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Requirement
In this assignment you will write a graphics-based program to do a random walk, sometimes also known as a drunkard’s walk. This random walk simulates the wandering of an intoxicated person on a square street grid. The drunkard will start out in the middle of the grid and will randomly pick one of the four compass directions, and take a step in that direction, then another step from that new location in a random direction, etc.
This assignment will give you practice with creating classes, using loops, using the java library for random number generation, doing console-based IO, and drawing to a graphics window. Also you’ll get practice in general program development.
Analysis
Randow Walk，即随机游走问题，相似布朗运动，物体在下一刻走动的方向齐全是随机的。本题利用随机数生成器来模仿下一刻的方位。框架应用 java 的 awt 包实现了 UI 局部，咱们只须要将随机算法退出到提供的框架中。
解题的要害是理解随机数生成器的用法，依据提供的框架，找到对应函数入口，依据给定的测试集进行调试即可。
Tips
从测试函数入口动手
private void testTranslate(Impoint loc, int deltaX, int deltaY) {
…
ImPoint p2 = loc.translate(deltaX, deltaY);
…
}
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因而咱们须要实现 ImPoint 类，以及 translate 办法，外围代码如下
class ImPoint {
private int x;
private int y;
…
public Impoint translate(int deltaX, int deltaY) {
Random r = new Random();
int x = deltaX + nextInt(2) - 1;
int y = deltaY + nextInt(2) - 1;
return new Impoint(x, y);}
…
}
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