1. StringBuilder and StringBuffer in Java stackoverflow.comWhat is the main difference between StringBuffer and StringBuilder? Is there any performance issues when deciding on any one of these? |
2. How is a StringBuffer passing data through voids with no fields in the Class? stackoverflow.comGiven: Class has no fields, every variable is local. littleString was created by refactoring bigString in Eclipse: |
3. How to get adress of a Java Object? stackoverflow.comIs there a way to get address of a Java object? Where the question comes from?: At First, I read properties file and all the data from file was placed into table. ... |
4. Strings are immutable - that means I should never use += and only StringBuffer? stackoverflow.comStrings 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 ... |
5. what is the difference between String and StringBuffer in java? stackoverflow.comwhat is the difference between String and StringBuffer in java? is there maximum size for String? |
6. How to Reassign value of StringBuffer? stackoverflow.comHow can we re assign the value of a StringBuffer or StringBuilder Variable? |
7. what is the difference between StringBuilder and Stringbuffer? stackoverflow.comPossible Duplicate:what is the difference between StringBuilder and Stringbuffer? |
8. String, StringBuffer, and StringBuilder stackoverflow.comPlease tell me a real time situation to compare |
9. java StringBuffer and String Comparision stackoverflow.comWhy String.equls() returns true but Stringbuilder.equals() returns false? |
10. remove certain lines from a StringBuffer stackoverflow.comA legacy app program has a huge String Buffer (size sometimes upto an Mb) and it is processed sequentially for modifying the contents. I have to implement a change wherein I ... |
11. Using String or StringBuffer in Java: which is better? stackoverflow.comI read a lot about using StringBuffer and String especially where concatenation is concerned in Java and whether one is thread safe or not. So, in various Java methods, which should be ... |
12. StringBuffer Object Problem stackoverflow.com |
13. StringBuffer vs StringBuilder Vs StringTokenizer stackoverflow.comwhat is the difference between the StringBuffer vs StringBuilder Vs StringTokenizer on the internal implementation. when to use these . kindly waiting for the answer. Update:-I am also going through the source ... |
14. Java StringBuffer questions stackoverflow.com |
15. String or StringBuffer stackoverflow.com |
16. What's a real-world example of using StringBuffer? stackoverflow.comI'm using Java 6. I've only written a couple of multi-threaded applications so I've never encountered a time when I had several threads accessing the same StringBuffer. Could somebody give me a real ... |
17. Difference between StringBuffer and StringBuilder class stackoverflow.comI could get more on the internet and from Sun Java. But needed to get the clear difference with the help of an example?
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18. String, StringBuffer, StringBuilder. What were they thinking? What are we thinking? stackoverflow.comImportant: I know the differences between them, is a question related to the architecture of the plataform and some design decisions. Have you ever thought about the "semantic" implications in this changes ... |
19. Storing StringBuffer stackoverflow.comI have a StringBuffer in my Class which deletes certain characters if the conditions are met in the IF statement and prints the statement. However, this could be repeated many times. ... |
20. Can java.lang.StringBuffer be replaced by the "regular" string manipulation logic in ColdFusion? stackoverflow.comI am not an expert in Java; I am hoping that someone on this list who are more proficient in Java can help me out. I have the following codes on my ... |
21. StringBuffer is obsolete? stackoverflow.comIn the book "Effective Java", Josh Bloch says that StringBuffer is largely obsolete and should be replaced by the non-synchronized implementation 'StringBuilder'. But in my experience, I've still ... |
22. What is the complexity of this simple piece of code? stackoverflow.comI'm pasting this text from an ebook I have. It says the complexity if O(n2) and also gives an explanation for it, but I fail to see how. Question: What is the ... |
23. fixed-length StringBuffer in java stackoverflow.comwhat is the best practise to hold a stringbuffer length fixed in java ? That is if the fixed value is 10 and stringbuffer holds ABCDEFGHIJ, when we append K ... |
24. Storing in String stackoverflow.comPossible Duplicate:I have 3 different words listed in property file ... |
25. StringBuffer behavior for NULL objects stackoverflow.comI am not able to understand the following behavior of StringBuilder when NULL objects are appended to an instance: |
