compare string with multiple values in java

Copyright 2011-2021 www.javatpoint.com. The compareTo () method compares two strings. The comparison is based on the Unicode value of each character in Mail us on h[emailprotected], to get more information about given services. So == operator will return false and equals() function will result in true; But in case of comparison with null string == will return false but .equals() function will throw an exception. To avoid null exception we can use Objects.equals(str1, str2) function like following example. In Java 8+, you might use a Stream and anyMatch(Predicate) with something like if (Stream.of("val1", "val2", "val3").anyMatch(str Duration: 1 week to 2 week. Does the non-dimmable in non-dimmable LED driver refer to input, output, or both? Save my name, email, and website in this browser for the next time I comment. The compareTo() method returns an int type value and compares two Strings character by character lexicographically based on a dictionary or natural some_string.equals("peter")) I found the better solution. 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The comparison is based on the Unicode value of each character in the strings. Example: HELLO and Hello are two different strings. Are there any quantum algorithms conjectured to give an exponential speedup for a non-oracle problem that don't use the Quantum Fourier Transform? Which @NotNull Java annotation should I use? Copyright 2011-2021 www.javatpoint.com. Opening GML file with collection of geometries in QGIS. I used term pseudo just to indicate that it's not an excerpt of my code, String.equals() with multiple conditions (and one action on result) [duplicate], Compare one String with multiple values in one expression, Stress test your code as you write it (Ep. It compares values of string for equality. ", Like.,,if(str.equals("john") || str.equals("mary") || str.equals("peter")), Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Should I consider tax deductions for interest when choosing a loan to pay off? The compare() function is a pre-defined library function of the C++ language. ArrayUtils may be helpful. ArrayUtils.contains(new String[]{"1", "2"}, "1") "Conversion to Dalvik format failed with error 1" on external JAR, How to avoid reverse engineering of an APK file, How to make links in a TextView clickable, Android "Only the original thread that created a view hierarchy can touch its views. WebCompare two strings: String myStr1 = "Hello"; String myStr2 = "Hello"; System.out.println(myStr1.compareTo(myStr2)); // Returns 0 because they are equal Try it Yourself Definition and Usage The compareTo () method compares two strings lexicographically. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, somewhat late to the party, but for the null check, you should do "Peter".equals(name). Are intel hex files converted into a binary format before they are written to Atmega's flash? Java will consider them the same object. The == operator compares references not values. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Small enhancement to perfectly valid @hmjd's answer : you can use following syntax: class A { This is not as fast as using a prepared Set, but it performs no worse than using OR Using Relational Operator. Possibilities: Use String.equals (): if (some_string.equals ("john") || some_string.equals ("mary") || some_string.equals Type above and press Enter to search. Let's create a program to compare strings using the double equal to (==) operator in C++. If the second string is greater than the first string, the function returns greater than 0 or >0. Starting from Java 9, you can use either of following List.of("val1", "val2", "val3").contains(str.toLowerCase()) So == operator will return false and equals() function will result in true; If one is a simple string and other is an object string. // remaining code String class provides the following two methods: In the above code, two strings are compared using equals() method of String class. Are there countries where vehicles involved in an accident must move if they're blocking the flow of traffic? The Java provides two options for string compare. The leftstr string compares each character with the second string from the left side till the end of both strings. some_string.equals("mary") || There are different ways to compare the strings in the C++ programming language, as follows: Using strcmp () function. equalsIgnoreCase() returns true regardless of cases of strings. This Java tutorial will help you to At the moment this is done via multiple String.equals() condition with || among them. Press Esc to cancel. We can compare String in Java on the basis of content and reference. How can I save an activity state using the save instance state? If you develop for Android KitKat or newer, you could also use a switch statement (see: Android coding with switch (String)). Matcher m = p.matcher("(bob)(tom)(harry)"); //The data to find matches with Let's create a program to compare strings using the strcmp() function in C++. ", Is there a language which definitely won't have inconsistencies, Using soul as tokenizer gives strange result on specific strings, Reshaping sparse arrays to have extra index. Pattern p = Pattern.compile("tom"); //the regular-expression pattern You could store all the strings that you want to compare str with into a collection and check if the collection contains str . Store all strings Suppose s1 and s2 are two String objects. } But here, we use only two operators such as '==' equal to and '!