1. How to check a String is a numeric type in java stackoverflow.comHow would you check if a string was a number before parsing it? |
2. Easiest Way to Check if a Java String Instance Might Hold Spam Data stackoverflow.comI have a process which iterates String instances. Each iteration does few operations on the String instance. At the end the String instance is persisted. Now, I want to add for each iteration ... |
3. If-statement - Check String against variable or variable against String? stackoverflow.comPossible Duplicates: |
4. Checking strings for empty stackoverflow.comVery tired this morning so if this is obvious then thats my excuse !!! i am using a buffered reader to read through a csv file - but i dont want to ... |
5. How do I check if a string is a valid md5 or sha1 checksum string stackoverflow.comI don't want to calculate a file's checksum, just to know if a given string is a valid checksum |
6. One step check for null value & emptiness of a string stackoverflow.comI have a setter method. Then when another (say generate) method is run, I need to check the value of my fields. So in the case of String property, I need to know ... |
7. checking empty string in java stackoverflow.comI dont know whats the wroing with the below code.... I am getting input from textbox and putting the input in a string. If the textbox is empty it will return ... |
8. Checking if two strings are permutations of each other stackoverflow.comHow to determine if two strings are permutations of each other |
9. Check how much a String sounds like another one in Java stackoverflow.comI'd like to know if there is any class in Java able to check, using its own criteria, how much a String is equal to another one. Example :
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10. How to check a string against null in java? stackoverflow.comHow can I check a string against null in java? I am using |
11. How to check that Java String is not all whitespaces stackoverflow.comI want to check that Java String/character array is not just made up of whitespaces. How would I go about doing this in Java. This is a very similar question except it's ... |
12. I'm trying to make a void to check if something is true, and if something is, make a string say something depending on what was true stackoverflow.com |
13. In Java, is it possible to check if a String is only ASCII? stackoverflow.comCharacter.isLetter(c) returns true if the character is a letter. But is there a way to quickly find if a String only contains the base characters of ASCII? |
14. check for vowel in a given string stackoverflow.comI would like to write a program which checks whether or not the input character is a vowel, but I'm not able to input a character with jTextField1. I tried Character.parseChar ... |
15. How do you check whether every word in one string is found in another string? stackoverflow.comLet's say I have a book title and I search for it in a database. The database produces matches, some of which are full matches and some of which are partial ... |
16. Checking containment in a Set of strings in Java stackoverflow.comI have a Set of String[]. I want to check whether this Set contains another String[]. |
17. Java : Parsing a String & Checking for "@" stackoverflow.comHow can i use Pattern.compile to check whether a string contains "@". Something like this->> |
18. Check that word all words from one string exist in the other stackoverflow.comHow can I check that all the words from string #2 exist in String #1? It should be case insensitive and I want exclude all punctuation and special characters during comparison ... |
19. Java need help checking if string is instance stackoverflow.comI have an interface, GenericExpression, that gets extended to create expressions (ie AndExpression, OrExpression etc.). Each GenericExpression implementation has a string that represents it (ie "&", "+", etc.) (stored as a static ... |
20. In java, how can I check the content of the last line in a string made up of many lines? stackoverflow.comI'm reading a text file made up of many lines line by line and converting it into a string. |
21. how to check a string is not null stackoverflow.com |
22. What's the better way to check if a String is empty than using String.trim().length() in Java 5/6? stackoverflow.comThere probably is a method to return the index of the first non-blank char in a String in Java5/6. But I cannot find it any more. A code anylizing tool says ... |
23. How do I check for nulls and empty string for a needle in a haystack? stackoverflow.comSituation: I am coming across a lot of checks in my code. And I would like to know of a way in which I can reduce them. |
24. Check if a String is valid UTF-8 encoded in Java stackoverflow.comHow can i check if a string is in valid UTF-8 format? |
25. Checking if a newly submitted string is a valid word stackoverflow.comI have a string , after changing the positions of letters in the string I will be getting new strings, Here I have to use dictionary and check whether the newly ... |
26. How to check how many letters are in a string in java? stackoverflow.comA) How do you check how many letters are in a Java string? B) How do you check what letter is in a certain postition in the string (i.e, the second letter ... |
27. Do I need to check null on both sides of an OR condition? stackoverflow.comConsider member variable: setFoo if foo has not previously been set or currently is empty.
For this purpose, I am not sure if this is sufficient:
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28. Apache's StringUtils.isBlank(str) vs. Guava's Strings.isNullOrEmpty(str): Should you routinely check for whitespace? stackoverflow.comIs there any advantage in using |
29. "Null variable checking" in String stackoverflow.comGenerally, is there a difference between myStrVar is null?