26. String and StringBuffer coderanch.comHi, As we all know that String class creates immutable strings and if we modify a string then a new string object is created that contains the modifications But creating new objects everytime uses more memory. I want to know that then why do we always use String class and not StringBuffer? thanx.. Nidhi |
27. String Vs Stringbuffer coderanch.com |
28. StringBuffer problem coderanch.com |
29. About String & StringBuffer coderanch.comHowdy! Yeah, it looks like you found yourself a one-way ticket to compiler hell! I'd say tryin' this instead: public class AQuestion{ public void method(StringBuffer s){ if(s.toString().equals("")) System.out.println("StringBuffer is null"); else System.out.println("StringBuffer is not null"); } public void method(String s){ if(s.equals("")) System.out.println("String is null"); else System.out.println("String is not null"); } public static void main(String args[]){ AQuestion question = new AQuestion(); question.method(new ... |
30. Ya got String, got StringBuffer - and now ya got StringBuilder! coderanch.comStingBuffer is like Vector. Most of the time the synchronization is unnecessary; when it is necessary, it's probably at the wrong level. (I.e. you probably need synchronization in a higher-level sync block, if you need it at all.) In most code the difference in performance is probably negligible. However since standard libraries sometimes need to be called many times in a ... |
31. using plus inside StringBuffer coderanch.comSure ... The + operator to concatenate two String objects. The + operator appears innocent, but the code generated produces some surprises. Using a StringBuffer for concatenation can in fact produce code that is significantly faster than using a String. To discover why this is the case, we must examine the generated bytecode from our two examples. The bytecode for the ... |
32. String and StringBuffer coderanch.comI realize there is some benefit to constructing long Strings by using a StringBuffer object and then calling toString(), rather than repeatedly concatenating String objects. I'm wondering though, if there is some rule about how many Strings are being concatenated that makes it easier to decide if I should use the StringBuffer method. If I'm just concatenating two strings, is it ... |
33. StringBuffer truncated coderanch.comHi all, need your help! we have a servlet that generate html. it uses StringBuffer with around 7500 character and it gets truncated. well, the system already implemented - so don't what the story and I have been asked to debug this damn thing. any idea how to fix this?? is it a bug? thanks folks tony |
34. String and StringBuffer::: null coderanch.comString is a rare class in Java. It's allowed to straddle the line between behaving as an object (using new() ) and behaving as a primitive )using direct assignment. The designers knew String objects would be prominent in almost any program. To conserve the run-time cost of creating them, they chose to allow static String assignments. Static assignments are ... |
35. StringBuffer coderanch.comHi, Could anyone please mail be which one would be better of the below two in performance. How many strings will be created in Method1 and how many in Method2? Thanks in advance. Method - 1 String b = "beta"; StringBuffer buf = new StringBuffer("The strings are "); buf.append("a"+ b + "c"); Method - 2 String b = "beta"; StringBuffer buf ... |
36. Easy stringbuffer questions coderanch.comI have legacy code where this is done often: StringBuffer sqlStmt= new StringBuffer(""); sqlStmt.append("lots of stuff"); sqlStmt.append...again and again sqlStmt = sqlStmt.delete(0, sqlStmt.length()); sqlStmt.append("lots of stuff"); sqlStmt.append...again and again sqlStmt = sqlStmt.delete(0, sqlStmt.length()); Why use delete? Why not simply: StringBuffer sqlStmt= new StringBuffer(""); sqlStmt.append("lots of stuff"); sqlStmt.append...again and again sqlStmt = new StringBuffer(""); sqlStmt.append("lots of stuff"); sqlStmt.append...again and again sqlStmt = ... |
37. StringBuffer coderanch.comYou need to host the file on some kind of server and transmit it via JSP or Servlets. Have you set up a Java or J2EE servlet before? I'd download and try Tomcat out, then try some JSP writing tutorials. Once you've got that covered you can output the string buffer data pretty easily. Alternatively, if you have a non-java server ... |
38. String or StringBuffer? coderanch.comHi, I have a question on writing a method signature, whether to pass an argument as a String or a StringBuffer? The question is in the lines of the performance and also in the lines of pass by value/reference. Here's the scenario: I'm writing a method to parse an xml and add the XML attributes to a file, And within this ... |
39. StringBuffer in Java coderanch.comHello, I was using a final variable to store a StringBuffer object; I was thinking that Java should not allow me to append that StringBuffer, as the variable that holds this StringBuffer is final. But, I'm surprised to see that Java allows me to do that. See below the example. public final StringBuffer s = new StringBuffer("Text1"); s.append(" Text2"); System.out.println(" S ... |