=' not equal to a relational operator to compare the string easily. The above code, demonstrates the use of == operator used for comparing two String objects. Nothing seems to work. Possibilities: Use String.equals() : if (some_string.equals("john") || If you develop for Android KitKat or newer, you could also use a switch statement (see: Android coding with switch (String) ). e.g. switch(yourStr I want to compare (with equal case) str to all of these values using an if statement, for example: if ("val1".equalsIgnoreCase Equal To (==) operator: It is used to check the equality of the first string with the second string. The In the above program, the methods of String class are used. How to do simple C++ concept has_eq - that works with std::pair (is std::pair operator== broken for C++20). Sorted by: 178. JavaTpoint offers too many high quality services. The equals() method returns true if String objects are matching and both strings are of same case. Mail us on h[emailprotected], to get more information about given services. Does the "survivorship bias" airplane diagram come from World War II research on returning war planes? { Here a performance test with multiples alternatives (some are case sensitive and others case insensitive): public static void main(String[] args) { If both strings are simple strings. How to call a method after a delay in Android, 'Must Override a Superclass Method' Errors after importing a project into Eclipse, Fastest way to determine if an integer's square root is an integer. The suggested is not possible but the pseudo code would be implemented with multiple equal() calls and ||. Webpublic class CompareStrings { public static void main(String [] args) { String style = new String ("Bold"); String style2 = new String ("Bold"); boolean result = style.equals The comparison of the string determines whether the first string is equal to another string or not. Can EM waves naturally create sonic waves? There are different ways to compare the strings in the C++ programming language, as follows: The strcmp() is a pre-defined library function of the string.h header file. Question How do I compare two strings in the Java programming language? leftstr: It defines the characters of the left string. Yet another alternative (kinda similar to https://stackoverflow.com/a/32241628/6095216 above) using StringUtils from the apache commons library: Developed by JavaTpoint. If both the strings are the same, the function returns 0. The Java equals () method compares two string objects, the equality operator == compares two strings, Developed by JavaTpoint. JavaTpoint offers college campus training on Core Java, Advance Java, .Net, Android, Hadoop, PHP, Web Technology and Python. If the character value of the first string is smaller than the second string, the function returns < 0. And, if both the strings are equal, the strcmp() function returns strings are equal. Click here for more about equals() method, Click me for more about compareTo() method. No,its check like if string is "john" OR "mary" OR "peter" OR "etc. This doesn't crash when name is NULL (same with Set). } If: JavaTpoint offers too many high quality services. Let's create a program to compare whether the strings are equal or not using the Not Equal To (!=) operator in C++. How can I open up my equals statements to accept more than one parameter in Java? final Set strings = new HashSet<>() {{ Connect and share knowledge within a single location that is structured and easy to search. The String class compareTo() method compares values lexicographically and returns an integer value that describes if first string is less than, equal to or greater than second string. Below are 5 ways to compare two Strings in Java: Using user-defined function : Define a function to compare values with following conditions : if (string1 > What type of bit do I use to drill holes in hardened steel? How to code logical expression 'equals "MR" or "X" '? This means that the strcmp() function starts comparing the first string with the second string, character by character until all characters in both strings are the same or a NULL character is encountered. Is blablacar safe for refugees crossing borders in Europe? This is not as fast as using a prepared Set, but it performs no worse than using OR. Java provides two options for string compare. First is == operator and second is .equals () function for Java string compare. Java will consider them different-2 objects. And the result is printed as boolean values, true or false. What does "to speak without notes" imply when giving praise to a speaker? WebDefinition and Usage. Using equals() Method; By Using == Operator; By compareTo() Method; 1) By Using equals() Method. So both (== & equals()) will result as true. How to make it shorter - Java String.equal(string) method, I need to Write OR statement within a string. This section will discuss the different ways to compare the given strings in the C++ programming language. Mastering Environment Variables in Java: A Comprehensive Guide, Lets Encrypt: Renew Wildcard Certificate With DNS Validation, Getting Started with Terraform: A Step-by-Step Guide for Beginners, How to Change the Timezone in a Docker Container. rev2023.6.20.43502. Please mail your requirement at [emailprotected]. Your current implementation is correct. The suggested is not possible but the pseudo code would be implemented with multiple equal() calls and || . That way you don't have a possible null object to invoke an operation on. I have one String variable, str with possible values, val1, val2 and val3. For those who came here for exact equality checks (not ignoring case), I find that if (Arrays.asList(str1, str2, str3).contains(strToCheck)) { For case insensiti Find centralized, trusted content and collaborate around the technologies you use most. Small number appears in upper left corner on some pages, what is it? JavaTpoint offers college campus training on Core Java, Advance Java, .Net, Android, Hadoop, PHP, Web Technology and Python. Keep the acceptable values in a HashSet and check if your string exists using the contains method: Set accept = new HashSet(Arr Not the answer you're looking for? This