javaバージョン timing       setup paint time always interval everyterm     mouseEnter mouseExit mousePressed mouseReleased mouseMoved mouseDragged keyPressed keyReleased base class property       monitorHeight monitorWidth mouse mouseX mouseY nowTime preMouse preMouseX preMouseY preTime     base class method       clearAll clearRect crossing direction distance drawArc drawBezierCurve drawBezierPath drawImage drawLine drawOval drawPolygon drawPolyline drawRect drawRoundRect drawString fillArc fillBezierPath fillOval fillPolygon fillRect fillRoundRect getBackColor getColor getFontName getFontSize getForeColor getPenSize random setBackColor setColor setFontName setFontSize setForeColor setPenSize   point class property       MASS preX preY preZ REGISTANCE x y z point class method       bound calculate changeDirection crossing direction directionTo distance distanceTo getDirection getMass getRegistance move moveTo push pushTo rotate setDirection setLocation setMass setRegistance stop velocity velocityTo