日期:2014-05-20 浏览次数:20770 次
import javax.swing.text.AttributeSet; import javax.swing.text.BadLocationException; import javax.swing.text.PlainDocument; public class NumOnly extends PlainDocument{ public void insertString(int offs,String str,AttributeSet a) throws BadLocationException{ for(int i=0;i<str.length();i++){ if(str.charAt(i)<'0'||str.charAt(i)>'9'){ return; } } super.insertString(offs,str,a); } }