1. The correct way of waiting for strings to become equal stackoverflow.comIn a Swing app a method should continue only after user enters a correct answer. The correct answer is stored in a String with user answer being set by a listener ... |
2. Java String.equals versus == stackoverflow.comThis code separates a string into tokens and stores them in an array of strings, and then compares a variable with the first home ... why isn't it working? |
3. Java string comparison? stackoverflow.comString parts is String[6]: [231, CA-California, Sacramento-155328, aleee, Customer Service Clerk, Alegra Keith.doc.txt]But when I compare parts[0] with "231":
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4. Compare two Java objects with a check for null stackoverflow.comI feel like such a novice for asking this question, but is there a method in the JDK that compares two objects for equality, accounting for nulls? Something like this: |
5. ObjectUtils.equal(x,y) null can work stackoverflow.comObjectUtils.equal(x,y) x if is null can work? |
6. Checking to see if a string is a palindrome with String.equals() stackoverflow.comI had a question regarding a basic program I was writing said whether a word such as racecar is a palindrome or not. All my methods which reverse the string, strip ... |
7. Equivalent of Java's IndexOf() in Scheme? stackoverflow.comI am developing a small program in Scheme but I got stuck. Is there anything similar to Java's indexOf() that I could use in Scheme? |
8. Comparing StringBuffer content with equals stackoverflow.com |
9. How to check if two objects are equal even if they could be null stackoverflow.comSometimes, I see this: a is null, a NullPointerException is thrown. Assuming when a==null and b==null or if just a==b that I would want to do(something). ... |
10. Is "long x = 1/2" equal to 1 or 0, and why? stackoverflow.comif I have something like: |
11. what is c/c++ equivalent way of doing '>>>' as in java (unsigned right shift) stackoverflow.comI wanted to know how i can do '>>>' shifting of java in c/c++. thanks |
12. How to check if my string is equal to null? stackoverflow.comI want to perform some action ONLY IF my string has a meaningful value. So, I tried this. |
13. Java: equivalent to C's strnicmp? (both startsWith and ignoreCase) stackoverflow.comString string1 = "abCdefGhijklMnopQrstuvwYz"; String string2 = "ABC"; I had been using string1.startsWith(string2), which would return false in the above example, but now I need to ignore case ... |
14. Is it a bad idea if equals(null) throws NullPointerException instead? stackoverflow.comThe contract of For any non-null reference valueThis is rather peculiar, because if o1 != ... |
15. What is the java equivalent to javascript's String.fromCharCode? stackoverflow.comWhat it the java equivalent of javascript's: |
16. Strings in Java : equals vs == stackoverflow.com |
17. Should I use string.isEmpty() or "".equals(string)? stackoverflow.comThe title basically says it all. I'm usually testing this alongside a |
18. Java equals() ordering stackoverflow.comIf I try to do a |
19. Demonstrating string comparison with Java stackoverflow.comI want to demonstrate with a few line of code that in Java, that to compare two strings ( |
20. Using '==' instead of .equals for Java strings stackoverflow.comI know this has been asked before, but in spite of recommendations to use |
21. Question about == operator in java stackoverflow.com |
22. String comparison and String interning in Java stackoverflow.comWhen should one compare |
23. equal() and equalsIgnoreCase() return false for equal strings stackoverflow.comI'm working with eclipse IDE (Version: 3.4.2) on a mac and I have met the following issue. When comparing between strings using equal() or equalsIgnoreCase() methods I receive false even when the ... |
24. Java null check why use == instead of .equals() stackoverflow.comIn Java I am told that when doing a null check one should use == instead of .equals(). What are the reasons for this? |
25. Comparing two java objects on fly (data type not known) stackoverflow.comI need to compare different data objects. Can any one tell me how can i do this. I don't know what are the data types i will get priorly. If i need ... |
26. Difference between isEmpty and equals("") stackoverflow.comPossible Duplicate:I am wondering, what difference is there between isEmpty and equals("")? They would appear to be the exact ... |
27. In JDK 1.6, can String equals operation can be replaced with ==? stackoverflow.comAs I study the source code of some open source products, I find code like: a is a String variable. Can a String equals operation be replaced with ==?
