"Java" Topic Questions

1 package com . mkyong . seo ; 2 import javax . xml . parsers . DocumentBuilderFactory ; 3 import javax . xml . parsers . DocumentBuilder ; 4 import org . w3c . dom . Document ; 5 import org . w3c . dom . NodeList ; 6 import org . w3c . dom . Node ; 7 import org . w3c . dom . Element ; 8 import .....Read More

1 import org . junit . Test ; 2 import static org . junit . Assert . * ; 3 public class MyTestClass 4 { 5 private static final int TEST_TIMEOUT = 60000 ; // one minute per test 6 @ Test ( timeout = TEST_TIMEOUT ) 7 public void testJDK () 8 { 9 assertTrue ( Something is very wrong , Boolean . TRUE .....Read More

1 for ( String str : strArr ) { 2 continue ; //Skips current iteration and moves onto the following 3 } Source: Tutorials .....Read More

1 do { 2 //something you want to execute at least once 3 } while ( someBooleanCondition ); Source: .....Read More

1 @ Bean 2 public Docket api () { 3 return new Docket ( DocumentationType . SWAGGER_2 ) 4 . select () 5 . apis ( RequestHandlerSelectors . basePackage ( com.xxx.yyy.resource )) 6 . paths ( PathSelectors . any ()) 7 . build () 8 . globalOperationParameters ( commonParameters ()) 9 . apiInfo ( .....Read More

Information about the IDX file format: the IDX file format is a simple format for vectors and multidimensional matrices of various numerical types . The basic format is: magic number size in dimension 0 size in dimension 1 size in dimension 2 ..... size in dimension N data. The magic number is an .....Read More

1 ahh rainbow six seige aka delete your life Source: .....Read More

Java AES Encryption Example | CBC Mode + 128 Bits + PKCS5Padding. September 4, 2018 by javainterviewpoint Leave a Comment. AES (Advanced Encryption Standard) is a strong encryption and decryption algorithm and more secure than its predecessors DES (Data Encryption Standard) and 3DES .....Read More

1 LocalDate date = LocalDate . parse ( 2018-05-05 ); Source: Tutorials .....Read More

1 import java . util . * ; 2 import java . io . * ; 3 public class SearchEngine { 4 public static void main ( String [] args ){ 5 Hashtable < String , ArrayList < String > > ht = new Hashtable < String , ArrayList < String > > (); 6 Scanner kb = new Scanner ( System . in ); .....Read More

1 String [] array = { 0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 }; 2 String [] a = Arrays . copyOfRange ( array , 0 , 4 ); //<- (targetArray, start, to) 3 String [] b = Arrays . copyOfRange ( array , 4 , array . length ); 4 Output : 5 a : 0 , 1 , 2 , 3 6 b : 4 , 5 , 6 , 7 , 8 , 9 Source: Code .....Read More

The object of a TextField class is a text component that allows a user to enter a single line text and edit it . It inherits TextComponent class, which further inherits Component class. When we enter a key in the text field (like key pressed, key released or key typed), the event is sent to .....Read More

1 // import <package> -> Imports the whole package 2 // import <package>.<class> -> Imports a certain class 3 import java . util . Scanner ; Source: Tutorials .....Read More

1 list . set ( 2 , New ); Source: .....Read More

1 \ documentclass { article } 2 \ usepackage { graphicx } 3 \ usepackage { amsmath } 4 \ newcommand \ Inn { % 5 \ mathrel {\ ooalign { $ \ subset$ \ cr \ hfil \ scalebox { 0.8 }[ 1 ]{ $ = $ }\ hfil \ cr }} % 6 } 7 \ begin { document } 8 \[ 9 A \ in B % one stroke in middle 10 \] 11 \[ 12 A \ Inn B .....Read More

Tuple. The word “tuple” means “a data structure consisting of multiple parts”. Hence Tuples can be defined as a data structure that can hold multiple values and these values may/may not be related to each other. Example: [Geeks, 123, &#*@] In this example, the values in the tuple are not at all .....Read More

