Cargo Surabaya | Ekspedisi Vendor Langsung

HTML is the core of the web, all the pages you see on the internet are HTML, whether they are dynamically generated by JavaScript, JSP, PHP, ASP or any other web technology. Your browser actually parse HTML and render it for you. But what would you do,  if you need to parse an HTML document and find some elements,  tags, attributes or check if a particular element exists or not from Java program. If you have been in Java programming for some years, I am sure you have done some XML parsing work using parsers like DOM and SAX, but there is also good chance that you have not done any HTML parsing work. Ironically, there are few instances when you need to parse HTML documents from core Java application, which doesn't include Servlet and other Java web technologies. To make the matter worse, there is no HTTP or HTML library in core JDK as well; or at least I am not aware of that. That's why when it comes to parsing an HTML file , many Java programmers had to look at Google to find ...

There are two types of variables in Java, primitive and reference type. All the basic types e.g. int, boolean, char, short, float, long and double are known as primitive types. JVM treats them differently than reference types, which is used to point objects e.g. String, Thread, File, and others. Reference variables are not pointers but a handle to the object which is created in heap memory. The main difference between primitive and reference type is that primitive type always has a value, it can never be null but reference type can be null, which denotes the absence of value. So if you create a primitive variable of type int and forget to initialize it then it's value would be 0, the default value of integral type in Java, but a reference variable by default has a null value, which means no reference is assigned to it. If you try to access any field or invoke a method on a null reference, you will be greeted with NullPointerException in Java. It's very important for eve...

JSTL forTokens tag is another tag in core JSTL library to support Iteration or looping. It effectively compliments, more useful <c:forEach> tag, by allowing you to iterate over comma-separated or any delimited String. You can use this tag to split string in JSP and can operate on them individually. forTokens tag has similar attributes like forEach JSTL tag except one more attribute called delims, which specifies delimiter. For example to iterate over colon-separated String "abc:cde:fgh:ijk", delims=":". By the way, forTokens tag also accept multiple delimiters, which means, you can split a big string into token-based upon multiple delimiter e.g. colon(:) and pipe (|), This will be more clear, when we will see examples of JSTL forTokens tag in JSP. Rest of attribute e.g. items, var, varStatus, begin, end and step are same, as they are in case of <c:forEach> tag. For quick review, items specify String which needs to be split-ed in token and var hold curren...