stringbuffer

I have follows below XML feed: <Description> <p>Touch, tap, flip, slide! You don't just read Books, you experience it.</p> </Description> Here I have to display the description like Touch,tap,flip,slide! You don 39.just read the Books, you experience it. Here I have handled the parser like: public static String removeHTML(String htmlString) { // Remove HTML tag from java String String noHTMLString = htmlString.replaceAll("\\<.*?\\>", ""); // Remove Carriage return from java String noHTMLString = noHTMLString.replaceAll("\r", "<br/>"); noHTMLString = noHTMLString.replaceAll("<([bip])>.*?</\1>",

Strings are immutable, meaning, once they have been created they cannot be changed. So, does this mean that it would take more memory if you append things with += than if you created a StringBuffer and appended text to that? If you use +=, you would create a new 'object' each time that has to be saved in the memory, wouldn't you? Yes, you will create a new object each time with +=. That doesn't mean it's always the wrong thing to do, however. It depends whether you want that value as a string, or whether you're just going to use it to build the string up further. If you actually want the

I have the following code where I am trying to put the StringBuffer objects as keys in a TreeSet. The reason I do this is to see if I can put mutable objects as keys. I do not get any compile error. but when I run this code, I get the error that is below the code. specially, I get this java.lang.StringBuffer cannot be cast to java.lang.Comparable . what does this error indicate? from javadoc I see that StringBuffer class is declared final ( public final class StringBuffer ), doesn't that mean it is immutable and hence hashable? I am a newbie to the hashing and immutable stuff, so kindly help

I am trying to modify a stringbuffer of a stringstream object without having to copy a string, using the method pubsetbuf, but it is not working. I am following the documentation in http://www.cplusplus.com/reference/iostream/streambuf/pubsetbuf/ . Here is my example code: #include <iostream> #include <sstream> int main(int argc, char* argv[]) { std::stringstream stream("You say goodbye"); char replace[] = {"And I say hello"}; std::cout << stream.str() << std::endl; // Checking original contents stream.rdbuf()->pubsetbuf(replace, 16); // Should set contents here std::cout << stream.str() <<

When I define a StringBuffer variable with new , this string is not added to the String pool, right? Now, when I define another StringBuffer but not with new , I define it as StrPrev.append("XXX") suddenly it is.(or so says my college teacher). Why is that? What makes this string to suddenly become a string-pool string? When I define a StringBuffer variable with new, this string is not added to the String pool, right? Creating a StringBuffer does not create a String at all. Now, when I define another StringBuffer but not with new, I define it as StrPrev.append("XXX") suddenly it is. This is

When I run this code: StringBuffer name = new StringBuffer("stackoverflow.com"); System.out.println("Length: " + name.length() + ", capacity: " + name.capacity()); it gives output: Length: 17, capacity: 33 Obvious length is related to number of characters in string, but I am not sure what capacity is? Is that number of characters that StringBuffer can hold before reallocating space? See: JavaSE 6 java.lang.StringBuffer capacity() But your assumption is correct: The capacity is the amount of storage available for newly inserted characters, beyond which an allocation will occur Yes, you're

Why would the StringBuffer have a limit on its size? I went through some of the links : http://www.coderanch.com/t/540346/java/java/maximum-size-hold-String-buffer . Is that because of the count member variable, which is an int? Suppose that we have 2^31-1 chars in StringBuffer and that we append some more chars to that StringBuffer . Count member variable would be incremented by the number of chars appended and if Count variable is already at its max (2^31-1), it would revert back to some negative value. Why would it throw an error? because stringbuffer internally uses an array and the