Upper to lower

[thecabeza]

Hey guys, I need help...

I need to write a program that converts uppercase to lowercase letters in java, in netbeans 5.0, and i have no idea how to do it.

Thank you, i would apreciate your help.

[peter_budo]

In JAVA API when you look up String documentation there is method
toLowerCase() =>> Converts all of the characters in this String to lower case using the rules of the default locale.

String lowerCaseString = mixedCaseString.toLowerCase();

for other info check documentation http://java.sun.com/javase/6/docs/api/java/lang/String.html

[peter_budo]

I don't know why do this but on personal request here is code

public class LowerCaseChange
{
	public static void main(String[] args)
	{
		String mixed = "ThiS PrograM Is DrivinG me CrAzY, I am New at programming!!";
		System.out.println(mixed);
		
		String lowerCaseSet = mixed.toLowerCase();
		System.out.println(lowerCaseSet);
	}
}

It is so simple...

[thecabeza]

I don't know why do this but on personal request here is code

public class LowerCaseChange
{
    public static void main(String[] args)
    {
        String mixed = "ThiS PrograM Is DrivinG me CrAzY, I am New at programming!!";
        System.out.println(mixed);
 
        String lowerCaseSet = mixed.toLowerCase();
        System.out.println(lowerCaseSet);
    }
}

Hey Pet, look like you are good at this. thank you. But what i have to do it this...

write a program that converts an uppercase letter to a lowercase letter. The character is typed in the source code as a literal value. And i have to use this...

int (offset) = (int) 'a' - (int) 'A' ;
char lowercase = (char)((int)uppercase + offset);

I have this already..

import javax.swing.JOptionPane;

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

String uppercaseString = JOptionPane.showInputDialog(null,
"Enter an Uppercase letter to convert: ", JOptionPane.QUESTION_MESSAGE);

int offset = (int)'a' - (int)'A';
char lowercase = (char)((int)uppercase + offset);

[masijade]

Then what you are getting from your JOptionPane is a String. You need to convert this String to a char. Here is an example (I am assuming you only have to deal with one letter):

char letter = uppercaseString.toCharArray()[0];

I assume you know what to do with the offset once you have turned the String into a char.

Also, this information is easily found in the String API doc.