In this section, we will learn what the Character toUpperCase() method is and how to use it in Java.

What is Java Character toUpperCase() Method?

The `toUpperCase()` method is used to return the uppercased letter of the character that we set as the argument of the method.

Java toUpperCase() Method Syntax:

static char toUpperCase(char ch)

toUpperCase() Method Parameters:

The method takes one argument, and that is the character we want to uppercase.

toUpperCase() Method Return Value:

The return value of this method is the uppercase version of the character that we set as its argument.

Note: if the character is already an uppercase one, this method will return that with no changes.

Also, the type of the character is “char”.

Example: using Character toUpperCase() method

public class Simple {

    public static void main(String args[]) {

       String  s = "You Never Know What Will Happen Tomorrow!";
       char[] chars = new char[s.length()];
       int i = 0;
       for (char c: s.toCharArray()){
           chars[i] = Character.toUpperCase(c);
           i++;
       }
       String res = String.valueOf(chars);
        System.out.println(res);
    }
}

Output:

YOU NEVER KNOW WHAT WILL HAPPEN TOMORROW!