我正在研究一个应该打印2D数组的Java程序，“鼠标”需要在该数组中随机移动。如果鼠标指针击中数组的边缘，它将测试鼠标触到的数字是-1（鼠标转义数组）还是-2（鼠标死）。如果移动超过50次，它就会死掉（整个过程在for循环中重复了1000次）。每次鼠标移动时，它将用其上的移动编号替换其上的阵列位置编号。示例：总动作是鼠标完成的动作数：
totalMoves++;
island[r][c] = totalMoves;
程序执行后，应打印如下内容：
~~The mouse drowned in the water!<--<@
W W B B W B W B W W B W W B W
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W 0 0 0 0 0 0 0 0 0 0 6 5 0 B
W 0 0 0 0 0 0 0 0 0 0 7 4 0 W
W 0 0 0 0 0 0 0 0 0 1 8 9 10 11
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W B W B W B B B W B W W W W W
---------------------------------------------------------
FYI，W为-2，B为-1，但打印字符串。问题是鼠标没有向上方打印输出，而是仅向右移动。是的，就像直接向右移动一样：
~~The mouse drowned in the water!<--<@
W W B B W B W B W W B W W B W
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W 0 0 0 0 0 0 0 0 0 0 0 0 0 B
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W 0 0 0 0 0 0 0 0 0 1 2 3 4 5
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W 0 0 0 0 0 0 0 0 0 0 0 0 0 W
W B W B W B B B W B W W W W W
---------------------------------------------------------
我尝试阅读代码OVER和OVER，但是找不到解决方案。这是我的程序：对象类别：
import java.util.Random;
public class Mouse {
final int NUM_ROWS = 10;
final int NUM_COLS = 15;
final int MAX_MOVES = 50;
private int drown = 0;//drown count
private int starve = 0;//starve count
private int escape = 0;//escape count
int[][] island = new int[NUM_ROWS][NUM_COLS];
Random rand = new Random ();
int x = 0;
int y = 0;
public int getSc()// gets starve count
{
return starve;
}
public int getDc()// gets drown count
{
return drown;
}
public int getEc()// gets escape count
{
return escape;
}
public void createIsland()
{
for (int r = 0; r < island.length; r++)
{
for (int c = 0; c < island[r].length; c++)
{
island[r][c] = 0;
}
}
}
public String printIsland()
{
String ans = "";
for (int r = 0; r < island.length; r++)
{
for (int c = 0; c < island[r].length; c++)
{
if(island[r][c] == -1)
{
ans+= "B ";
}
else if(island[r][c] == -2)
{
ans+= "W ";
}
else
{
ans+= island[r][c] + " ";
}
}
ans+="\n";
}
return ans;
}
public void edgeIsland()
{
for(int r = 0; r<island.length;r++)
{
float chance = rand.nextFloat();
if (chance <= .30f)
{
island[r][0] = -1;
}
else
{
island[r][0] = -2;
}
}
for(int r = 0; r<island[0].length;r++)
{
float chance = rand.nextFloat();
if (chance <= 0.30f)
{
island[0][r] = -1;
}
else
{
island[0][r] = -2;
}
}
for(int r = 0; r<island[0].length;r++)
{
float chance = rand.nextFloat();
if (chance <= 0.30f)
{
island[9][r] = -1;
}
else
{
island[9][r] = -2;
}
}
for(int r = 0; r<island.length;r++)
{
float chance = rand.nextFloat();
if (chance <= 0.30f)
{
island[r][14] = -1;
}
else
{
island[r][14] = -2;
}
}
}
public void randomStart()// where the mouse starts out
{
int min1 = 2;
int max1 = 8;
int min2 = 2;
int max2 = 13;
x = rand.nextInt((max1 - min1) + 1) + min1;
y = rand.nextInt((max2 - min2) + 1) + min2;
island[x][y] += 1;
}
public void mouseStart()
{
int totalMoves = 0;
for (int r = x; r < island.length; r++)
{
for (int c = y; c < island[r].length; c++)
{
if(totalMoves<MAX_MOVES)
{
int min1 = 1;
int max1 = 4;
int move = rand.nextInt((max1 - min1) + 1) + min1;
if (move == 1)//up
{
island[r][c] = island[r][c+1];
if (totalMoves == MAX_MOVES)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse wandered" +