40. Difference between String and StringBuffer coderanch.comHello everybody, It's amazing to see the help regarding this topic "Difference between String and StringBuffer", Every topic says that String is immutable where as StringBuffer is mutable. But please can any one be more elaborative on this topic. I mean what exactly we can do with StringBufer and we can't with String. A practical explanation will be the best answer ... |
41. why dont we prefer to use StringBuffer coderanch.comThey are different ways of representing String data, so the choice of when to use which depends on your circumstance. The core difference is, I would say, that String objects are immutable whilst StringBuffer objects are mutable. At a very simple level String is best when your data won't change. StringBuffer is best for runtime String concatenation (the compiler will take ... |
42. StringBuffer VS StringBuilder coderanch.comI am a little confused about the difference between StringBuilder and StringBuffer. Practically they both look like they do the same thing and I did Google on this and got this on JGuru : " The StringBuilder class was introduced with JDK 5.0. Essentially, a StringBuffer is a thread-safe version of StringBuilder. If you are only adding/removing characters from a single-thread, ... |
43. StringBuffer coderanch.com |
44. Strings and StringBuffer coderanch.com |
45. usng StringBuffer coderanch.com |
46. String and StringBuffer coderanch.comStringBuffer has a performance advantage when you concatenate a lot of variable parts into one string. You can try some experiments on your target platform to see when "a lot" becomes worth the effort of using a StringBuffer. StringBuffer is also mutable, meaning you can change it, while String is not. Look through the doc and compare methods. What can one ... |
47. StringBuffer problem coderanch.com |
48. Value of using StringBuffer for this example coderanch.comYes - but only one entry, no matter how many times the code is called. The idea that we need to "keep the string literal pool as small as possible" really is not necessary in the vast majority of applications. (Unless maybe you're using String.intern() an awful lot for some reason.) It really isn't something Jared needs to worry about. |
49. StringBuffer is useless ? coderanch.comI suddenly get a new thought here. So assumed that making the string buffer synchronized was of no use which they realized in java 1.5 and going by same idiom we have vector. Here is the text from Java Concurrency in Practise If synchronization is the cure for race conditions, why not just declare every method synchronized? It turns out that ... |
50. StringBuilder slower than StringBuffer!? coderanch.comStringBuilder javadoc API: "Where possible, it is recommended that this class be used in preference to StringBuffer as it will be faster under most implementations." Both StringBuilder and StringBuffer classes extend AbstractStringBuilder class. The methods of StringBuffer are synchronized. Naturally the above statement would make sense and expected. But the below test executed multiple times always gives faster execution times for ... |
51. Cleanup StringBuffer coderanch.comIn answer to the "Heap" posting ... one of the nice things about Java is that you don't have to care (for the most part) about your memory management. The internals do all that for you. The code that I just posted is all that you have to do ... any memory reallocation is done by the JVM. ------------------ Chris Stehno ... |
52. StringBuffer Question coderanch.comBeing new to OO in general, comparing objects is a concept I've been struggling with, so this is a great question. If someone wouldn't mind confirming my thoughts on this I'd appreciate it. sb1 and sb2 are entirely seperate instances of a StringBuffer object complete with their own references and that is why they aren't equal, because the references are different? ... |
53. Why use StringBuffer? coderanch.comI believe that some code like this will be altered by the compiler: String myString1 = "add " + "all " + "these " + "bits " + "together"; //gets interpreted as: StringBuffer tempBuffer = new tringBuffer(); tempBuffer.append("add "); tempBuffer.append("all "); tempBuffer.append("these "); tempBuffer.append("bits "); tempBuffer.append("together."); and this is fine, since it's more efficient but happens under the covers so you ... |
54. StringBuffer Very Urgent please coderanch.com |
55. StringBuffer question coderanch.com |
56. When The default value of "StringBuffer" is fill? coderanch.comHi again Danish, Ok, let's take another crack at this. Are you asking why SUN in it's infinite wisdom decided to allocate a default buffer with a 16 char capacity? If that's your question, I have no earthly, freakin' idea, but I suspect it went something like this: System engineer dude 1: "Hey Joe how may char's should the initial buffer ... |
