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因此，我正在编写一个2D数组代码，将它排列成一个方形表格，例如10乘10。它填充了X和O以及空格。输入一个阈值，如果X或O周围的索引的百分比也是Xs或Os大于阈值，则该点满足，否则不满意。我已经能够很好地打印表格了，但是我试图做出令人满意的部分，并且我得到了一个数组索引越界异常。我对这意味着什么有了一个想法，但不知道如何让我的代码正常工作，但我担心我将不得不重新设计它。另一件事是，我不确定我是否正确布尔值。ArrayIndexOutOfBoundsException：-1
public class CellSim{
public static void main(String[] args){
char [][] tissue = new char [10][10];
int threshold = 30;
assignCellTypes(tissue, 50, 25);
printTissue(tissue);
System.out.println();
boolean boardSat = true;
boardSat = boardSatisfied(tissue, threshold);
if(boardSat == false){
System.out.println("board is not satisfied");}
if(boardSat == true){
System.out.println("board is satisfied");}
}
public static void printTissue(char[][] tissue){
for(int row = 0;row < tissue.length;row++){
for(int col = 0;col < tissue[row].length;col++){
System.out.print(tissue[row][col] + "\t");
}
System.out.println();
}
}
public static void assignCellTypes(char[][] tissue, int percentBlank, int percentX){
int n = (tissue.length) * (tissue.length);
percentBlank = (int) Math.ceil(n * (percentBlank * .01));
percentX = (int) Math.ceil((n - percentBlank) * (percentX * .01));
int percentO = (int) Math.ceil(n - percentBlank - percentX);
for(int i = 0; i < percentBlank; i++){
while(percentBlank > 0){
int randCell = randInt(0, 9);
int randCell2 = randInt(0, 9);
if(tissue[randCell][randCell2] == '\u0000'){
tissue[randCell][randCell2] = ' ';
break;
}
}
}
for(int i = 0; i < percentX; i++){
while(percentX > 0){
int randCell = randInt(0, 9);
int randCell2 = randInt(0, 9);
if(tissue[randCell][randCell2] == '\u0000'){
tissue[randCell][randCell2] = 'X';
break;
}
}
}
for(int i = 0; i < percentO; i++){
while(percentO > 0){
int randCell = randInt(0, 9);
int randCell2 = randInt(0, 9);
if(tissue[randCell][randCell2] == '\u0000'){
tissue[randCell][randCell2] = 'O';
break;
}
}
}
}
public static boolean isSatisfied(char[][] tissue, int row, int col, int threshold){
int total = 0;
int same = 0;
if(tissue[row][col] == 'X'){
total = 0;
if(tissue[row + 1][col - 1] == 'X'){
same ++;
total ++;
}else if(tissue[row + 1][col - 1] == 'O')
total ++;
if(tissue[row + 1][col] == 'X'){
same ++;
total ++;
}else if(tissue[row + 1][col] == 'O')
total ++;
if(tissue[row + 1][col + 1] == 'X'){
same ++;
total ++;
}else if(tissue[row + 1][col + 1] == 'O')
total ++;
if(tissue[row][col - 1] == 'X'){
same ++;
total ++;
}else if(tissue[row][col - 1] == 'O')
total ++;
if(tissue[row][col + 1] == 'X'){
same ++;
total ++;
}else if(tissue[row][col + 1] == 'O')
total ++;
if(tissue[row - 1][col - 1] == 'X'){
same ++;
total ++;
}else if(tissue[row - 1][col - 1] == 'O')
total ++;
if(tissue[row - 1][col] == 'X'){
same ++;
total ++;
}else if(tissue[row - 1][col] == 'O')
total ++;
if(tissue[row - 1][col + 1] == 'X'){
same ++;
total ++;
}else if(tissue[row - 1][col + 1] == 'O')
total ++;
}
if(tissue[row][col] == 'O'){
total = 0;
if(tissue[row + 1][col - 1] == 'O'){
same ++;
total ++;
}else if(tissue[row + 1][col - 1] == 'X')
total ++;
if(tissue[row + 1][col] == 'O'){
same ++;
total ++;
}else if(tissue[row + 1][col] == 'X')
total ++;
if(tissue[row + 1][col + 1] == 'O'){
same ++;
total ++;
}else if(tissue[row + 1][col + 1] == 'X')
total ++;
if(tissue[row][col - 1] == 'O'){
same ++;
total ++;
}else if(tissue[row][col - 1] == 'X')
total ++;
if(tissue[row][col + 1] == 'O'){
same ++;
total ++;
}else if(tissue[row][col + 1] == 'X')
total ++;
if(tissue[row - 1][col - 1] == 'O'){
same ++;
total ++;
}else if(tissue[row - 1][col - 1] == 'X')
total ++;
if(tissue[row - 1][col] == 'O'){
same ++;
total ++;
}else if(tissue[row - 1][col] == 'X')
total ++;
if(tissue[row - 1][col + 1] == 'O'){
same ++;
total ++;
}else if(tissue[row - 1][col + 1] == 'X')
total ++;
}
if(tissue[row][col] == ' '){
return true;
}if(total == 0){
return false;
}else if(((same/total) * 100) >= threshold){
return true;
}else{ return false;}
}
public static boolean boardSatisfied(char[][] tissue, int threshold){
boolean isSat = true;
while(isSat == true){
for(int row = 0;row < tissue.length;row++){
for(int col = 0;col < tissue[row].length;col++){
isSat = isSatisfied(tissue, row, col, threshold);
}
}
}
if(isSat == false){
return false;
}else{return true;}
}
public static int randInt(int min, int max){
int range = (max - min) + 1;
return(int)(Math.random() * range) + min;
}
}
异常告诉你发生错误的文件和行号。我建议在调试器中逐步完成。只要你有真实的数据告诉你发生了什么，这很容易解决。 – duffymo 2014-11-24 23:19:49
今天是学习[如何调试]的好日子（http://ericlippert.com/2014/03/05/how-to-debug-small-programs/）。 – 2014-11-24 23:23:39
“我对这意味着什么有一个想法_”这意味着你试图访问一个不存在的数组元素。例如，如果您有一个长度为5（最后一个索引为4）的数组，则不能访问元素10，因为它不存在。 – csmckelvey 2014-11-24 23:25:26