Description: 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. 6. Right-click, pop-up graphics attributes the current panel. Can proceed as follows : (a) Click "Color Settings" icon left, color graphics can be amended (foreground color); (2) Click "Color Settings" icon right, amend the drawing board in color (the background color); (3) "Size Settings" graphics can be amended to make the lines
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