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28. String .equals opposite stackoverflow.comI have this line of code: |
29. Equal strings aren't equal (==) in Java? stackoverflow.comPossible Duplicate:Hi guys, why is this Java code not working correctly (the if statement is always being read ... |
30. Problem with equals Strings in Java stackoverflow.comI have two "equal" Strings. When I print both Strings they look exactly the same in the screen. But when I compare the Strings the result is "false" and using .length ... |
31. null and the symmetry of equals stackoverflow.comEquality is supposed to be symmetric, right? NullPointerException?
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32. Difference between String.isEmpty() and String.equals("") stackoverflow.comI created a "Color Chooser" with three textboxes where the user defines rgb values. |
33. String is not equal to string? stackoverflow.com |
34. Distinguishing Equivalent DataTypes stackoverflow.comIn Java, suppose I have a method that takes in two lists of integers, and returns an arrayList of integers from the first list, based upon the second list. |
35. equivalent of + in StringBuffer stackoverflow.comI have been using String to do the following. |
36. I dont understand this ("string" == "string") example stackoverflow.comI found this java code on a java tutorial page: |
37. Comparing two strings with "==": when will it work? stackoverflow.comSay you have three strings, s1 == s2 is false, but I read ... |
38. Check if a string is equal or substring of another stackoverflow.comI am trying to check if one string is the same as another or maybe if it's a part of it with the code below: |
39. Why is myString.equals("aString"); different from "aString".equals(myString);? stackoverflow.comI heard several times that in using
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40. How do you check if a string is not equal to an object or other string value in java? stackoverflow.comI have been trying to make a clock that the user can set. I wanted the user to be asked questions and they answer in words like yes or no. I ... |
41. How to prevent null check before equals stackoverflow.comI find stuff like this rather annoying and ugly in |
42. Whats the difference between using String.Equals(str1,str2) and str1 == str2? stackoverflow.comPossible Duplicate:Here is my code snippet : |
43. simple string.equals working incorrectly - Java stackoverflow.comBeen racking my brains with this for ages now and it's just stumped me. I have a simple string comparison: |
44. how do I code to check if a string does not equal another string? a value? bytes.comI understand how to use the equals, and know that there is an option to use '!' for unequal check, but in my case, I am testing against a value in ... |
45. equals(Object) of String coderanch.comHere is equals method in a class Foo, will it run faster if I use the hashcode of String at line return obj.equals(this.id) ? Public class Foo { private String id = ""; public boolean equals(Object obj) { if(obj == this) return true; if(obj == null || !(obj instanceof(Foo))) { return obj.equals(this.id); } } } [ March 07, 2005: Message edited ... |
46. why equals() not overridden in StringBuffer coderanch.comString is considered one of the 'Value' classes (not sure if that's my term or if I picked it up somewhere). This includes all the primitive wrapper classes and String. They share some characteristics. They are all immutible. They all override equals, hashCode, and toString. I think they also have some other common methods. To my knowledge no other class in ... |
47. Object.equals() vs String.equals() coderanch.comIn you downloaded the SDK from Sun, it came with a zip file of source code, src.zip. By all means unzip it and poke though it! In it you'll find that Object's equals method is defined as: public boolean equals(Object obj) { return (this == obj); } And String's equals method is defined as: public boolean equals(Object anObject) { if (this ... |
48. equals() in StringBuffer coderanch.com |
49. problerm with string equals coderanch.comWant code? Here you go: This segmet of code is an intent to encode a non ASCII String into an ASCII one: public class ByteSeparatorEncoder implements SimpleStringEncoder { private final String separator = "e"; public String decodeComplex( String simpleString ) { String[] byteRepresentation = simpleString.split( separator ); byte[] bytes = new byte[ byteRepresentation.length ]; for( int i = 0 ; i ... |
50. How to cut string into equal length peaces? coderanch.comMacTosh-- I'm unclear on the rules that apply to breaking up your input string, "~~this~~is~not~~easy~", where "~" stands for a space. So I'll proceed on the assumptions I've gleaned from answers to these questions: 1) Do the leading spaces (here, the two before "this") count in the length of the first word? 2) Does the first word end with the "s" ... |