57. StringBuffer coderanch.com |
58. String & StringBuffer coderanch.com |
59. Stringbuffer vs. String coderanch.comStrings are immutable, which means that you can not change their contents. This is very useful for things that represent "primitive" kinds of values, like numbers and strings and such. It allows you do to something like: String myString = "Hello World"; yourMethod( myString ); Because the string is immutable, I know that no matter how hard you try (or how ... |
60. StringBuffer Question coderanch.comI need to delete all characters in a StringBuffer from the beginning through the first occurance of a newline character. Essentially, I am deleting the first line. I am aware of the delete method that takes the start and end, but I do not know how to determine the end index, or the first occurrance of the newline. There does not ... |
61. StringBuffer coderanch.com |
62. Max length/capacity for StringBuffer coderanch.com |
63. About "StringBuffer" coderanch.com |
64. StringBuffer problem coderanch.com |
65. StringBuffer holding value coderanch.comHey everybody. It's been a while, but I'm trying to get back on track here... I've read up on the StringBuffer, but I don't understand what's going on here. It might have something to do with the servlet lifecycle - I don't know... Basically what is happening is that my string buffer is holding values that I don't want it to. ... |
66. splitting a StringBuffer into tokens? coderanch.comHello. I'm just getting started with Java and having a bit of difficulty using Strings and StringBuffers. I decided to make a class that would take a string (this was before I knew there two types in Java!) representing a name, split it into its constituent parts, capitalise the first letter of each of these and put them into an array. ... |
67. String and StringBuffer coderanch.comReasons to use String instead of StringBuffer: 1. Many methods that take a String argument don't accept a StringBuffer argument. 2. The String class has many useful methods and constructors not available from StringBuffer. 3. String is handled very efficiently in terms of memory and execution time by most jvm's. Of course, objects that change often should be of class StringBuffer ... |
68. String Vs StringBuffer coderanch.comThe important thing to remember is that: line 1: String a = "1"; line 2: String b = "2"; line 3: a += b; causes the String object referenced by "a" to be dereferenced at line 3, and so eligible for garbage collection (which can be seen as a delayed overhead) and a new String object, to which "a" is pointed, ... |
69. String Vs StringBuffer coderanch.com |
70. Difference between String and StringBuffer coderanch.com |
71. When should I use StringBuffer instead of String? coderanch.comA String is a string. A StringBuffer is a tool for building Strings. When you need to pass an argument to a method named, say, setName(), the argument, presumably a "name", ought to be a String. When you need to return something from a method named, say, getName(), and it's supposed to return the "name" of something, then that method should ... |
72. String >StringBuffer coderanch.compublic class StTest { public static void main(String[] args) { String s1 = new String("Danny"); System.out.println("s1 = " + s1.toUpperCase());//prints DANNY System.out.println("s1 = " + s1);//prints Danny - hasn`t been changed s1=s1.toUpperCase(); //apply change System.out.println(s1); //has kept change StringBuffer sb = new StringBuffer(s1);// value passed DANNY System.out.println("sb = "+sb); //prints DANNY System.out.println("sb reverse = " + sb.reverse());//reverse sb System.out.println( sb ); ... |
73. String and StringBuffer coderanch.com |
74. StringBuffer Confusion????? coderanch.comAlso tell me if i want that comparision of sb1 and sb2 should return true value.......... let me make myself more clearer... I have created two instances of string Buffer and have stored same value in both say "Megha". as they are pointing to different memory locations, but i want to only compare the contains only and as both contain "megha" ... |
75. Problem with StringBuffer coderanch.comIt's almost ( :roll: ) always better to be clear about your context and what your problem is -- what you are trying to do -- than to just ask a specific question about subproblem. It appears that you've had trouble in the past inserting text with embedded single quotes into your database, and as a result of that, you are ... |
76. Clarification required in StringBuffer insert method... coderanch.com |
77. StringBuffer() coderanch.com |
78. doubt in StringBuffer coderanch.comThe soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - ... |