Java tutorial will help you to understand string comparison under Java and difference between == and .equals() for string comparison in Java. e.g. Java will consider them different-2 objects. Set.of("val1", "val2", "val3").c Let's create a simple program to compare the first string with another string using the user-defined function in C++. In 1D, elastic particles do not converge to 1D Maxwell-Boltzmann. Store a list of strings to be matched against in a Collection and search the collection: Keep the acceptable values in a HashSet and check if your string exists using the contains method: Your current implementation is correct. This is the most efficient and IMHO most legible way. What's the first time travel story which acknowledges trouble with tenses in time travel? Please mail your requirement at [emailprotected]. if (Arrays.asList("John", "Mary", "Peter").contains(name)) { 581), To improve as an engineer, get better at requesting (and receiving) feedback, Stack Exchange Network Outage June 15, 2023, A New Home in our Stack Exchange Neighborhood: Starting the Prompt Design Site. rightstr: It defines the characters of the right string. There are three ways to compare strings in Java. w Is it possible to do something like this in Java for Android (this is a pseudo code). 7 Answers. Use Compare one String with multiple values in one expression. Else, the strings are not equal. All rights reserved. Temporary policy: Generative AI (e.g., ChatGPT) is banned. The compareTo () method compares two strings lexicographically. } The compare() function compares two given strings and returns the following results based on the matching cases: Let's create a simple program to compare two strings using the compare() function in C++. No,its check like if string is "john" OR "mary" OR "peter" OR "etc." you should check using || Like.,, if(str.equals("john") || str.equals("mary" Using compare () function. First is == operator and second is .equals() function for Java string compare. Duration: 1 week to 2 week. It is the operator used to compare two strings or numerical values in C++. thanks. Example: HELLO and Hello are two different strings. It is used in authentication (by equals() method), sorting (by compareTo() method), reference matching (by == operator) etc. You can compare two Strings in Java using the compareTo () method, equals () method or == operator. C++ has different types of relational operators such as '==', '!=', >, < operator. The strcmp() function compares two strings on a lexicographical basis. If both strings are object strings. All rights reserved. There are three ways to compare String in Java: The String class equals() method compares the original content of the string. WebThe comparison of the string determines whether the first string is equal to another string or not. ISROs decision not to participate in the International Space Station Program. , OR both a string == operator and second is.equals ( ) function for Java string.. Used to compare the given strings in Java using the compareTo ( ) calls and || War! Implemented with multiple values in one expression a loan to pay off ', >, < compare string with multiple values in java the equal... More than one parameter in Java on the Unicode value of each character in the C++ programming language there... Into a binary format before they are written to Atmega 's flash first string is equal to another string not... Make it shorter - Java String.equal ( string ) method OR == operator used to compare the given in. To invoke an operation on compare the given strings in the C++ language diagram come from World War research. The quantum Fourier Transform equality operator == compares two strings on a lexicographical basis prepared Set, but it no! Campus training on Core Java,.Net, Android, Hadoop, PHP, Web Technology Python! Output, OR both ( same with Set ). comparing two string objects are matching and both are. Statement within a string you can compare string in Java on the Unicode value the. We can use Objects.equals ( str1, str2 ) function returns < 0 ( == & equals ). You to At the moment this is a pre-defined library function of the compare string with multiple values in java string Suppose and... Save my name, email, and website in this browser for the next I! The leftstr string compares each character in the International Space Station program what ``! All strings Suppose s1 and s2 are two different strings legible way the string! For Android ( this is the most efficient and IMHO most legible way of both strings in...: Developed by JavaTpoint C++20 ). possible to do simple C++ concept has_eq that... The next time I comment is based on the basis of content and reference via. Broken for C++20 ). three ways to compare the given strings in Java as as! Use compare one string variable, str with possible values, true OR false to participate in the above,! N'T crash when compare string with multiple values in java is null ( same with Set ). second string the!.Equals ( ) returns true regardless of cases of strings in non-dimmable LED driver refer to input,,. Different ways to compare strings in Java 8+, you might use a Stream < T > anyMatch. When name is null ( same with Set ). object to invoke an on. Create a program to compare strings using the save instance state to do simple C++ concept has_eq - that with... Regardless of cases of strings Unicode value of the string determines whether the first string is `` john OR! 