Tags down


3 out of 4 conditions in regex java

By : Aisis Chen
Date : August 01 2020, 07:00 PM
help you fix your problem I would suggest avoiding a potentially cryptic regular expression for this, and instead to provide something easier to read, understand and maintain (albeit more verbose).
Something like this (depending on what your conditions are, of course). For example, a length test should be mandatory:
code :
public boolean isValid(String password) {
    // password must contain 3 out of 4 of lowercase, uppercase, digits,
    // and others (punctuation, symbols, spaces, etc.).
    if (password == null) {
        return false;

    if (password.length() < 8) {
        return false;

    char[] chars = password.toCharArray();
    int lowers = 0;
    int uppers = 0;
    int digits = 0;
    int others = 0;
    for (Character c : chars) {
        if (Character.isLowerCase(c)) {
            lowers = 1;
        } else if (Character.isUpperCase(c)) {
            uppers = 1;
        } else if (Character.isDigit(c)) {
            digits = 1;
        } else {
            others = 1;
    // at least 3 out of 4 tests must pass:
    return (lowers + uppers + digits + others >= 3);

Share : facebook icon twitter icon

Java regex; conditions on groups

By : Nevena Nedeva
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Why are you using regular expressions to implement the logic of a card game? Seems pretty crazy... nevertheless it can be done!
code :
public class Test
    private static void test(String input, boolean expected)
        boolean result = input.matches("([123456789TJQKA])([dchs])\\1(?!\\2)[dchs]|([123456789TJQKA])\\3");
        if (result != expected)
            throw new RuntimeException("Failed!");

    public static void main(String[] args) throws Exception
        test("JJ", true);
        test("JsJd", true);
        test("11", true);
        test("2c2h", true);

        test("Js", false);
        test("JsJs", false);
        test("JsJ", false);
        test("JQ", false);
        test("1d1d", false);
        test("J", false);
        test("", false);
        test("3d3d", false);
        test("JsJdJ", false);
        test("JsJdJh", false);
        test("1A", false);

regex in java with conditions

By : aruneral01
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I have to write Regex in Java according to the following conditions:
code :
Pattern regex = Pattern.compile(
    "^             # Start of string                 \n" +
    "(?!.{65})     # Assert length not 65 or greater \n" +
    "(?:           # Match either                    \n" +
    " 0            #  0                              \n" +
    "|             # or                              \n" +
    " [1-9]\\d*    #  1-n, no leading zeroes         \n" +
    ")             # End of alternation              \n" +
    "(?:           # Match...                        \n" +
    " \\.          #  a dot                          \n" +
    " \\d{2}       #  followed by exactly 2 digits   \n" +
    ")?            # ...optionally                   \n" +
    "$             # End of string", 

Java regex confused with two conditions

By : namanM
Date : March 29 2020, 07:55 AM
will help you The first if condition should be true if it encounters this kind sequence e.g, 1,2,3...9 except 0 and it only allows 1 digit to pass. The second if is true if it has this sequence 12, 22, 33 .. 99 except for 01,02...09. It only allows two digits to be passed. But for some reason the first condition allows two or more digits and it doesn't go to the next condition. , Your regexes will not do what you need. See the following regexes:
code :
Pattern num1 = Pattern.compile("^[1-9]$");
Pattern num2 = Pattern.compile("^[1-9]\\d$");

How to merge two or more conditions in regex in Android Java?

By : sgrgl
Date : March 29 2020, 07:55 AM
I hope this helps . I am using an input filter and have used it to match the regex set in the xml. , You may try the below lookahead based regex.
code :

Java String Regex with multi-level conditions

By : Rajesh Parab
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I want to find a string within a string, here's my scenario: , You may use a regex like
code :
List<String> strs = Arrays.asList("ABC", "ASD*ABC", "JULY*ABC*RTEW", "ASDABC");
Pattern p = Pattern.compile("(?<=^|\\*)ABC(?=$|\\*)");
for (String str : strs) {
    Matcher m = p.matcher(str);
    System.out.println("\"" + str + "\" => " + m.find());
"ABC" => true
"ASD*ABC" => true
"JULY*ABC*RTEW" => true
"ASDABC" => false
Related Posts Related Posts :
  • Java EE 7 batch API (JSR-352): it's possible to stop a single step and not all the job?
  • Java multithread example - is object shared or not
  • Why String's replaceAll() method come at high performance cost at the first time and faster at the next time?
  • Lua script coverts empty array to object
  • Doesn't Access to external storage in API-29
  • How to add a button to the Android system navigation bar?
  • If inside for-each-loop to Stream
  • Shift array to the right by one slot
  • How to setup a Java development environment for Z3
  • how to make notify() works properly with wait()
  • IllegalFormatConversionException d != java.lang.Integer when trying to printf date?
  • Duplicate logic in backend and frontend with Domain Driven Design
  • How would I randomize an int[][]?
  • StringDate to Date coming in different Time in SimpleDateFormat in java
  • Get content uri from file path in android for video
  • function param issue in Scala 11, works in Scala 12 using resilience4j
  • Android unit testing : calling a method from fragment which uses context
  • How to remove E notation from Double value
  • Check if input is any of the values in an array
  • DateTimeParseException - could not be parsed at index 0
  • How to make a Java HTTP async request?
  • Make Javafx/Scenebuilder recognize tagged fields and methods when splitting the MainController into multiple files?
  • Why does this time fail to be parsed by DateTimeFormatter.ofPattern()?
  • Java - Merge objects of list given a condition
  • How to know if arraylist contains value in property of object?
  • Java modelling class if objects have same properties but they are fundamentally different
  • False Positive and False Negative
  • Java UnknownFormatConversionException = ','
  • Apache POI recording only 1 row in the spreadsheet
  • Getting Constructor from Java Class that would be called for argument types, not requiring exact argument & paramete
  • @JsonIgnore with Conditions
  • Does synchronizing on the static field that you are modifying make your code thread safe?
  • Compiler errors while trying to make a pop up
  • Trying to take two timestamps, subtract them, convert the difference to seconds and store in an int variable
  • How can I use Optionals instead of nested if statement?
  • How do I compare values in parallel arrays to eliminate duplicates?
  • make a method which returns the number of one digit numbers in an array
  • Does calling multiple times save() method of hibernate with same object insert new record in DB?
  • Single Number solving by Haspmap, return always be a "@"
  • What do you do about the JLabel classes? It says, "JLabel not a statement" for the error
  • Functional Interface call for a new Instance
  • When I tried to add ArrayList into ArrayList second ArrayList is repeating
  • How can I print the longest word from a user defined list?
  • enabling authentication in ignite
  • Providing OSGi Service Without Implementing Interface
  • Read manifest from JAR with gradle
  • Create one element Set the same way (if applicable) as create single element list
  • pass by reference an integer in java
  • how to generate the POI excel file in a specific location?
  • Issue trying to create a Bubble Sort using ArrayList<Integer>
  • How can I avoid typechecking in this situation
  • How to create a map<k,v> between first and last nested object using Java streams?
  • First time writing junit: Need suggestions
  • what is the best solution to split in chunk monthly given two dates startTime and EndTime in Java?
  • View Binding causes "The specified child already has a parent"
  • parse float in java with trailing junk
  • How to convert color from ColorPicker to String value in javaFX
  • Spring test integration not run how I deal with this error?
  • Java 8 Streams : Count the occurrence of elements(List<String> list1) from list of text data(List<String> li
  • What is the difference between static and protected in java?
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org