51. String s = new String().equals( . . . . ) coderanch.comno. see code for equals method public boolean equals(Object anObject) { if (this == anObject) { return true; } if (anObject instanceof String) { String anotherString = (String)anObject; int n = count; if (n == anotherString.count) { char v1[] = value; char v2[] = anotherString.value; int i = offset; int j = anotherString.offset; while (n-- != 0) { if (v1[i++] != ... |
52. obj != null and !(obj.equals(null)) coderanch.comHi, Are obj != null and !obj.equals(null) the same ? Sometimes I have the impression that obj != null doesn't work. When I replace the code with !obj.equals(null) it works. I have the impression that if the object is instantiated in the class itself I can use !=. If I call method that returns an object I have to use obj.equals(null) ... |
53. String.equals() confusion coderanch.comHi, I'm having a problem with Vector.contains() I can remember a LONG time back, when I was just a greenhorn, Cindy Glass and I had a discussion about this. But now it's jumped up and bit my behind again! String one = "hello world"; String a = "hello"; String b = "world"; String two = a + " " + b; ... |
54. StringBuffer and equals() coderanch.comI think I've got the answer: posted February 24, 2001 10:00 AM -------------------------------------------------------------------------------- No, StringBuffer.equals() does not behave in the same way as String.equals(). In the javadoc for StringBuffer, you can see that it just inherits the default implementation (Object.equals()), and The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any reference ... |
55. aString;equals(bString) on null-object coderanch.comIt is true that the .equals method will throw a NPE when the object calling it is null; there is no real way around this (other than modifying the JVM somehow, as I inferr your intent from your post). However, it is possible (and even preferable) to write your own equals method outside the context of the object (i.e., make it ... |
56. Why are same strings not equal coderanch.comThe "==" operator compares two physical objects in memory to see if they occupy the same location in RAM -- i.e., to see if they are physically the same object. That won't be the case in your example; the two strings are being dynamically created by calling "replace", and each one will be a distinct object created just for that purpose. ... |
57. Null and NullPointers with "==" and ".equals()" coderanch.comHello ranchers: I am working on my understanding of Null initialization values and NullPointers. After declaring a new array object such as: String[] s = new String[10]; My understanding is that each element of the array is initialized at Null (because it is an array of String objects). Using the "==" comparison operator in the following code results in a "true" ... |
58. Mathematically Adding String Tokens to equal a sum coderanch.com |
59. difference between string equals. coderanch.comConsider the following: class TestString { public static void main(String[] args) { String s1 = "Apple"; String s2 = "Apple"; String s3 = new String("Apple"); String s4 = new String("Apple"); String s5 = s3; String s6 = "apple"; // compare bit patterns System.out.println(s1 == s2); // prints true System.out.println(s2 == s3); // prints false System.out.println(s4 == s3); // prints false System.out.println(s3 ... |
60. null equals null? coderanch.comI'm not sure what the intent here is, since the code provided will not compile. However, it looks like you are adding arrays into a List. As far as I know, .equals() for arrays is the same as ==; it compares if the physical objects are the same. public class ArrayTest{ public static void main(String argv[]){ String[] a1 = new String[]{null, ... |
61. string equals question coderanch.com |
62. Setting strings equal to each other coderanch.comTry this. public class StringBasics { public StringBasics() { } public static void main(String[] args) { new StringBasics().test(); } public void test(){ String s1 = new String("A");//not recommended use String s1 = "A" String s2 = new String("A");//not recommended use String s2 = "A" if(s1 == s2){ System.out.println("references are equal"); } if(s1.equals(s2)){ System.out.println("values are equal"); } s1 = s2; if(s1 == ... |
63. String == and equals() doubt coderanch.comclass Java_StudyNotes{ public static void main(String args[]){ String i="null"; String j=new String("null"); if (i==j)//i and j are object having same value(but different object ) so false System.out.println(i==j);//true else System.out.println(i!=j); //fasle if(i.equals(j))//i and j are objects having same value(no matter about identity)just sees equality System.out.println(i.equals(j));//true else System.out.println(!i.equals(j)); //fasle } } I thought it would output false true.But it gave true true.how? (i==j)---------I ... |
