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  1. www.w3schools.com › java › ref_string_touppercaseJava String toUpperCase() Method - W3Schools

    Convert a string to upper case and lower case letters: String txt = "Hello World"; System.out.println(txt.toUpperCase()); System.out.println(txt.toLowerCase()); Try it Yourself »

    • toLowerCase

      W3Schools offers free online tutorials, references and...

  2. www.geeksforgeeks.org › java-string-touppercase-method-with-examplesJava String toUpperCase() Method - GeeksforGeeks

    25 de dic. de 2023 · Last Updated : 25 Dec, 2023. The Java String toUpperCase () method of the String class has converted all characters of the string into an uppercase letter. There is two variant of toUpperCase () method.

  3. stackoverflow.com › questions › 2375649Converting to upper and lower case in Java - Stack Overflow

    3 de mar. de 2010 · Try this on for size: // Empty strings should be returned as-is. if (inputVal.length() == 0) return ""; // Strings with only one character uppercased. if (inputVal.length() == 1) return inputVal.toUpperCase(); // Otherwise uppercase first letter, lowercase the rest. return inputVal.substring(0,1).toUpperCase() + inputVal.substring(1 ...

  4. www.baeldung.com › string › to-upper-caseJava.String.toUpperCase() | Baeldung

    8 de ene. de 2024 · Last updated: January 8, 2024. Written by: baeldung. Reviewed by: Grzegorz Piwowarek. Java String. This article is part of a series: The method toUpperCase () converts all characters of a String to upper case. If no Locale is passed to the method, then it will use the default Locale.

  5. www.guru99.com › es › java-string-tolowercase-methodsMétodos Java String toLowercase() y toUpperCase() - Guru99

    26 de dic. de 2023 · cadena java en una letra mayúscula. Ejemplo 2: public class Guru99 { public static void main(String args[]) { String S1 = new String("lowercase converted to uppercase"); //Convert to UpperCase System.out.println(S1.toUpperCase()); } } Rendimiento esperado: LOWERCASE CONVERTED TO UPPERCASE

  6. www.javatpoint.com › java-string-touppercaseJava String toUpperCase() method - javatpoint

    The java string toUpperCase () method returns the string in uppercase letter. In other words, it converts all characters of the string into upper case letter. The toUpperCase () method works same as toUpperCase (Locale.getDefault ()) method. It internally uses the default locale.

  7. www.programiz.com › java-programming › libraryJava String toUpperCase() - Programiz

    returns a string with all lower case letters converted to upper case Example: Java toUpperCase() class Main { public static void main(String[] args) { String str1 = "Learn Java"; String str2 = "Java123"; // convert to upper case letters System.out.println(str1.toUpperCase()); // "LEARN JAVA" System.out.println(str2.toUpperCase()); // "JAVA123" } }