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The subexpression “[...]” matches any single character specified in the brackets.Example 1import java.util.regex.Matcher; import java.util.regex.Pattern; public class SpecifiedCharacters { public static void main( String args[] ) { String regex = "[hwt]"; String input = "Hi how are you welcome to Tutorialspoint"; Pattern p = Pattern.compile(regex); Matcher m = p.matcher(input); int count = 0; while(m.find()) { count++; } System.out.println("Number of matches: "+count); } }OutputNumber of matches: 6Example 2The following Java program ... Read More
The subexpression/metacharacter “re*” matches 0 or more occurrences of the preceding expression.Example 1import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexExample { public static void main( String args[] ) { String regex = "aabc*"; String input = "aabcabcaabcabbcaabcbcaabc"; Pattern p = Pattern.compile(regex); Matcher m = p.matcher(input); int count = 0; while(m.find()) { count++; } System.out.println("Number of matches: "+count); } }OutputNumber of matches: 4Example 2import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class MatchAllCharacters ... Read More
The subexpression/metacharacter “\A” matches the beginning of the entire string.Example 1import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexExample { public static void main( String args[] ) { String regex = "\AHi"; String input = "Hi how are you welcome to Tutorialspoint"; Pattern p = Pattern.compile(regex); Matcher m = p.matcher(input); int count = 0; while(m.find()) { count++; } System.out.println("Number of matches: "+count); } }OutputNumber of matches: 1Example2Following Java program accepts a string ... Read More
The subexpression/metacharacter “.” matches any single character except a newline.Example1import java.util.regex.Matcher; import java.util.regex.Pattern; public class MatchesAll { public static void main( String args[] ) { String regex = "."; String input = "Hi how are you welcome to Tutorialspoint"; Pattern p = Pattern.compile(regex); Matcher m = p.matcher(input); int count = 0; while(m.find()) { count++; } System.out.println("Number of matches: "+count); } }OutputNumber of matches: 40Example 2The following Java program accepts 5 ... Read More
The subexpression/metacharacter “$” matches the end of a line.Example 1import java.util.regex.Matcher; import java.util.regex.Pattern; public class EndWith { public static void main( String args[] ) { String regex = "Tutorialspoint$"; String input = "Hi how are you welcome to Tutorialspoint"; Pattern p = Pattern.compile(regex); Matcher m = p.matcher(input); int count = 0; while(m.find()) { count++; System.out.println("Number of matches: "+count); } } }OutputNumber of matches: 1Example 2The following Java program accepts ... Read More
The subexpression/metacharacter “^” matches the beginning of a line. If you use this in a regular expression, it matches the sentence succeeding it in the input string.Example 1import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexExample { public static void main( String args[] ) { String regex = "^Hi how are you"; String input = "Hi how are you welcome to Tutorialspoint"; Pattern p = Pattern.compile(regex); Matcher m = p.matcher(input); int count = 0; while(m.find()) { count++; ... Read More
Spring framework provides two IOC container for managing, configuring and manipulating beans. One is BeanFactory and the other is Application Context. The application context interface extends BeanFactory to enhance the functionality of BeanFactory. In new Spring versions, BeanFactory is replaced with ApplicationContext. But still, BeanFactory exists for backward compatibility. Spring version 2.0 and above, is used BeanPostProcessor extension point(Interface which provides some callback methods that we can implement to customize the instantiation logic, dependency-resolution logic and etc ). So, if you are using BeanFactory then some of the functionality such as AOP and transaction will not work without doing some extra configuration.Sr. No.KeyBeanfactoryApplication ... Read More
Lazy and Eager are two types of data loading strategies in ORMs such as hibernate and eclipse Link. These data loading strategies we used when one entity class is having references to other Entities like Employee and Phone (phone in the employee). Lazy Loading − Associated data loads only when we explicitly call getter or size method.Use Lazy Loading when you are using one-to-many collections.Use Lazy Loading when you are sure that you are not using related entities. Egare Loading − Data loading happens at the time of their parent is fetched. Use Eager Loading when the relations are not too much. Thus, ... Read More
This example demonstrates how How to display the count of notifications in Android App launcher.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.javapackage com.app.sample; import androidx.appcompat.app.AppCompatActivity; import androidx.core.app.NotificationCompat; import android.annotation.SuppressLint; import android.os.Bundle; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.app.PendingIntent ; import android.content.Intent ; import android.os.Bundle ; import android.view.View ; import static android.app.Notification. BADGE_ICON_SMALL ; public class MainActivity extends AppCompatActivity { static ... Read More
This example demonstrates how to implement a custom AlertDialog View 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 res/layout/my_dialog.xml. Step 4 − Add the following code to res/drawable/button_background.xml. ... Read More