Filterning Input Length

[ideru]

I'm using the JFormattedTextField.

I set it document filter to my specific size, it works with normal alpha numeric character.

My problem right now is when the input is a combination of Japanese characters and alphabet.

My textfield needs only to accept 26 bytes,so
right now Im using the getBytes() functionality to control the bytes input.

Using the "InputMethodTextChangeEvent" , if the condition is satisfied, then I would consume the event and commit the text

  
private void jText_InputMethodTextChanged(java.awt.event.InputMethodEvent evt)													   
	{														   
		 
		if( this.jText_01.getText().getBytes().length == 26 )
		{
			System.out.println("Consuming Event");	  
			evt.consume();
			try
			{
				System.out.println("Committing ... ");
				this.jText_01.commitEdit();
			}
			catch(Exception e)
			{
				System.out.println(e.getCause().toString());
			}
		}
	}

what i want to do, is that when I commitEdit(), I want to flushed the Input Stream to get rid of unnecessary string. Is there a way to do this?

[ProgramThis]

if jText_01 is a JFormattedTextField object then it has a setText() method that it inherits from JTextComponent. Have you tried to call this method and pass it ""?

[dlorde]

I don't really understand what your problem is - if you want to limit input to 26 bytes, use a DocumentFilter. Where does InputStream come into it?

Are you quite sure you want to measure this in bytes? Java uses Unicode characters, which are multi-byte...

No matter how far down the wrong road you have gone, turn back now...
Turkish proverb

[ideru]

as I have mentioned the DocumentFilter works well if the character encoding is ROMAN Letters.

the problem is when the input FULL_WIDTH, JAPANESE CHARACTERS.

example you have the same string below:

String strNormal = new String("12345");
String strJapn = new String("１２３４５");

if you get the string length for both string, it will both return size = 5, but if you get the byte length

strNormal = 5
strJapn = 10

so since, input is limited to 26 , for strNormal you can still input 11 more characters
but for strJapn , if you are going to continue inputing Japanese charatecters you can only input 8 more japanese characters

and then there is also a combination of both alphanumeric and japanese characters .

somehow we were able to control the input, using the keypressed, keyrelease, and inputMethodTextChange events..