" around and starved!<--<@");
starve++;
totalMoves = MAX_MOVES+1;
break;
}
else if (island[r][c] == -2)
{
// System.out.println("________________________" +
//"_________________________");
System.out.println("~~The mouse drowned in" +
" the water!<--<@");
drown++;
totalMoves++;
island[r][c] = totalMoves;
totalMoves = MAX_MOVES+1;
break;
}
else if (island[r][c] == -1)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse found a bridge" +
" and escaped! :) ");
escape++;
totalMoves++;
island[r][c] = totalMoves;
totalMoves = MAX_MOVES+1;
break;
}
else
{
totalMoves++;
island[r][c] = totalMoves;
}
}
else if (move == 2)//down
{
island[r][c] = island[r][c-1];
if (totalMoves == MAX_MOVES)
{
//System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse wandered" +
" around and starved!<--<@");
starve++;
totalMoves = MAX_MOVES+1;
break;
}
else if (island[r][c] == -2)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse drowned in" +
" the water!<--<@");
drown++;
totalMoves++;
island[r][c] = totalMoves;
totalMoves = MAX_MOVES+1;
break;
}
else if (island[r][c] == -1)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse found a bridge" +
" and escaped! :) ");
escape++;
totalMoves++;
island[r][c] = totalMoves;
totalMoves = MAX_MOVES+1;
break;
}
else
{
totalMoves++;
island[r][c] = totalMoves;
}
}
else if (move == 3)//right
{
island[r][c] = island[r+1][c];
if (totalMoves == MAX_MOVES)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse wandered" +
" around and starved!<--<@");
starve++;
totalMoves = MAX_MOVES+1;
break;
}
else if (island[r][c] == -2)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse drowned in" +
" the water!<--<@");
drown++;
totalMoves++;
island[r][c] = totalMoves;
totalMoves = MAX_MOVES+1;
break;
}
else if (island[r][c] == -1)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse found a bridge" +
" and escaped! :) ");
escape++;
totalMoves++;
island[r][c] = totalMoves;
totalMoves = MAX_MOVES+1;
break;
}
else
{
totalMoves++;
island[r][c] = totalMoves;
}
}
else//right
{
island[r][c] = island[r-1][c];
if (totalMoves == MAX_MOVES)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse wandered" +
" around and starved!<--<@");
starve++;
totalMoves = MAX_MOVES+1;
break;
}
else if (island[r][c] == -2)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse drowned in" +
" the water!<--<@");
drown++;
totalMoves++;
island[r][c] = totalMoves;
totalMoves = MAX_MOVES+1;
break;
}
else if (island[r][c] == -1)
{
// System.out.println("________________________" +
// "_________________________");
System.out.println("~~The mouse found a bridge" +
" and escaped! :) ");
escape++;
totalMoves++;
island[r][c] = totalMoves;
totalMoves = MAX_MOVES+1;
break;
}
else
{
totalMoves++;
island[r][c] = totalMoves;
}
}
}
}
}
}
}
测试类别：
public class MouseTest {
public static void main(String[] args) {
int NUM_SIMULATIONS = 1000;
for(int c = 0;c<=NUM_SIMULATIONS; c++)
{
Mouse g = new Mouse();
g.createIsland();
g.edgeIsland();
g.randomStart();
g.mouseStart();
System.out.print(g.printIsland() + "\n---------------------------------------------------------\n\n");
}
}
}
[如果有人可以帮助我解决此问题，将不胜感激。谢谢大家！
问题是您遍历了孤岛的所有索引，但是您甚至没有在主循环中使用鼠标的x和y。我不确定您要做什么，但是由于c仅在增加，因此鼠标移至右侧也就不足为奇了。