IntFilter.java

package FormatTest;

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;

/**
 * Filtru ce nu da voie sa introduci cifre cu minus
 * @author Dan
 *
 */
public class IntFilter extends DocumentFilter
{
	public void insertString(FilterBypass fb, int offset, String string, AttributeSet attr) throws BadLocationException
	{
		StringBuilder builder = new StringBuilder(string);
		for(int i = builder.length()-1; i>=0 ; i--)
		{
			int cp = builder.codePointAt(i);
			if(!Character.isDigit(cp) && cp != '-')
			{
				builder.deleteCharAt(i);
				if(Character.isSupplementaryCodePoint(cp))
				{
					i--;
					builder.deleteCharAt(i);
				}
			}
		}
		super.insertString(fb, offset,builder.toString(), attr);
	}
	
	public void replace(FilterBypass fb, int offset, int length, String string, AttributeSet attrs) throws BadLocationException
	{
		if (string != null)
		{
			StringBuilder builder = new StringBuilder(string);
			for(int i = builder.length() -1 ; i>=0 ; i--)
			{
				int cp = builder.codePointAt(i);
				if(!Character.isDigit(cp) && cp!= '-')
				{
					builder.deleteCharAt(i);
					if(Character.isSupplementaryCodePoint(cp))
					{
						i--;
						builder.deleteCharAt(i);
					}
				}
			}
			string = builder.toString();
		}
		super.replace(fb, offset, length, string, attrs);
	}
}