Introduction - If you have any usage issues, please Google them yourself
environment configuration : System with jre operating environment. Use : 1. Double-click drawer.jar documents, applications can run. 2. Click "Oval" button and drag the mouse, the drawing board Circle. 3. Click the "Triangle" button and drag the mouse, the drawing-board painting equilateral triangle. 4. Click "Clear" button, the screen drawing board. 5. Click "Exitl" button and exit procedures.