目前我正在撰写“生命游戏”计划。然而，当我尝试打印出随机数组时，没有任何反应，当我尝试运行预构建的网格时，我得到一个越界错误。
请记住，我已经尝试过调试自己并让其他同伴看过这个问题，他也无法弄明白。
任何帮助将不胜感激。 （我为缺乏评论而道歉。我意识到这是多么不专业，但目前我只是想让它发挥作用。）
这是我的主要文件
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.*;
public class Life
{
private int k;
private int l;
private boolean[][] lifeArray = new boolean[k][l];
private int counter = 0;
public Life(int thisK, int thisL)
{
lifeArray = new boolean[k][l];
k = thisK;
l = thisL;
}
public void initialGrid()
{
int r = lifeArray.length / 3; // Set up a third of the way down
int c = lifeArray[0].length / 3; // Set up a third of the way over
for (int a = 0; a < lifeArray.length; a++)
for (int b = 0; b < lifeArray[0].length; b++)
lifeArray[a][b] = false; // initialize the array to false
lifeArray[r][c + 3] = lifeArray[r][c + 8] = true; // top row
lifeArray[r + 1][c + 1] = lifeArray[r + 1][c + 2] = true; // middle 2
// le.t
lifeArray[r + 1][c + 9] = lifeArray[r + 1][c + 10] = true; // middle 4
lifeArray[r + 1][c + 4] = lifeArray[r + 1][c + 5] = true; // middle 4
lifeArray[r + 1][c + 6] = lifeArray[r + 1][c + 7] = true; // middle 2
// right
lifeArray[r + 2][c + 3] = lifeArray[r + 2][c + 8] = true; // bottom row
}
public void randomBuild() {
Random rn = new Random();
int counter = 0;
for (int i = 0; i < lifeArray.length; i++) {
for (int j = 0; j < lifeArray[0].length; j++) {
if (rn.nextInt(10) <= 3) {
lifeArray[i][j] = true;
System.out.println("*");
} else {
System.out.println(" ");
}
counter++;
}
System.out.println("\n");
}
printBoard();
}
public void fileInput(String theFile, String directory) throws IOException {
File file = new File(theFile, directory);
Scanner scanIt = new Scanner(file);
}
public void prebuiltGrid() {
//clearGrid();
initialGrid();
printBoard();
}
public void clearGrid() {
// Initializes array to all false
for (int i = 0; i < lifeArray.length; i++) {
for (int j = 0; j < lifeArray[0].length; j++) {
lifeArray[i][j] = false;
}
}
}
public void nextGen() {
for (int i = 0; i < lifeArray.length; i++) {
for (int j = 0; j < lifeArray[0].length; j++) {
if (lifeArray[i + 1][j] == true) {
counter++;
} else if (lifeArray[i - 1][j] == true) {
counter++;
} else if (lifeArray[i][j + 1] == true) {
counter++;
} else if (lifeArray[i][j - 1] == true) {
counter++;
} else if (lifeArray[i + 1][j + 1] == true) {
counter++;
} else if (lifeArray[i - 1][j - 1] == true) {
counter++;
}
if (counter >= 4 || counter <= 1) {
lifeArray[i][j] = false;
} else if (counter == 3) {
lifeArray[i][j] = true;
}
counter = 0;
}
}
}
public void printBoard()
{
int lineCount = 0;
for(int i = 0; i < lifeArray.length; i++)
{
for(int j = 0; j < lifeArray[0].length; j++)
{
if(lifeArray[i][j] == true)
{
System.out.println("*");
}
else
{
System.out.println(" ");
}
lineCount++;
}
System.out.println("\n");
}
}
}
这是我的跑步者
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.*;
public class Life
{
private int k;
private int l;
private boolean[][] lifeArray = new boolean[k][l];
private int counter = 0;
public Life(int thisK, int thisL)
{
lifeArray = new boolean[k][l];
k = thisK;
l = thisL;
}
public void initialGrid()
{
int r = lifeArray.length / 3; // Set up a third of the way down
int c = lifeArray[0].length / 3; // Set up a third of the way over
for (int a = 0; a < lifeArray.length; a++)
for (int b = 0; b < lifeArray[0].length; b++)
lifeArray[a][b] = false; // initialize the array to false
lifeArray[r][c + 3] = lifeArray[r][c + 8] = true; // top row
lifeArray[r + 1][c + 1] = lifeArray[r + 1][c + 2] = true; // middle 2
// le.t
lifeArray[r + 1][c + 9] = lifeArray[r + 1][c + 10] = true; // middle 4
lifeArray[r + 1][c + 4] = lifeArray[r + 1][c + 5] = true; // middle 4
lifeArray[r + 1][c + 6] = lifeArray[r + 1][c + 7] = true; // middle 2
// right
lifeArray[r + 2][c + 3] = lifeArray[r + 2][c + 8] = true; // bottom row
}
public void randomBuild() {
Random rn = new Random();
int counter = 0;
for (int i = 0; i < lifeArray.length; i++) {
for (int j = 0; j < lifeArray[0].length; j++) {
if (rn.nextInt(10) <= 3) {
lifeArray[i][j] = true;
System.out.println("*");
} else {
System.out.println(" ");
}
counter++;
}
System.out.println("\n");
}
printBoard();
}
public void fileInput(String theFile, String directory) throws IOException {
File file = new File(theFile, directory);
Scanner scanIt = new Scanner(file);
}
public void prebuiltGrid() {
//clearGrid();
initialGrid();
printBoard();
}
public void clearGrid() {
// Initializes array to all false
for (int i = 0; i < lifeArray.length; i++) {
for (int j = 0; j < lifeArray[0].length; j++) {
lifeArray[i][j] = false;
}
}
}
public void nextGen() {
for (int i = 0; i < lifeArray.length; i++) {
for (int j = 0; j < lifeArray[0].length; j++) {
if (lifeArray[i + 1][j] == true) {
counter++;
} else if (lifeArray[i - 1][j] == true) {
counter++;
} else if (lifeArray[i][j + 1] == true) {
counter++;
} else if (lifeArray[i][j - 1] == true) {
counter++;
} else if (lifeArray[i + 1][j + 1] == true) {
counter++;
} else if (lifeArray[i - 1][j - 1] == true) {
counter++;
}
if (counter >= 4 || counter <= 1) {
lifeArray[i][j] = false;
} else if (counter == 3) {
lifeArray[i][j] = true;
}
counter = 0;
}
}
}
public void printBoard()
{
int lineCount = 0;
for(int i = 0; i < lifeArray.length; i++)
{
for(int j = 0; j < lifeArray[0].length; j++)
{
if(lifeArray[i][j] == true)
{
System.out.println("*");
}
else
{
System.out.println(" ");
}
lineCount++;
}
System.out.println("\n");
}
}
}
答案 0 :(得分：2)
k和l为0。
public Life(int thisK, int thisL)
{
k = thisK;
l = thisL;
lifeArray = new boolean[k][l];
}