1 import java . util . ArrayList ; 2 import java . util . Arrays ; 3 import java . util . List ; 4   5 class Main 6 { 7      private static Integer [] append ( Integer [] arr , int element ) { 8          List < Integer > list = .....Read More

1 try ( BufferedReader br = new BufferedReader ( new FileReader ( file.txt ))) { 2 StringBuilder sb = new StringBuilder (); 3 String line = br . readLine (); 4 while ( line != null ) { 5 sb . append ( line ); 6 sb . append ( System . lineSeparator ()); 7 line = br . readLine (); 8 } 9 String .....Read More

1 By adding @ TestMethodOrder annotation 2 on top of class and 3 than @ Order tag on each test 4 with giving them number 5 // these are all available option for ordering your tests 6 //@TestMethodOrder(OrderAnnotation.class) 7 //@TestMethodOrder(Random.class) 8 //@TestMethodOrder(MethodName.class) .....Read More

1 import java . util . ArrayList ; 2 public class ArrayListIsEmptyMethodExample 3 { 4 public static void main ( String [] args ) 5 { 6 ArrayList < Integer > al = new ArrayList < Integer > (); 7 // before checking ArrayList using isEmpty() method 8 System . out . println ( Is ArrayList .....Read More

1 String [] MONTHS = { 2 " , Jan , Feb , Mar , Apr , May , Jun , 3 Jul , Aug , Sep , Oct , Nov , Dec 4 }; 5 ... 6 System . out . println ( MONTHS [ m ]); Source: Code .....Read More

BCrypt is a one way salted hash function based on the Blowfish cipher. It provides several enhancements over plain text passwords (unfortunately this still happens quite often) and traditional hashing algorithms .....Read More

1 Process process = new ProcessBuilder ( D:\\path\\executable.exe ). start (); 2 InputStream processInputStream = process . geInputStream (); 3 OutputSteam processOutputStream = process . getOutputStream (); 4 BufferedWriter writer = new BufferedWriter ( new OutputStreamWriter ( processOutputStream .....Read More

1 use Math . pi to get the double value of pi Source: Geeks For .....Read More

1 @ echo off 2 set a [ 0 ] = 1 3 set a [ 1 ] = 2 4 set a [ 2 ] = 3 5 Rem Setting the new value for the second element of the array 6 Set a [ 1 ] = 5 7 echo The new value of the second element of the array is % a [ 1 ] % Source: .....Read More

1 Save   this   file   as   MyCalculator . java   2 to   compile   it   use   3      javac   MyCalculator . java   4 to   use   the   calcuator   do   this   5      java .....Read More

1 //Password validation example 2 public static Boolean validPassword ( String password ) throws IllegalArgumentException { 3 if ( ! password . matches ( \\w{6,} )) /*Or '(password.matches(\\w{6,}) == false)'*/ { 4 throw new IllegalArgumentException ( Password must be at least 6 characters long. ); .....Read More

1 LocalDateTime start = LocalDateTime . now (); 2 // Hour + 1, set Minute and Second to 00 3 LocalDateTime end = start . plusHours ( 1 ). truncatedTo ( ChronoUnit . HOURS ); 4 // Get Duration 5 Duration duration = Duration . between ( start , end ); 6 long millis = duration . toMillis (); Source: .....Read More

1 android : visibility = invisible Source: .....Read More

1 //Firebase Auth 2 implementation 'com.google.firebase:firebase-auth:20.0.2' 3 //Firebase Auth Ui 4 implementation 'com.firebaseui:firebase-ui-auth:5.0.0' Source: Tutorials .....Read More

1 //WithLabelledLoop.java 2 class WithLabelledLoop 3 { 4 public static void main ( String args []) 5 { 6 int i , j ; 7 loop1 : for ( i = 1 ; i <= 10 ; i ++ ) 8 { 9 System . out . println (); 10 loop2 : for ( j = 1 ; j <= 10 ; j ++ ) 11 { 12 System . out . print ( j + ); 13 if ( j == 5 ) 14 .....Read More

1 <!-- Exclude Spring Boot's Default Logging --> 2 < dependency > 3 < groupId > org . springframework . boot < /groupId> 4 < artifactId > spring - boot - starter < /artifactId> 5 < exclusions > 6 < exclusion > 7 < groupId > org . springframework .....Read More

