2d world of ants and doodlebugs, JAVA Programming

2d world of ants and doodlebugs, JAVA Programming

Assignment Help:

We have to create a world class that contains a 2d array
then create an abstract class called organism that contains move() method
the organism should move randomly one step at the time.

public void move() {
Random r = new Random();
int a = r.nextInt(4);
if (a == 0) {
if (y - 1 >= 0 && world.getAt(x, y - 1) == null) {
y -= 1;
world.setAt(x, y, this);

}
} else if (a == 1) {
if (y + 1 < World.WORLDSIZE && world.getAt(x, y + 1) == null) {
y += 1;
world.setAt(x, y, this);
}
} else if (a == 2) {
if (x - 1 >= 0 && world.getAt(x - 1, y) == null) {
x -= 1;
world.setAt(x, y, this);

}
} else if (a == 3) {
if (x + 1 < World.WORLDSIZE && world.getAt(x + 1, y) == null) {
x += 1;
world.setAt(x, y, this);

}
}
this is my code but the organisms are not moving

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