64. thou shalt never be equal to null? coderanch.comHello guys, Is it possible to check if something is equal to null? And receive a boolean answer? I'm pretty confused with this one, why I can have a value of null for an object and then right after can't I do boolean stuff on it? please check what I did: String userConfirmation = users.get(0).getConfirmationEmail(); ---> It is an object that ... |
65. Can something equal null? coderanch.comI may be thinking unclearly, it is a tad early, but if i need to check a string to see if it is null, how would i go about doing this? My first guess was string.isNull(), but alas there is no method like that. So I went to my friend Google and everything I saw there said string==null. I guess I ... |
66. Strings should be equal coderanch.comHi there, I'm going a bit mad trying to find out what is wrong with my code and I'd be grateful for any help. Basically, I have a little program that should test my French vocabulary. I have got a list of vocab in an sql database. I retrieve this vocab and turn it into an ArrayList of VocabElement objects These ... |
67. String "contains" equivalent - But should look for case-in-sensitive string coderanch.comHi all, There is a String array.I have look for a string which would contain in each string of that array. Say one of the strings in my array is str and my searchPattern string is searchString. Normal str.contains(searchString) would look for a case-sensitive pattern. Do I have any API that would not consider case. Using Patterns,it can be done as ... |
68. Equals VS indexOf coderanch.comHey, I don't think it will make a lot of of difference, you could also use the matches method, I prefer using this as it allows you to add a REGEX which is I think is more powerful. so... String url = "www.mysite.com/News"; url.matches("News"); // true url.matches("News$"); // true as long as news is at the end of the String Also ... |
69. StringBuffer & StringBuilder and equals() coderanch.com |
70. Why StringBuffer not override equals?? coderanch.com |
71. String comparison styles in equals coderanch.comHi, please see the code below. There are two styles to override equals, both are working. Need an expert opinion on small detail: as name is String in BParent, should I prefer use String.equals() instead of "==" in order to compare key String values within Object's overridden equals method? I am aware of the String Pool but don't really get my ... |
72. string.equals(""); coderanch.comHey guys. Im sorry if my question will be a little vague and "noob" but i have this problem ive been thinking for 2 hours and im tired,i hope maybe you can help again. I read a string from the keyboard and i use an if to determine what "word" is it. The if (xx.equals("exit"){ seems to be working fine,but the ... |
73. overriding equals() for StringBuilder coderanch.comHi, I wrote a piece of code which would add objects to a Set. I have overridden equals() and hashcode() ,so that no duplicate object gets added in the Set. Following is the object i am adding to the Set class MessageAndId { StringBuilder message; Integer id; public StringBuilder getMessage() { return message; } public void setMessage(StringBuilder message) { this.message = ... |
74. Why does cons remain equal to null? coderanch.comAny idea what's wrong here? : import java.util.*; import java.io.*; import java.lang.*; public class TestThree { public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print ("What's your name [DELETED]?"); String name = in.nextLine(); String firstName = in.next(); System.out.print("How old are you [DELETED]?"); int age = in.nextInt(); System.out.print("Hello, " + name + ", next year you will be " ... |
76. String == vs equals coderanch.com |
77. comparing two values with equalsIgnoreCase and equals with NULL as first value. coderanch.compublic class EqualIgnoreForNull { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub String stuff =null; String nonstuff = "see"; if (stuff.equalsIgnoreCase(nonstuff)) { System.out.println("EQUAL"); } else{ System.out.println("different"); } String stuff1 =null; String nonstuff1 = ""; if (stuff1.equals(nonstuff1)) { System.out.println("EQUAL1"); } else{ System.out.println("different1"); } } } The above code returns me NULL POINTER EXCEPTION ,since ... |
78. Trouble with String.equals( String) and == coderanch.comI was working through Just Java 2 when I stumbled on a problem. Frankly, it is giving me a headache... Anyone with some idea what is going on? Now: String A="end"; String B="end"; if( A ==B ) /* whatever */; if( A.equals( B ) /* whatever */; ought to work the same, only they do not. Here is cut-and-paste of the ... |
79. string comparison with "=" and ".equal" java-forums.orgpublic class Test { public static void main(String[] args) { String s1 = "hello"; String s2 = "hello"; //String s1 = new String("hello"); //String s2 = new String("hello"); if(s1 == s2) System.out.println("true"); } } and it printed true when i run the program. I thought s1 and s2 pointed at different memory address so it shouldn't have printed anything. on my ... |
