&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAJWWH7EGSUBWE34IQ/20181228/us-east-1/s3/aws4_request&X-Amz-Date=20181228T074135Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=b3143f8442812e176fd61838813a33f53cfd7e198e1c6e68fab5d03d4a642403 and set it as src attribue to a video element. Player component import

Official guide I encountered some errors while following the Official guide. Lucky, I fixed all the errors and make it work finally. Notes my workaround here, hope it work for you if you have the same problem. gpg: keyserver receive failed: keyserver error local install guide solution from stackoverflow sudo

Evaporate and config s3 bucket and IAM user EvaporateJS Config AWS s3 bucket Managing Access Permissions to Your Amazon S3 Resources User Access Key In summary, create a s3 bucket, set up CORS settings and bucket policy. https://*.yourdomain.com http://*.yourdomain.com PUT

Lambda function(js) const AWS = require('aws-sdk'); const cognito = new AWS.CognitoIdentityServiceProvider(); function getUser(Username) { return new Promise((resolve, reject) => { cognito.adminGetUser({ UserPoolId: process.env.COGNITO_USER_POOL_ID, Username: Username }, (err, data) => { if (err) reject(err.stack); else resolve(data.UserAttributes[2].Value); }); }); } async functio