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30. String null check stackoverflow.comI have tried this for 2 hours , but I've given up. I am checking the value of a String this way: |
32. I am looking java code to check String is Valid XHTML or not stackoverflow.comexample |
33. How to parse strings safely? stackoverflow.comWe know that using string concatenation to form SQL queries renders a program vulnerable to SQL injection. I usually get around that by using parameter features provided by the API of ... |
34. check the value of a word inside a string stackoverflow.comI have a string like Score is higher/equal/lower than 0.
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35. How to check whether the string is in encoded form or not stackoverflow.comI have a method inside that i am encode the input string,and then i check the value with the my data base value(stored in the encoded form), |
36. check for null charecter in a string bytes.comi want to know can we use array index value for string operation? No, you cannot. A string is a string and has string methods etc, an array is an array ... |
37. Checking string coderanch.comHi I retrieve data(String values of X column) from Database. Data in database will be any of the three a. "NULL" b. some value c. nothing(blank) note: blank refers to empty not blank space I need to set values based on the data(String) received like If the value is not null if(data!=null or when data is empty) x="y"; I am facing ... |
38. how to check for specific string pattern(using jdk 131) coderanch.comYou could also copy the string to a string buffer and delete all the non-alpha characters then check for POBox using indexOf. Without regex, there's no simple way to do it. Another possibility is to construct an array of strings with each element containing one possible permutation of "PO Box", then use indexOf from either String or StringBuffer to see if ... |
39. Check Code for HardCoded Strings coderanch.com |
40. Check For Strings coderanch.com |
41. Check for String coderanch.comHi Bhuvana, This sounds like maybe a programming assignment, so i will give you a couple ideas but won't give you the code. You are on the right track using substring. if you know that a comma is at position p in String s, then you can use s.substring(p+1) to give you the part of the String that is to the ... |
42. Should be easy... checking for null in String error coderanch.comThanks for the responses. I do acutally like the try/catch solution the best, since I just found out the problem is actually that the value null is "null". Somewhere someone is initializing the value to the string "null". Nobody knows why. So the value isn't null afterall which falls right into your response. There is some nervousness about implementing something like ... |
43. Check String for null without error? coderanch.comHello All, Ok i need to ask a stupid question. How would you go about checking a string for null without getting an exception. The error is caused by this type of check. ----------------------Error Code------------------------- String ABC = req.GetParameter("FieldABC"); if (ABC.equals(null)) { ABC = "Empty Field"; } ----------------------End----------------------- Now it could be done like this but its ugly. ---------------------Ugly Code------------------ String ... |
44. How to check if String() value is numeric coderanch.comHello, I have a situation where I want to validate whether the value passed in as a String() is a numeric v. alpha/special char value. The process that will consume this data post-validation will be expecting numeric values. Can someone give me a hint with how to do this without using a NumberFormatException? If the Exception is encountered the only recovery ... |
45. checking if String is numeric coderanch.com |
46. how to check whether a string is null or not coderanch.comhello CR, thanks for the notification. yes.. if the requirement is to deal with only a NON-EMPTY string (blankspaces not to be considered), trim() can be used before finding its length. trim() is used to get the string by omitting the whitespaces at both the ends [ April 16, 2007: Message edited by: Raghavan Muthu ] |
47. Checking the value of a string coderanch.comI am trying to complete exercise 5-4 of the SCJP study guide and have hit a problem when trying to check the value of the first parameter supplied on the command line when running the program. I have coded the class thus: class MyException { static String checkFood(String instring) throws BadFoodException { if (instring == "Good") { System.out.println("The food is good"); ... |
48. Check for null string coderanch.com |
49. Checking for empty(?) string coderanch.comYou should almost never do string comparisons with the == or != operators. Use the String.equals() method instead. This is discussed often here so you should be able to find a more detailed explanation with the search tool. This is also covered at the beginning of almost every book on Java that I've ever seen. |
50. How to check whether string is null or not ? coderanch.com |
51. Checking a string coderanch.com[Pull Rank] Please, Ravi, and James, don't be annoyed with me. We're all here to learn, so when responding to others, please focus on helping them discover their own solutions, instead of simply providing answers. That is what it says on the entry page to the beginner's forum. It is much better to give a hint, which Maja Grajewska will find, ... |
52. check for NOT AND OR in a string coderanch.com |
53. How to set a string to be null and then check it? coderanch.com |
