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ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”

From the Java 11 BigDecimal docs: When a MathContext object is supplied with a precision setting of 0 (for example, MathContext.UNLIMITED), arithmetic operations are exact, as are the arithmetic methods which take no MathContext object. (This is the only behavior that was supported in releases prior to 5.) As a corollary of computing the exact result, the rounding mode setting of a MathContext object with … Read more

it throws me error incompatible types: unexpected return value — return 10; please correct it make note where i am doing wrong code?

void means the method cannot return any value. if you wish to quit the application with exit code you can use System.exit(). refer Can a main method in Java return something?

Simple Dropdown menu in Java

use frame.setLayout(null); this will allow you to place the Label, Button etc. where you like

Java Currency Number format

I doubt it. The problem is that 100 is never 100 if it’s a float, it’s normally 99.9999999999 or 100.0000001 or something like that. If you do want to format it that way, you have to define an epsilon, that is, a maximum distance from an integer number, and use integer formatting if the difference … Read more

“com.jcraft.jsch.JSchException: Auth fail” with working passwords

Tracing the root cause, i finally found that the public key of type dsa is not added to the authorized keys on remote server. Appending the same worked for me. The ssh was working with rsa key, causing me to look back in my code. thanks everyone.

Working Soap client example

To implement simple SOAP clients in Java, you can use the SAAJ framework (it is shipped with JSE 1.6 and above, but removed again in Java 11): SOAP with Attachments API for Java (SAAJ) is mainly used for dealing directly with SOAP Request/Response messages which happens behind the scenes in any Web Service API. It allows … Read more

IDEA: javac: source release 1.7 requires target release 1.7

Most likely you have incorrect compiler options imported from Maven here: Also check project and module bytecode (target) version settings outlined on the screenshot. Other places where the source language level is configured: Project Structure | Project Project Structure | Modules (check every module) | Sources Maven default language level is 1.5 (5.0), you will see this version as the Module language level … Read more

Running Command Line in Java

http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html

Is spring default scope singleton or not?

Spring’s default scope is singleton. It’s just that your idea of what it means to be a singleton doesn’t match how Spring defines singletons. If you tell Spring to make two separate beans with different ids and the same class, then you get two separate beans, each with singleton scope. All singleton scope means is that when … Read more

Why is my method undefined for the type object?

Change your main to: When you declare Object EchoServer0; you have a few mistakes. EchoServer0 is of type Object, therefore it doesn’t have the method listen(). You will also need to create an instance of it with new. Another problem, this is only regarding naming conventions, you should call your variables starting by lower case letters, echoServer0 instead … Read more

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