Mr.Humorous 🥘

Nothing is impossible, the word itself says 'I'm possible'❗️ 💪

Session Attributes in Spring MVC

Understanding Session Attributes in Spring MVC

1. Overview When developing web applications, we often need to refer to the same attributes in several views. For example, we may have shopping cart contents that need to be displayed on multiple ...

Posted by Mr.Humorous 🥘 on December 13, 2018

Difference between application/x-www-form-urlencoded and multipart/form-data in HTTP/HTML?

Understanding x-www-form-urlencoded and multipart/form-data

1. General Overview Recently in one of the Java web developer interview, one of my readers asked about the difference between x-www-form-url-encoded and multipart/form-data MIME types. In HTTP, th...

Posted by Mr.Humorous 🥘 on December 13, 2018

How Lambdas and Anonymous Inner Classes Work

Understanding Lambdas and Anonymous Inner Classes

1. Key Points Lambdas implement a functional interface. Anonymous Inner Classes can extend a class or implement an interface with any number of methods. Variables – Lambdas can only access ...

Posted by Mr.Humorous 🥘 on December 11, 2018

Spring Interceptor vs. Filter

Understanding the difference between spring interceptor and filter

1. Difference Overview Filter Interceptor Summary Filter 接口定义在 javax.servlet 包中 接口 HandlerInterceptor 定义在org.springframework.web.servlet 包中 ...

Posted by Mr.Humorous 🥘 on December 10, 2018

Java Shutdown Hook

Examples of Runtime.addShutdownHook()

Java shutdown hook are handy to run some code when program exit. We can use java.lang.Runtime.addShutdownHook(Thread t) method to add a shutdown hook in the JVM. 1. Java Shutdown Hook Java shutdo...

Posted by Mr.Humorous 🥘 on December 10, 2018

Java Equivalents of Malloc(), new, free(), and delete

Memory management operators in Java

1. The delete operator in Java…? Java has no direct equivalent of delete. That is, there is no call that you can make to tell the JVM to “deallocate this object”. It is up to the JVM to work out w...

Posted by Mr.Humorous 🥘 on December 10, 2018

Checked vs Unchecked Exceptions in Java

Understanding what checked and unchecked exceptions are

In Java, there are two types of exceptions: 1. Checked Exceptions Checked: are the exceptions that are checked at compile time. If some code within a method throws a checked exception, then the me...

Posted by Mr.Humorous 🥘 on November 21, 2018

Charset and Encodings

Understanding Charset and Encodings

1. Charset Charset is a combination of a coded character set and a character-encoding scheme. A character set is a defined list of characters recognized by the computer hardware and software. Each ...

Posted by Mr.Humorous 🥘 on November 21, 2018

Meet Apache Tomcat Catalina

Brief introduction to Apache Tomcat Catalina

1. Meet Tomcat Catalina Apache Tomcat is a widely used implementation of the Java Servlet Specification, which composes a number of components, including a Tomcat JSP engine and a variety of differ...

Posted by Mr.Humorous 🥘 on November 21, 2018

String Conversion in Java

Understanding explicit and automatic String conversion in Java

1. Explicit vs Automatic String Conversion Explicit String conversion ways include: Use of the toString() method of an object, especially wrapper classes. Use of the static overloaded method S...

Posted by Mr.Humorous 🥘 on November 19, 2018

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