80. Using string.equals forums.oracle.comBlindly making members static is generally the wrong approach to fixing the "cannot access non-static" error. Instead, create an instance of the appropriate class and use that instance to access the non-static members and methods you're using. As for your new error, a variable exists only within the nearest enclosing pair of curly braces. This is called the scope of a ... |
81. String Not Equals forums.oracle.com |
82. String equals, matches,, startsWith..endsWith... forums.oracle.comI got some problem and it is very weird for me ... For example: call method: toCompare("hello"); method: toCompare(String s) { String sa [] = //get all the filename from a file ...// for examle sa contain hello // loop if (sa.equals(s) ...){ // it actually return true // others matches ..startsWiths ..... } however ... when I call method: toCompare(s[0]); ... |
83. Strings - is there a !equals ? forums.oracle.comHey now, it's not as bad as what I did one day. I worked and worked and worked on some code but could not figure out why it wouldn't compile, finally I e-mail my teacher and when he replyed I was mashing many many buttons on my keyboard with my head. I had came straight out of Algebra II and evedently, ... |
84. String.equals() forums.oracle.com |
85. equals on a null string forums.oracle.comOn a side note, if you know for certain that pclass and pclass.name are both non-null, you can skip the initial null check, since x.equals(null) is always supposed to return false (and in particular, does so for String and all other API classes that I know of). Also note that if className is not supposed to be null--that is, if it's ... |
86. Question: equals() for objects, not necessarily strings forums.oracle.comBecause that's the way the equals() method for the Exp2 class (whatever it is; you didn't post it) was written (or not written). There's nothing magic about equals() methods. It's just a standard method with a standard signature, used to determine whether things are considered equal. Just because numeric values are used to initialize an object doesn't mean that the equals() ... |
87. using equals on substring forums.oracle.com |
88. multiple string comparison with equals forums.oracle.com |
89. String.equals() throws error. forums.oracle.com |
90. String: not equals instead of equals???!! forums.oracle.com |
91. String equals() vs == forums.oracle.comString a="Selva"; String b="Selva"; if(a==b) of course this above if loop will return true because value of two objects are string suppose if declare like this String a="String"; String b="Kumar" if(a==b) This loop return false because these two object value are different but you are saying == operator checking Object reference .these two object also belongs to same String class . ... |
92. Why use if null equals obj, instead of if obj equals null forums.oracle.com |
93. problem with string.equals forums.oracle.com |
94. Doubt in String Equals forums.oracle.com |
95. how to compare two strings to check they are equal forums.oracle.comBarman: "Sorry, we're out of beer, can I offer you something else" StringBuilder: "OK, I'll have a Scotch and soda." String: "Pint of beer for me, please." Barman: "Didn't you hear me, we're out of beer." String: "Pint of beer for me, please." Barman: "I said there's no beer!!" String: "Pint of beer for me, please." |
96. Strings not equal if passed in from the command line? forums.oracle.comBut if the contents of the string are the same are they therefore not the same object from the string pool?? Listen == will check if it is the same object. equals() will check the contents. When you compile that class how would the compiler know that the arg[0] passed in will be "alan"? it doesnt. arg[0] is a different String ... |
97. how to consider 2 string as equals if they are at least 80% alike? forums.oracle.com |
98. String compare using S .equals() and == forums.oracle.comWhen comparing strings, what is the different between using stringx.equals(stringy) and stringx == stringy? As others have said, equals compares contents (because String overrides it to do so) and == compares reference values--that is, whether both references point to the same object. To add to that a bit: You'll want to use equals. Even though == might work sometimes, it's not ... |
99. String equals implementation forums.oracle.comIt seems like atleast as of JDK1.5 implementation of java.lang.String class's equals method (public boolean equals(Object anObject)), in case the two strings are of same length, entire content is compared. Won't it be worthwhile to also ensure that - if their hash is available, the hash matches before comparing the entire string character arrays? Seems like that would offer a significant ... |
100. equals(name.charAt(n)) doesn't work? forums.oracle.com |