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Java - map key lookup ignoring case


Java - map key lookup ignoring case

By : emott
Date : November 27 2020, 04:01 AM
I wish this help you I'm writing a script that creates a map from user nicknames to user IDs: , You could do something similar:
code :
public class ContainsKeyIgnoreCase {

    public static void main(String[] args) {

        Map<String, Integer> userInfo = new HashMap<String, Integer>();
        userInfo.put("nickNamE", 1);

        String nickName = "NiCKname";

        System.out.println(containsKeyIgnoreCase(userInfo, nickName));
    }

    public static boolean containsKeyIgnoreCase(Map<String, Integer> map, String lookupKey) {
        return map.keySet()
                  .stream()
                  .map(key -> key.equalsIgnoreCase(lookupKey))
                  .reduce(false, Boolean::logicalOr);
    }   
}


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In Java, how do I check if a string contains a substring (ignoring case)?

In Java, how do I check if a string contains a substring (ignoring case)?


By : localghost
Date : March 29 2020, 07:55 AM
I hope this helps you . I have two Strings, str1 and str2. How do I check if str2 is contained within str1, ignoring case?
code :
str1.toLowerCase().contains(str2.toLowerCase())
Are there any way to apply regexp in java ignoring letter case?

Are there any way to apply regexp in java ignoring letter case?


By : tuzkee
Date : March 29 2020, 07:55 AM
this will help Simple example: we have string "Some sample string Of Text". And I want to filter out all stop words (i.e. "some" and "of") but I don't want to change letter case of other words which should be retained. , You can use the inline case-insensitive modifier:
code :
str.replaceAll ("(?i)a|the|of|some|any", "");
Counting occurences of substring ignoring case in JAVA

Counting occurences of substring ignoring case in JAVA


By : avm
Date : March 29 2020, 07:55 AM
This might help you You are picking up substrings that were mixed-case before - say, Div. This is not a good reason to count "div"s, though, because you would pick up parts of longer words (say, Division or Divorce).
If you want a better count, you could use a simple regex to do the counting:
code :
"[</]div[ />]"
Pattern countRx = Pattern.compile("[</]div[ />]", Pattern.CASE_INSENSITIVE);
Matcher m = countRx.matcher(sHtml);
int count = 0;
while (m.find()) {
    count++;
}
System.out.println(count);
Ignoring upper case and lower case in Java

Ignoring upper case and lower case in Java


By : Gunter
Date : March 29 2020, 07:55 AM
hope this fix your issue You have to use the String method .toLowerCase() or .toUpperCase() on both the input and the string you are trying to match it with.
Example:
code :
public static void findPatient() {
    System.out.print("Enter part of the patient name: ");
    String name = sc.nextLine();

    System.out.print(myPatientList.showPatients(name));
}

//the other class
ArrayList<String> patientList;

public void showPatients(String name) {
    boolean match = false;

    for(matchingname : patientList) {
        if (matchingname.toLowerCase.contains(name.toLowerCase())) {
            match = true;
        }
    }
}
Replace String ignoring case in Java

Replace String ignoring case in Java


By : user3861743
Date : March 29 2020, 07:55 AM
this will help , String.replace() doesn't support regex. You need String.replaceAll().
code :
DeleteLine.replaceAll("(?i)" + Pattern.quote(Checkout), "");
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