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Forums in Java
What is the best way to handle multiple threads asynchronously in C#
I want to handle multiple threads asynchronously
Signed and Unsigned integral types in Java
What is the difference between signed and unsigned integral datatypes in Java?
What are the differences between a HashMap and a Hashtable in Java?
What are the differences between a HashMap and a Hashtable in Java? Which is more efficient for non-threaded applications?
hibernate related question
Through hibernate what type operation we perform Is data jpa is related to hibernate
Signature Mismatch Issue with XML Sig Verification (xades) in java
I'm facing an issue with XML signature verification and need some help debugging my code. I have three key classes, my signature didn't verified i am also new to java and tried everything but no success. what is my mistake? how to correct my code so that signature can be verified and generated against xml. ISO 20022 xml format shall be digitally signed and verified from below code <Document xmlns="urn:iso:std:iso:20022:tech:xsd:pain.001.001.03"> <AppHdr><Fr><FIId><FinInstnId><BICFI>ABCDEFGHIJKL</BICFI></FinInstnId></FIId></Fr><To><FIId><FinInstnId><BICFI>MNOPQRSTUVWXYZ</BICFI></FinInstnId></FIId></To><BizMsgIdr>Message123</BizMsgIdr><MsgDefIdr>abcd.1234</MsgDefIdr><CreDt>2024-08-15T12:00:00Z</CreDt></AppHdr> </Document> XadesSigner (CREATE SIGNATURE) XadesSignatureVerifier (verify signature) NoUriDereferencer.java (implemented custom URIDereferencer) verfifier logs Dereferencing URI: #_f838896a-be99-44a1-8b37-af12e079be08 Dereferencing URI: #_98ff15ed-7328-4241-abd0-67021d18488f-signedprops URI is null or not found in map: com.ibm.xml.crypto.dsig.dom.ReferenceImpl@b0cf108f Using data for null URI: javax.xml.crypto.OctetStreamData@982a8d94 Core Validation Status: false Signature failed core validation Signature validation status: true Reference validity status: true, Reference URI: [#_f838896a-be99-44a1-8b37-af12e079be08] Reference validity status: true, Reference URI: [#_98ff15ed-7328-4241-abd0-67021d18488f-signedprops] Reference validity status: false, Reference URI: [null] Signature is invalid.
How to add keycloak sms authenticator jar file to Keycloak?
I have a Keycloak server and Spring application with Docker. I want use keycloak-sms-authenticator library so I read the documents but did not understand that where is the KEYCLOAK_HOME and I can not add jar files to Keycloak, for configure the sms authenticator. Is there a solution?
RAM and ROM perplexing scenarios
I'm now researching the differences between RAM (Random Access Memory) and ROM (Read-Only Memory), however I've come across several baffling circumstances that have left me wanting clarity. Here's a code example that demonstrates my areas of uncertainty: // Code Snippet 1 (Java) public class Main { public static void main(String[] args) { int[] ramArray = new int[5]; for (int i = 0; i < 5; i++) { ramArray[i] = i; } System.out.println("Data stored in RAM: " + ramArray[5]); } } Here are the specific issues I'm seeking assistance with: Despite initializing an array in RAM with a size of 5 elements, I encountered unexpected behavior when attempting to access the sixth element ramArray[5] outside the array bounds. Can you explain why this code results in an ArrayIndexOutOfBoundsException, and how does RAM handle such errors? While experimenting with Java, I encountered unexpected results when attempting to print the value of ramArray[5] using System.out.println() . Despite expecting an error due to accessing an out-of-bounds index, I'm unsure about the underlying mechanism responsible for handling this situation in RAM. Could you provide insights into how RAM manages memory access violations? I'm confused about the distinctions between RAM and ROM, particularly in terms of memory storage capacity and data accessibility. Could you explain the contrasts between the two forms of memory and offer instances to demonstrate the differences? While learning Java from this source, I faced difficulties understanding topics such as memory allocation and data retrieval in RAM. What are the differences between RAM and ROM, and what do they mean for developers working on memory-intensive applications? Your exp
How to get pure String value from SQL format in IntelliJ?
I am using Spring Jpa to write the SQL query, the IntelliJ supports me to reformat SQL easy to read. However, when I try to copy this SQL to run in the database, it has a lot of redundant characters I need to remove such as + " \n. How can I do for copying only the value of this query?
Employee name and Job title
Create an interface that contains two JTextFields, a JButton, and three JLabels. When the user types an employee’s first and last names (separated by a space) in a JTextField, the employee’s job title is displayed in a second JTextField. Include two JLabels to describe the JTextFields used for data entry. Also include a third JLabel that displays the employee’s title or an error message if no match is found for the employee. Use parallel arrays to store the employees’ names and job titles.
Springboot error
abstract class ApiSubError { } @Data @EqualsAndHashCode(callSuper = false) @AllArgsConstructor class ApiValidationError extends ApiSubError { private String object; private String field; private Object rejectedValue; private String message; ApiValidationError(String object, String message) { this.object = object; this.message = message; } }
springboot
I am getting this error in postman how to rectify Error: connect ECONNREFUSED 127.0.0.1:2023
How to Add Item into List View from Toast message?
I working an App where In my MainActivity I added Toast message which display highest Loaded events. e.g: In MainActivity Toast.makeText(this, "Load Events" + this.events.size(), Toast.LENGTH_LONG).show(); Now, Next part when above toast message appear on the MainActivity screen it will add that event into SecoendActivity Listview How do i add toast message event into second activity listview? will Mainactivity to SecondActivity?
How to. Find strong location value
String= "quali"; I enter the u the it says u is the 2 position any bud know the and tell me
Read enriched email content type from java
Hi There, We are reading email content from Java servlet program and for the content types text/plain and text/html it is working fine while getting the content from this code for content type as text/html "<pre>String html = (String) bodyPart.getContent();</pre>"...and for text/plain "<pre>result = (String) bodyPart.getContent();</pre>" and converting it to html. Now for the content type text/enriched wrote the below code to retrieve the content "<pre>InputStream is = (InputStream) bodyPart.getContent(); StringWriter writer = new StringWriter(); IOUtils.copy(is, writer); result= writer.toString();</pre>" Here after getting the content it is formatting as paragraph,means complete content coming as one string. Can you please help me to get this in proper html format instead of paragraph. Below is the code which we tried. <pre>private static String getTextFromBodyPart(BodyPart bodyPart) throws IOException, MessagingException { String result = ""; if (bodyPart.isMimeType("text/plain")) { //result = (String) bodyPart.getContent(); result = (String) bodyPart.getContent(); result=txtToHtml(result); } else if (bodyPart.isMimeType("text/html")) { String html = (String) bodyPart.getContent();  