79. What is the advantage of using String over StringBuffer? coderanch.comThank Sharath Kumar for your reply. I think what you have told is the behaviour of string but i want to know the advantage of using String over String Buffer. The thing you have mentioned is that we can't change the String value but that can be achieved by another way of using 'final' keywork to any variable! Hi All, Please ... |
80. String and StringBuffer coderanch.comUsing concatenation operation on String objects are not transparent to the user. As you said, Strings are immutable. That is once a String object is created, it cannot be changed. This is the case even in case of concatenation. The only thing is this is not known to the user. String str1 = "hello "; String str2 = "world "; str1 ... |
81. StringBuffer help coderanch.com |
82. String and StringBuffer coderanch.com |
83. The difference of String and StringBuffer? coderanch.com |
84. StringBuffer coderanch.comHi Ernest Thanks a lot for your description. I am unable to follow the below lines . Is there any chance that you can elobrate it. Now, the designer of this method had an idea which s/he felt was clever. The "append" method doesn't need to return anything; it could just return 'void'. But instead, s/he made it return "this" -- ... |
85. Strings and StringBuffer coderanch.com |
86. Strings and StringBuffer coderanch.comclass Main { public static void main(String[] args) { final int max = 3000; long time = System.currentTimeMillis(); String s = ""; for(int i=0; i |
87. StringBuffer does not have replaceAll coderanch.com |
88. Stringbuffer class? coderanch.com |
89. The Difference Between StringBuffer & StringBuilder coderanch.com |
90. stringbuffer :nullpointerexception coderanch.comimport java.util.*; import java.io.*; public class d7 { private static BufferedReader ifile; private static PrintWriter ofile; private static StringBuffer sb; private static String s0; public static String removepunct(String s) { for(int i = 0;i < s.length();i++) { if(Character.isLetter(s.charAt(i))) sb.append(s.charAt(i));// <- nullpointerexception here! } return sb.toString(); } public static void main(String[] args) throws IOException { BufferedReader ifile = new BufferedReader(new FileReader(args[0])); PrintWriter ... |
91. reg: string and stringbuffer coderanch.com |
92. Can StringBuffer do everything that String does ? coderanch.com |
93. String and StringBuffer coderanch.com |
94. Looping StringBuffer coderanch.comI didn't get you what you are trying to say could you please give small example for my problem it may solve my problem i don't understand why we need to use [code] tags could you please give small example if you have enough time please apologise me if you don't have enough time. |
95. String and StringBuffer coderanch.comBecause String is immutable, the Java compiler can do certain optimizations with it. For example, if you create multiple strings with the same (compile-time constant) value, then the compiler will create only one String object, and make both variables refer to that one String object. This saves memory. This optimization wouldn't be possible if strings would be mutable. |
96. align output with StringBuffer coderanch.comWhen I use printf that is also working fine. But I don't know what is printf(I remember we use it in C) class StringFormatting { public static void main(String[] args) { String ramya="ramya"; String brilliant="brilliant"; String format = "|%1$-30s|%2$-10s|%3$-20s|\n"; //String s = String.format(format, "a", "b", "c"); System.out.printf("%c%20s is %-20s%c", '*', "Campbell", "brilliant", (char)0x2a); System.out.println(); //System.out.printf("%c%10s is %-10s%c", '*', "Ramya", //brilliant", (char)0x2a); ... |
97. regarding StringBuffer coderanch.comAlways use line.separator if you can. The most likely explanation is that there was a tiny spelling error in what you were submitting first time. You know you can get an array of properties from a method in the System class, then you can go through them and get the correct spelling, preferably with copy-and-paste. |
98. String VS StringBuffer coderanch.com |
99. StringBuffer confusion ? coderanch.comIf your stringBuffer contained "Hello. My name is Inigo Montoya.", what would you increment this to? Further, I don't think this is a well defined problem, especially since different character sets may not have letters in the same order, or consecutive letters stored as consecutive integers. And what would you increment a 'z' to? Can you define the problem better? Tell ... |
100. Stringbuffer and carriage return coderanch.comHi All, I am trying to read a file and then save all of its content in one stringbuffer so that I will read the file just once. public static String readFile(File aFile){ StringBuffer sb = new StringBuffer(); BufferedReader reader = null; try { reader = new BufferedReader(new FileReader(aFile)); String strRead = ""; while((strRead = reader.readLine())!=null){ sb.append(strRead); sb.append("\r\n"); } reader.close(); } ... |