54. How to check for a particular word in a string. coderanch.comI have to do validation for a string passed in a particular field in a jsp.The string that is passed must not contain words like "script","delete","insert" etc.If these words are somehow found in the string then I will redirect the current page to an error page.Now I will have to use a java class file which will compare the strings passed ... |
55. Check if a String has alphabets coderanch.com |
56. check string inside string java-forums.orgi know i could prolly do a variation of string.indexof whereby i check to see if 1 is in there and 2 is in there and 3 and then return a true, but is there another way? just checking to see if there is a more pro way of doing it tbh |
57. Check if string is numbe java-forums.orgHi, Do you get the answer already? Or you can try in such way : public static boolean isFamName(String b){ if(b.length()==0||b==null){ System.out.println("Please enter your family name correctly?"); return false; }else{ return true; }//close if-else statement }//close isFamName And since when user input String b is empty, then you will println to user to key in family name correctly and also return ... |
58. Java method that check brackets in String are matched? java-forums.org |
59. Checking The Contents of a String java-forums.orgActually there is a space between the numerics and the characters. Maybe it just seems lazy but I want to get the number as a whole. Simply put If its "300 dogs" i want to make a calculation based on the fact that they are dogs. The checking if they are dogs is not a problem, its the number before the ... |
60. Checking a string var to an actually string? java-forums.orgSo, I made a random number generator/guessing game just for fun and practice. But I'm stuck.. at the end of the program if you guessed wrong it asks you if you want to try again. I have a string var and I'm trying to check if it is equal to the word "Yes", and if it is then run the program ... |
61. checking length of string from command line arguments forums.oracle.com)); 5. } 6.} When I compile, I get an error message on line 4: The method length(String) is undefined for the type weekdays. From what I understand, args is an array of strings taken from command line arguments. So I believe, that I am asking for the length of the string, when I say: length(args). Also, the length() method is ... |
62. String valid check forums.oracle.com |
63. how to check if the element of the list references a string forums.oracle.comThanks Im not sure if this is what I was looking for. I just want to check if an element of my list is of a type String or not. I have created something like this but it returns an error "unexpected type" any idea why?: public boolean hasName() { for (Employee employeeLis:employeeList) { if(employeeLis.getFirstName().getClass().getName()="[Ljava.lang.String"); {return true; |
64. Need help with getting string from user and checking it forums.oracle.com |
65. Check if string has changed? forums.oracle.com |
66. check if string is unique forums.oracle.comHi all, What i need to do is check if a value entered is unique i.e. that it hasn't been entered before. I have a buffered reader to get the input, which is then stored as a string. I just need to manipulate this string. If someone could tell me what to add to my code to add this functionality it ... |
67. Hi:how can i check a perticular string has alpha numeric or not forums.oracle.com |
68. checking string for digits forums.oracle.com |
69. Checking string value forums.oracle.com |
70. string index out of bounds... issue regarding checking for non-integers forums.oracle.com |
71. String check forums.oracle.com |
72. To check the sub string forums.oracle.com |
73. Checking a string value/type. forums.oracle.comIs there a way of checking that a string is a certain type. example... I have argstrings a i want to make sure only numbers are outputted. I know how to convert the string to an int. value, but im not sure how to check if the string is actually something else (such as "abc"). cheers in advance |
74. set string to be null and then check it forums.oracle.comJavaMessi wrote: you get the key point already, that should more than enough. The hell I do. What line causes the NullPointerException to be thrown? What is the actual question? As you probably know, programming is an exercise in precision for if you're not precise with the grammar, spelling and capitalization of the code you attempt to compile, you will not ... |
75. Checking end of a String forums.oracle.comI have a relatively simple question, but I've been looking since yesterday and can't find the answer to my question. I'm writing a program that reads a sentence using a dialog box. Depending on the last character of the sentence, output another dialog box identifying the sentence as declarative ( ends with a period ), interrogative ( ends with a question ... |
76. How to check if entered String is not a double/int? forums.oracle.comSo, in a calculator program, how to check that the input string consists of just numbers? Because when trying to parse into a double non numbers crashes the program... id like it to loop back to asking the number again. I was trying to do a check via a while and a for loop with no luck =/ |
77. Checking for empty strings forums.oracle.com |
78. java - how to check if a string is null forums.oracle.com |
79. "Properly" checking if a string is only digits forums.oracle.comHi, Whats the best way to check a string if it contains any digits only? Right now I am doing the below code snippet which works if the user types in whole digits. But it obviously fails to give me the correct boolean when someone types decimals. I could always do a replace all of the decimal but wanted to know ... |
