when using a array of strings in java, convert it to lowercase

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I got a one dimensional array of strings in java, in which i want to change all strings to lowercase, to afterwards compare it to the original array so i can have the program check whether there are no uppercase chars in my strings/array.

i've tried using x.toLowercase but that only works on single strings. Is there a way for me to convert the whole string to lowercase?

Kind regards, Brand

If you want a short example, you could do the following

String[] array = ...
String asString = Arrays.toString(array);
if(asString.equals(asString.toLowerCase())
   // no upper case characters.

when using a array of strings in java, convert it to lowercase, arrays ? Here's the complete java program for converting to uppercase Loop through the array , get each string and then convert it to lowercase using String. Java String toLowerCase () method has two variants – toLowerCase () and toLowerCase (Locale locale). Conversion of the characters to lower case is done by using the rules of default locale. Calling toLowerCase () function is same as calling toLowerCase (Locale.getDefault ()).

arraylist.stream().map(s -> s.toLowerCase()).collect(Collectors.toList()) 

may help you

How to convert uppercase strings into lowercase strings in Java by , toUpperCase is a string method, if you use it with a array it doesn't run but are you sure that you need the array inStock in uppercase? How to convert String to lowercase? To convert string to lower case, use the toLowerCase() method of the String class.

String  array[]= {"some values"};

String str= String.join(',',array);

String array_uppercase[]=str.toLowerCase().split(',');

All items in an array to uppercase?, 1. tolowercase() method This Java string method converts every character of the particular string into the lower case by using the rules of the� String.toLowerCase () It is predefined (built-in) method of String class in Java, it returns lowercase string.

Just two line

     String[] array = {"One", "Two"};
    for(int i=0;i<array.length;i++){
        if(!array[i].equals(array[i].toLowerCase()))
            System.out.println("It contains uppercase char");
        array[i] = array[i].toLowerCase();
    }
    for(int i=0;i<array.length;i++)
        System.out.println(array[i]);

OUTPUT:

It contains uppercase char
It contains uppercase char
one
two

Java String toLowercase() and toUpperCase() Methods, Write a program to accept a string array as input, convert all the elements into lowercase and sort the string array. Display the sorted array. Input� JAVA program to convert a string from uppercase to lowercase without using string method This JAVA program is to convert a string from uppercase to lowercase without using string method. For example, if the given string is HELLO(uppercase) then the string will be converted to hello(lowercase).

Write a java program to convert all the elements of the array into , C program to convert uppercase string to * lower case * written by: Chaitanya */ # include<stdio.h> #include<string.h> int main(){ /* This array can hold a string of� To convert or change uppercase string or character to lowercase string or character in Java Programming, use the ASCII values of character to convert any character from uppercase to lowercase as shown in the first program. And the second program uses the method toLowerCase () to convert string from uppercase to lowercase.

C Program to convert uppercase string to lowercase string, outer loop: for each lowercase letter for (char c = 'a'; c <= 'z'; c++) { // inner loop: Another algorithm would initialize 26 variables to zero, loop through the string a different variable to refer to the same array, and we can change the value of� With Java 8, the first example can be simplified to strings.replaceAll(String::toLowerCase); You could do a similar thing with the second, using Arrays.asList(stringsArray).replaceAll(String::toLowerCase); – Holger Dec 5 '19 at 9:27

Arrays and References | Think Java, Converts this string to a new character array. String, toLowerCase(). Converts all of the characters in this String to lower case using the rules of the default locale. Converting a lowercase char in a char array to an uppercase char (java) Ask Question How to turn a char to upper case in java without using String. Related.

String (Java SE 11 & JDK 11 ), The Java Tutorials have been written for JDK 8. contains a regular expression) and splits this string into an array of strings accordingly. String toUpperCase(), Returns a copy of this string converted to lowercase or uppercase. new string by concatenation of substrings you have removed from a string with the substring � .toLocaleString () -> transform the array into a string separated by commas..toLowerCase () -> convert that string to lower case..split (',') -> convert the string in lower case back to an array. Hope this helps you!

Comments
  • "Java" and not "JavaScript", right..? You might want to double-check your tags.
  • what you mean by "works on single strings" and "convert the whole string to lowercase".
  • Yep, there's a way to do this -- it's called a "loop".
  • You should loop over all strings in array, and convert each string into lowercase. I think, that there is no separate method for that.
  • shite, youre right about the tags, my bad, sorry for that.
  • This doesn't check if any of the original strings contained upper case characters.
  • @dku.rajkumar: yes, now it does, but Rdhao wants to compare the uppercase version with the original one, so simply replacing it is not useful.
  • @Michael I hope it does now :)
  • bit of a late comment, but this did help me a lot, thank you
  • It's not so advisable to use streams for that small set of static array. A simple loop is enough. (What you do is converting the array to list, then stream it, and then convert back to array. A ~3N operation while one simple loop reduces it to ~1N operation).
  • This will make it tricky to afterwards compare it to the original array. ;)