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Detect when your robot will hit a wall soon, and alter your course (or drive backwards) if that's the case?For detecting nearby walls, you might want to check your robots current position with getX, getY, compare this to the height and width of the arena getBattlefieldWidth, getBattlefieldHeight.To find out whether you are driving towards the wall, you can check getHeading and the sign of getVelocity.(If you want a more specific answer, try pointing out which aspect of the problem you are having trouble with.).
Project Summary The Pikachu robot is a Robocode robot that tracks an enemy robot's energy level. If the energy level of the enemy drops, Pikachu assumes that the enemy fired a bullet and changes direction. Then Pikachu locates the enemy using its radar, aims its gun, and fires. Project on GitHub The Pikachu robot project.
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