1 import java . util . Arrays ; 2 3 public class AnagramString { 4 static void isAnagram ( String str1 , String str2 ) { 5 String s1 = str1 . replaceAll ( \\s , " ); 6 String s2 = str2 . replaceAll ( \\s , " ); 7 boolean status = true ; 8 if ( s1 . length () != s2 . length ()) { 9 status = false ; .....Read More

1 import java . util . * ; 2 class Check 3 { 4 public static void main ( String arg []) 5 { 6    HashMap < Integer , String > hm = new HashMap < Integer , String > (); 7    8        hm . put ( 17 , abhishek ); 9   10 .....Read More

1 //onEnable in Main class 2 getServer (). getMessenger (). registerOutgoingPluginChannel ( this , BungeeCord ); 3 //When you want to connect the player 4 //server is the server name the player should connect to 5 //the variable player is the player you want to connect 6 ByteArrayDataOutput out = .....Read More

Signed Integers are stored in the database as positive and negative values range, from -1 to -128 . Opposite to that, Unsigned Integers hold the large set of positive range values only, no negative values, from 0 to 255 . It means that unsigned integers can never store negative values. .....Read More

1 /*can address these properties: */ 2 - fx - border - width 3 - fx - border - color 4 - fx - background - color 5 - fx - font - size 6 - fx - text - fill 7 /* see source for more examples 8 see JavaFX CSS Reference Guide for additional properties: 9 .....Read More

1 YourClass . getDeclaredConstructor (). newInstance () Source: .....Read More

In software engineering, a WAR file (Web Application Resource or Web application ARchive) is a file used to distribute a collection of JAR-files, JavaServer Pages, Java Servlets, Java classes, XML files, tag libraries, static web pages (HTML and related files) and other resources that together .....Read More

1 jdbc : mysql : //localhost/db?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC Source: .....Read More

Java sqrt() method with Examples Math. sqrt() returns the square root of a value of type double passed to it as argument . If the argument is NaN or negative, then the result is NaN. If the argument is positive infinity, then the result is positive infinity. .....Read More

A Comma-Separated Values (CSV) file is just a normal plain-text file, store data in column by column, and split it by a separator (e.g normally it is a comma “, ”). OpenCSV is a CSV parser library for Java . OpenCSV supports all the basic CSV-type operations you are want to do. 29-Jul-2021 Source: .....Read More

1 long MaxLong = 9223372036854775807 ; // 9,223,372,036,854,775,807 Source: Tutorials .....Read More

QName represents a qualified name as defined in the XML specifications : XML Schema Part2: Datatypes specification, Namespaces in XML, Namespaces in XML Errata. The value of a QName contains a Namespace URI, local part and .....Read More

1 public boolean validateIsbn10 ( String isbn ) 2 { 3 if ( isbn == null ) 4 { 5 return false ; 6 } 7 //remove any hyphens 8 isbn = isbn . replaceAll ( - , " ); 9 //must be a 10 digit ISBN 10 if ( isbn . length () != 10 ) 11 { 12 return false ; 13 } 14 try 15 { 16 int tot = 0 ; 17 for ( int i = 0 ; .....Read More

1 Your_ArrayList_Name . stream (). mapToInt ( k -> k ). toArray (); Source: Tutorials .....Read More

1 System . out . println ( LocalTime . now ()); Source: Tutorials .....Read More

1 import java . util . ArrayList ; 2 import java . util . List ; 3 public class ArrayListSubListMethodExample 4 { 5 public static void main ( String [] args ) 6 { 7 try 8 { 9 ArrayList < String > al = new ArrayList < String > (); 10 al . add ( orange ); 11 al . add ( apple ); 12 al . .....Read More

1 myJButton . doClick (); Source: Geeks For .....Read More

Description The Java Development Kit is a distribution of Java Technology by Oracle Corporation. It implements the Java Language Specification and the Java Virtual Machine Specification and provides the Standard Edition of the Java Application Programming Interface. .....Read More