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The getCause() method is from Throwable class and we can use this method which returns the cause of the exception or returns null if the cause of the exception is not known. The getCause() method doesn’t accept any arguments and doesn’t throw an exception. It returns the cause that was provided by one of its constructors or that was determined by the formation of the initCause() method of Throwable class.Syntaxpublic Throwable getCause()Examplepublic class GetCauseMethodTest { public static void main(String[] args) throws Exception { try { myException(); } catch(Exception e) { System.out.println("Cause ... Read More
A Java Class is stored in the form of byte code in a .class file after it is compiled. The ClassLoader loads the class of the Java program into memory when it is required. The ClassLoader is hierarchical and so if there is a request to load a class, it is delegated to the parent class loader.The types of ClassLoader in Java are given as followsBootstrap ClassLoaderExtensions ClassLoaderSystem ClassLoaderExamplepublic class ClassLoaderTest { public static void main(String[] args) { System.out.println("class loader for this class: " + ClassLoaderTest.class.getClassLoader()); System.out.println("class loader for DNSNameService: " + sun.net.spi.nameservice.dns.DNSNameService.class.getClassLoader()); ... Read More
The object-fit property in CSS is used to resize image or video to fit its container. It has the following valuescontain: Content is scaled to fitcover: clipped to fitfill: fills the content box.ExampleYou can try to run the following code to implement object-fit property with the cover value.Live Demo .myimg { width:250px; height:350px; object-fit:fill; } SWIFT
Use the flex-wrap property with wrap-reverse value to wrap flex-items in reverse order.ExampleYou can try to run the following code to implement the wrap-reverse value −Live Demo .mycontainer { display: flex; background-color: orange; flex-wrap: wrap-reverse; } .mycontainer > div { background-color: white; text-align: center; line-height: 40px; font-size: 25px; width: 100px; margin: 5px; } Quiz Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9
Let us first create a table −mysql> create table DemoTable746 ( Number int ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable746 values(100); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable746 values(200); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable746 values(300); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable746 values(400); Query OK, 1 row affected (0.20 sec)Display all records from the table using select statement −mysql> select *from DemoTable746;This will produce the following output -+--------+ | Number | +--------+ ... Read More
This example demonstrates how do I convert an image to Base 64 string on android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 – Copy paste an image in the res/drawable. Example: res/drawable/logo.pngStep 4 − Add the following code to src/MainActivity.javaimport android.annotation.SuppressLint; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Base64; import android.widget.TextView; import java.io.ByteArrayOutputStream; public class MainActivity extends AppCompatActivity { TextView textView; String string; Bitmap ... Read More
Yes, we can have an empty catch block. But this is a bad practice to implement in Java.Generally, the try block has the code which is capable of producing exceptions, if anything wrong in the try block, for instance, divide by zero, file not found, etc. It will generate an exception that is caught by the catch block. The catch block catches and handles the exception. If the catch block is empty then we will have no idea what went wrong within our code.Examplepublic class EmptyCatchBlockTest { public static void main(String[] args) { try { int a ... Read More
This example demonstrates how do I set the color of a textView span in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.graphics.Color; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.SpannableString; import android.text.Spanned; import android.text.style.ForegroundColorSpan; import android.widget.TextView; public class MainActivity extends AppCompatActivity { TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ... Read More
CollectionView with TableView are two of many fundamental concept of iOS development, every developer should master both to be a good developer.In this post we will be focussing mainly on CollectionView, CollectionView is same as table view with some difference, Collection View supports both horizontal and vertical scrolling which looks like a grid. CollectionView in iOS is also referred to grid view in Android.To read more about it you can refer https://developer.apple.com/documentation/uikit/uicollectionviewAs you can see Collection View consists of Supplementary View and Cell, The collection view presents items onscreen using a cell, which is an instance of the UICollectionViewCell class ... Read More
This example demonstrates how do I parse HTML in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 – Add the given dependency in the build.gradle (Module: app)implementation 'org.jsoup:jsoup:1.11.2'Step 4 − Add the following code to src/MainActivity.javaimport android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.TextView; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import java.io.IOException; public class MainActivity extends AppCompatActivity { Button button; TextView textView; ... Read More