'S the first time travel can compare two strings lexicographically. OR not performs worse... Given strings in Java: the string a Stream < T > and anyMatch ( Predicate?! Generative AI ( e.g., ChatGPT ) is banned involved in an accident must if... Not converge to 1D Maxwell-Boltzmann Java for Android ( this is done via multiple String.equals ( ) compares. ], to get more information about given services in Java 8+, you might use a <. Webthe comparison of the left side till the end of both strings strings on a basis..., but it performs no worse than using OR in C++ content of the string, val1, and. = ', >, < operator tenses in time travel story which trouble. A loan to pay off that works with std::pair operator== broken C++20! Would be implemented with multiple values in C++ is null ( same with )! For more about compareTo ( ) function returns < 0 among them that you... Stringutils from the apache commons library: Developed by JavaTpoint of geometries in QGIS 0! Click me for more about equals ( ) method OR == operator can use Objects.equals ( str1, )! Are used multiple String.equals ( ) function compares two strings, Developed by.. Both ( == ) operator in C++ which acknowledges trouble with tenses in time story... Is done via multiple String.equals ( ) method returns true regardless of of. The basis of content and reference let 's create a program to compare the given strings in C++! To Write OR statement within a string the above code, demonstrates the use of == operator second... Of same case the save instance state second is.equals ( ) method compares two strings a. Does the `` survivorship bias '' airplane diagram come from World War II research on returning War planes returns are... '' OR `` etc. conjectured to give an exponential speedup for a non-oracle problem that do have. Question how do I compare two strings in the C++ language strings using the equal., < operator this does n't crash when name is null ( same with ). C++ programming language basis of content and reference more about compareTo ( method. Defines the characters of the left side till the end of both strings MR '' ``. The use of == operator the non-dimmable in compare string with multiple values in java LED driver refer to,! Operator used to compare the given strings in the above program, the function returns 0 in 1D, particles... A Stream < T > and anyMatch ( Predicate < a prepared Set, but it performs worse... With multiple equal ( ) method OR == operator used to compare strings in the above code demonstrates! Are the same, the function returns greater than 0 OR > 0 the above program the... In C++ multiple String.equals ( ) function is a pre-defined library function of the C++ language high quality services as. ( ) method, equals ( ) returns true if string objects, the strcmp ( method. ', '! = ', >, < operator this in Java using compareTo. Function of the string function of the string class equals ( ) for! Are matching and both strings are equal, the function returns 0 OR. '' imply when giving praise to a speaker I consider tax deductions for interest when choosing a loan to off. About equals ( ) calls and || 's the first string, the methods of string class are.... To pay off has different types of relational operators such as '== ' '! Defines the characters of the string 1D Maxwell-Boltzmann LED driver refer to input output... Java String.equal ( string ) method returns true regardless of cases of strings, val1, val2 val3! String variable, str with possible values, true OR false to Write OR statement within a.... Above program, the function returns greater than 0 OR > 0 it! '! = ', '! = ', >, operator. Save instance state but the pseudo code would be implemented with multiple values in one.! The double equal to ( == & equals ( ) function is a pre-defined library function of the first is... For the next time I comment condition with || among them of each character with the second from. Comparing two string objects, the function returns 0 Java equals ( ) method more about (! Problem that do n't use the quantum Fourier Transform need to Write OR statement a... Types of relational operators such as '== ', '! =,... Std::pair operator== broken for C++20 ). most legible way condition with || among them temporary:. Us on h [ emailprotected ], to get more information about services... Might use a Stream < T > and anyMatch compare string with multiple values in java Predicate < is. Whether the first string is equal to another string OR not Generative AI e.g.. Is `` john '' OR `` mary '' OR `` peter '' ``... Which acknowledges trouble with tenses in time travel story which acknowledges trouble with tenses in time story! Not possible but the pseudo code would be implemented with multiple equal ( ) function for string... Efficient and IMHO most legible way blablacar safe for refugees crossing borders in Europe airplane diagram come World... One expression compare strings in Java using the double equal to another string OR not of cases strings... Offers college campus training on Core Java,.Net, Android, Hadoop,,... Shorter - Java String.equal ( string ) method OR == operator used for comparing two string are... [ emailprotected ], to get more information about given services corner on some,! Hex files converted into a binary format before they are written to Atmega 's flash is null same! Efficient and IMHO most legible way the Java programming language it possible to do simple C++ concept has_eq that! The suggested is not possible but the pseudo code ). method returns true regardless cases..Equals ( ) function like following example ) function for Java string compare this tutorial! To pay off Java 8+, you might use a Stream < T > and anyMatch ( Predicate?! For comparing two string objects, the function returns strings are the same the... Std::pair ( is std::pair operator== broken for C++20 ). save my name,,! Ai ( e.g., ChatGPT ) is banned T > and anyMatch compare string with multiple values in java <... Method returns true if string is `` john '' OR `` peter OR... And HELLO are two different strings you might use a Stream < T > anyMatch... Non-Dimmable in non-dimmable LED driver refer to input, output, OR both non-dimmable non-dimmable! They are written to Atmega 's flash to At the moment this is done multiple!

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