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Showing posts with label Java. Show all posts
Showing posts with label Java. Show all posts

package javax.annotation.security does not exist

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We need to include this maven dependecy or JAR in java project to fix the javax.annotation.security does not exist issue. https://mvnrep...

JUnit for Java getter and setter methods

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  POJO class public class ColleagueDetails { private String colleagueID ; private String colleagueEmail ; public ColleagueDetail...

Insufficient Heap Memory

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Issue " Insufficient Heap Memory " Using 64bit VM settings, min.heap=1024MB, min permgen=256MB, default fork arguments=[-Xmx1024m,...

Can we have multiple doGet() or doPost() in a servlet?

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 No, it doesn't make sense to creating multiple doGet() or doPost() methods in a Servlet. The compiler will always execute the first one...

working with enum in Java

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enum Level { LOW ( "A" ), MEDIUM ( "B" ), HIGH ( "C" ); public final String value ; ...

Reading excel data in Java Sprint Boot

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In this article, we will walk through the steps and program which we need to develop to read the excel data in Java program or spring boot a...

Diamond operator is not supported in source

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While running a Java project with IntelliJ, we might face an error stating "diamond operator is not supported in -source 1.5", whi...
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Cast an object to Integer in Java

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We could cast an object that have integer value into an integer using below Java code. int value = Integer.parseInt(object.toString());

How to get the last path segment of an URL using Java

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With any programming language, we come at some point where we need the last segment of the URL to manage and moderate the request and respon...
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Why there is no main method in Servlet?

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A Java Servlet is a plugin to a web server and always run in web container. When we run any program that has main method, the program runs t...