In my quest to correctly grasp Interface best practices, I have noticed declarations such as:
List<String> myList = new ArrayList<String>();
instead of
ArrayList<String> myList = new ArrayList<String>();
-To my understanding the reason is because it allows flexibility in case one day you do not want to implement an ArrayList but maybe another type of list.
With t...
It seems to me that calling string.length() each time takes significantly longer than just accessing a variable.
StringBuffer sb1 = new StringBuffer("Java");
StringBuffer sb2 = new StringBuffer("Java");
System.out.println(sb1 == sb2);
System.out.println(sb1.equals(sb2));
Here both are returning false. How is it possible?
I seek an example of applying a regular expression to a Java I/O stream that doesn't simply convert the stream to a string as I would like to preserve binary data. Most of the examples on the Internet focus on text data...
I'm reading in a file which I can't buffer all at once, as its size ranges from 256MB upto ~2GB in size.
Once the file is opened, I read a chunk of it into a byte array, say 512 bytes, run a regex over it, and if the pattern is detected, my program makes a note of it.
The problem I'm having is that my program is missing a lot of the locations in the file where it should be detecting the patte...
What is the difference between CharSequence[] and String[]?
In a program I am writing I am doing a lot of string manipulation. I am trying to increase performance and am wondering if using char arrays would show a decent performance increase. Any suggestions?
Why is CharSequence from the Java API an interface? What is the significance of this interface?
I'm having trouble creating a simple app, I created a variable that changes when you click a button, but I would like to know how to set my TextView to that variable.
total is my TextView, and count is my variable.
I am trying
total.setText(count);
I dont know how to tell it to just take the value of count and set the text to that.
Any help would be greatly appreciated.
Why are interfaces useful?
Actually, I have a [small] idea of why interfaces are useful/necessary but...
What are [interesting or realistic] applications of interfaces?
I am trying to read a UTF8 string via a java.nio.ByteBuffer. The size is an unsinged int, which, of course, Java doesn't have. I have read the value into a long so that I have the value.
The next issue I have is that I cannot create an array of bytes with the long, and casting he long back to an int will cause it to be signed.
I also tried using limit() on the buffer, but again it works wit...
How can I convert a Java CharSequence to a String?
I am looking for XML/XHTML Java library/framework that can perform the following two tasks for me.
Before going on few definitions:
NodeOffset(Node node, int offset) marks some point in text node in the XML tree.
nodeB, nodeI, nodeP are the corresponding Node instances of the below mentioned XHTML tree and nodeSpan is some newly created node (where Node is not necessarily org.w3c.dom.Node an...
Is there a Way to converte a Charsequence or a String to an Ingeter?
CharSequence cs = "123";
int number = (int) cs;
I'm a Noob. Solution:
CharSequence cs = "123";
int number = Integer.parseInt(cs);
I have 40KB HTML page and I want to find certain patterns in it.
I can read it by 1K buffer but I want to avoid situation that pattern that I'm searching would be split between two buffer reads.
How to overcome this problem?
Possible Duplicate:
String, StringBuffer, and StringBuilder
What are common methods between String and StringBuffer? And what is the difference between string and string buffer?
one way to initialize charsequence[] is
charsequence[] item = {"abc","def"};
but i don't want to initialize it this way. can someone please suggest some other way like the way we initialize string[] array...
thanks
Here I am downloading a web-page source code then storing it in text file. Then I read that file and match it with a regex to search for a specific string.
There is no compiler error.
Exception in thread "main" java.lang.NoClassDefFoundError: java/lang/CharSequence
Can anybody tell me Where I am wrong.
java version "1.3.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_01...
