一个java记事本程序 包括新建，打开，保存，另寸为，设置字体，设置字号，设置字体颜色，设置背景颜色，设置行间距，设置段间距-a notebook include new, open, preservation, as another inch, installed fonts, set up number, set font color, background color, set up, set up trip spacing, paragraph spacing set