基于java实现的一个函数绘制程序，输入要绘制的函数如x+1，x^3-1,lnx等，点击相应的按钮即可得到函数图像。-Java-based drawing program to achieve a function, to be plotted as a function of input x+ 1, x ^ 3-1, lnx like, click on the appropriate button to get the function of the image.