java编写的文本编辑器，实现功能：打开保存文件，修改文字字体颜色，查找替换字符串，换行，状态栏行列数显示，等功能。-text editor written in Java, and functions: open the saved file, modify the text font color, find-and-replace strings, newline, the number of rows and columns of the status bar displays, and