public class Main {
   
    /**
     * Converts all lower case characters to upper case
     */
    public void stringToUpperCase() {
       
        String str = "All Lower Case Characters In This String Will Be Converted To Upper Case";
       
        str = str.toUpperCase();
       
        System.out.println(str);
    }
   
    /**
     * Starts the program
     *
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        new Main().stringToUpperCase();
    }
}


Output