numerictextdocument.java

来自「一个基于J2ME技术的程序,使你可以远程控制装有服务端的PC.」· Java 代码 · 共 31 行

/*
 * Copyright (C) 2007 Filippo Di Vattimo - See LICENSE
 *
 */

package fildiv.jremcntl.server.utils.swing;

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

public class NumericTextDocument extends PlainDocument {
	
	public void insertString(int offs, String str, AttributeSet a)
			throws BadLocationException {
	
		if (str == null)
			return;
		
		String oldString = getText(0, getLength());
		String newString = oldString.substring(0, offs) + str
				+ oldString.substring(offs);
		try {
			Integer.parseInt(newString + "0");
			super.insertString(offs, str, a);
		} catch (NumberFormatException e) {
			// Ignored
		}
	}
}