80. String Language Checking forums.oracle.comHi, what is the best way to check that a certain string matchs a certain language, for example i have user input name (String) where i need to validate that its Arabic, is it recommended to use the uni-code ranges checking, or is there a better way of doing so. Thanks in advance |
81. How to check for double quote in a string? forums.oracle.comHi All, I am working on a bug and while analyzing it found that if the String does not have double quotes,then the logic fails.So can someone please tell me is there an efficient way of checking to see if the String contains double quotes at the beginning and at the end? If the double quotes does not exist,I should be ... |
82. Check if string follows a pattern. forums.oracle.com |
83. String fomart check forums.oracle.comHi, I have to process a string for a specific format. Basically, need to check if it confirms to the given format. The string I usually get is a numeric string. However might get some invalid values. Format: "DDD.D" , where D is any digit from [0-9] Input is String Output: boolean "100.1" ---> true <----- "1.123" ---->false "-23" ----->false "java2" ... |
84. Need to check the value after second comma (,)in a string. forums.oracle.com |
85. Check for NOT, AND and OR in a string forums.oracle.comif more > 2 of them are present, then throw an error message. If any of them are at the beginning/end of a string, then throw an error message. As per the spec, they should be only in the middle of a string.Eg: jp OR chase OR morgan AND jp OR morgan AND trust - not permitted. |
86. Checking for nulls -> creating a string -> can't access the string value! forums.oracle.comThanks for reading this. I have a small project where I need to read an XML file that is created by another application. Sometimes some of the XML fields are blank. To prevent errors, I check to see if the specific XML field has a value or not. If there is no value (in this case value6), I set the String ... |
87. How to delay or wait before checking a String's length? forums.oracle.comHi everyone, new to the forums and first time post here. Please excuse me if I haven't picked the right place to post this. I am writing a small simple program to read a scanned barcode number (it is emulated as keyboard, so no need to get fancy here). So far I have my program using a "Key Released" event to ... |
88. how can i check whether a string is a 'white' string? forums.oracle.com |
89. Checking Content Of A String ? forums.oracle.com |
90. Checking a String value forums.oracle.comIt sounds like you need a isEatable(String input) method. In that method you can check if the input passed in is eatable or not. In your case you could store a list of eatable items somewhere and check if the current item is eatable or not. If you wantalso say thigns like "everything that has cookie in ti is eatbale" you'll ... |
91. How to check string... forums.oracle.comHello all! Im writing a scrabble program and i need to filter results So far ive filtered it down to if it contains 1 of my characters on my rack. Now i need to filter it again, if it contains 2(or more) characters.(i can get rid of my first filter if i figure this one out :P) Im just wondering how ... |
92. Way to check if a string has something I want? forums.oracle.com |
93. Check if a String is in UTF8 forums.oracle.comI understand all of that. The only difference I see is that you consider the physical representation and I consider the logical representation. It makes little or no difference to the answer to the OP's question whether one considers the physical or logical view. The answer is still that UTF-8 does not come into the definition of Java Strings. |
94. How to check if string is valid? forums.oracle.comyou could always parse it with the Integer class within a try/catch block, and if it passes parsing, it's valid, otherwise it's not. Also, your delimiter looks more like a comma (,) than a period (.). I'd recommend sticking with a comma since it's a more common delimiter. I'd then use String.split(",") to get an array of String, trim them, check ... |
95. how to check for the amount of lowercase letters in a given string? forums.oracle.com |
96. In Java, is it possible to check string startsWith with a List? forums.oracle.comHi All, for example i am having a string called "ONE". I'm having a list which has "ONE", "TWO", "THREE", "FOUR" etc., Now i want to check whether "ONE" is startsWith any one the string specified in the java.util.List. In my case, it has to return true if "ONE" is given. if i give "NINE" it has to return false. How ... |
97. Checking a range of strings forums.oracle.comThanks, but is there any other way without parsing the String, What if I have 2 strings without numbers such as Apple and Pear and want to see if banana falls ins that range, which in my case would since it is going by alphabetical. Is there a number representation you can get from a string? |
98. String Checking forums.oracle.comHi, i have a problem with password checking. my password do have some constraints. first, it can contain lower character, but this is not a must. But, when the password contains lower characters, it is limited to [abcde]. second, it must contain a number, with minimum occurence one. the number have to be [1-9]. examples : "abc" invalid (doesnt contains number) ... |
99. Ways to check a string for null. forums.oracle.com |
100. How to check return NULL with String forums.oracle.comcatch { // print(error message); whatever } If you're going to catch an exception, you should actually handle it. Just catching and logging lets the program go on as if nothing were wrong. Don't bother catching it if you're not going to do somethign about it. Now that you've caught it, your method is still going to complete normally, so you ... |