How to get upper case instead of lower case in a string without method toUppercase. P.S below

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How to get upper case instead of lower case in a string without method toUppercase, but the other symbols should not change in the string

   package com.telukhin.hw6;

public class Task1 {
    public static void main(String[] args) {

    } private static String lowerCase(String s) {
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            if(ch >= 'a' && ch < 'z') {
                ch = ch - '32';
            }


        }
    }
}

You can do it as follows:

public class Task1 {
    public static void main(String[] args) {
        System.out.println(lowerCase("HELLO"));
    }

    private static String lowerCase(String s) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            if (ch >= 65 && ch <= 90) 
                sb.append((char)(ch+32));           
            else
                sb.append((char)ch);
        }
        return sb.toString();
    }
}

Output:

hello

Please check https://www.cs.cmu.edu/~pattis/15-1XX/common/handouts/ascii.html for reference.

UPDATE: Adding a method to convert a String to upper case as well

public class Task1 {
    public static void main(String[] args) {
        System.out.println(lowerCase("HELLO"));
        System.out.println(upperCase("hello"));
    }

    private static String lowerCase(String s) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            if (ch >= 65 && ch <= 90) //ASCII value of 'A'is 65 and that of 'Z' is 90
                sb.append((char)(ch+32));           
            else
                sb.append((char)ch);
        }
        return sb.toString();
    }
    private static String upperCase(String s) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            if (ch >= 97 && ch <= 122) //ASCII value of 'a'is 97 and that of 'z' is 122
                sb.append((char)(ch-32));           
            else
                sb.append((char)ch);
        }
        return sb.toString();
    }
}

Output:

hello
HELLO

Overview of SQL LOWER and SQL UPPER functions, For example, you get the following entries in your SQL table. Example 1: Use UPPER function with all lower case characters in a single word use a string with Upper function, and it converts all letters in the string to uppercase. How to recover SQL Server data from accidental updates without backups´┐Ż This method converts all the characters of a string to upper case using the default locale. Internally it is same as calling the toUpperCase(Locale.getDefault()) method.


java for complete beginners - uppercase, lowercase, How to convert string to upper and lower case in java. or lower case is fairly straightforward: just use the inbuilt methods toUpperCase Here, Java will just get on with converting the string, without needing to assign the result to a new variable. If you want to convert to lowercase, just use the toLowerCase method instead. Definition and Usage. The toUpperCase() method converts a string to uppercase letters. Note: The toUpperCase() method does not change the original string. Tip: Use the toLowerCase() method to convert a string to lowercase letters.


Assuming this isn't homework, which the limit of not using toUppercase sort of implies, you could do this:

public class Main
{
    public static void main(String[] argv)
    {
        final String upper = toUpperCase("HELLO1234@world.CoM");

        System.out.println(upper);
    }

    private static String toUpperCase(final String s)
    {
        final StringBuilder builder = new StringBuilder();

        for(final char c : s.toCharArray())
        {
            final char upper = Character.toUpperCase(c);

            builder.append(upper);
        }

        return builder.toString();
    }
}

This will handle non-ascii characters. Alternatively, you can still use the 65 and 90 bit in place of Character.toUpperCase

How do we convert a lower case to upper case letter in Java?, In case you want whole string to be converted in uppercase then use PS: Instead of posting these questions on Quora, make a google search, you will learn better How can you write a method to return 4 if 5 is input and vice versa? How do you convert a string to uppercase or lowercase in C++ without using libraries? The String.ToUpper() and String.ToLower() methods in C# and .NET convert a string into an uppercase and a lowercase string respectively. These methods are easy to use. The following code sample converts to string into uppercase and lowercase strings.


One more example. This converts the string to an array of characters for working with, and then creates a new string with the result. It seems more convenient than using charAt, StringBuilder, etc.

Like many of the other answers, valid only for the 26 letters that also occur in ASCII.

class Foo {

    public static String upcase(String str) {
        char[] arr = str.toCharArray();
        for (int k=0; k<arr.length; k++) {
            if (arr[k] >= 'a' && arr[k] <= 'z') {
                arr[k] -= ('a'-'A');
            }
        }
        return new String(arr);
    }

    public static void main(String... args) {
        String test = "a9z A?Z";
        System.out.println(test + " ==> " + upcase(test));
    }
}

String case, Use the default encoding of a string literal or plain ASCII if there is no string literal in your Manipulation: reverse, lower- and uppercase´┐Ż C# program to count upper and lower case characters in a given string This helps to convert the string into a lowercase string. We can use this same method if we


Oracle UPPER, LOWER, and INITCAP Function Guide, FAQ , Learn all about the Oracle UPPER, LOWER, and INITCAP functions in this article, you'll need to enclose it in single quotes (as you'll see in the examples below). You'll get them for Oracle, SQL Server, MySQL, and PostgreSQL. input_string (mandatory): The string value to convert into upper case. The first variant converts all of the characters in this String to upper case using the rules of the given Locale. This is equivalent to calling toUpperCase (Locale.getDefault ()). The second variant takes locale as an argument to be used while converting into upper case.


Change UpperCase to LowerCase and Lowercase to Uppercase Of , Java provide us the inbuilt method to change the case of the string such as Before we go ahead we need to know about the UNICODE . from uppercase to lowercase unicode integer representation of character . Demo : change case of all the characters in the string in java program code. Please find the code below :. An array of char type s[100] is declared which will store the entered string by the user. Then, for loop is used to convert the string into upper case string and if block is used to check that if characters are in lower case then, convert them in upper case by subtracting 32 from their ASCII value.


Python: Convert a string to all uppercase if it contains at least 2 , Write a Python function to convert a given string to all uppercase if it Have another way to solve this solution? instead of doing a = 8; b = 5 >>> a, b = 8, 5 >>> print(f'a is {a}; b is {b}') a is 8; This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Below is the step by step descriptive logic to convert string to uppercase. Input string from user, store it in some variable say str. Run a loop from 0 till end of string. Inside loop check if current string is lowercase then convert it to uppercase str [i] = str [i] - 32.