我正在尝试将文本文件读入30x30字符数组。扫描仪没有nextChar方法,所以我假设我要使用next()然后将该行拆分为chars?我忙着使用3 for循环来做到这一点,一个用于String,一个用于行,一个用于列。
到目前为止,这是我的代码..
public static void main(String[] args) throws FileNotFoundException {
final int cellSize = 30; // grid size
char[][] chargrid = new char[cellSize][cellSize];
File inputFile = new File("E:\\workspace\\Life2\\bin\\Sample input.txt");
Scanner in = new Scanner(inputFile);
char testchar;
while(in.hasNext()){
String s = in.next();
for (int i=0; i<s.length();i++){
testchar = s.charAt(i);
现在我会为数组行和放大器执行2 for语句列然后设置chargrid [i] [j] = testchar例如?
任何帮助都将不胜感激。
答案 0 :(得分:0)
据我在你的评论中看到,如果字符是'X',你想要一个带有布尔值的2D数组,所以我在我的代码中填充了两个数组 - 一个实际上是字符,一个是真或假,取决于角色是否为“X”。还有一些system.outs可以更好地理解它是如何工作的。我在出现时删除换行符('\ n')(不知道你是否想要)
public static void main(String[] args) {
final int cellSize = 30; // grid size
char[][] chargrid = new char[cellSize][cellSize];
boolean[][] chargridIsX = new boolean[cellSize][cellSize];
File inputFile = new File("input.txt");
FileInputStream is = null;
try {
is = new FileInputStream(inputFile);
int n = -1;
int rowCount = 0;
int colCount = 0;
while( (n=is.read()) !=-1){
char readChar = (char) n;
if(readChar!='\n'){//This removes the linebreaks - dont know if you want that
chargrid[rowCount][colCount] = readChar;
if(readChar=='X') { // Here actually set true or false if character is 'X'
chargridIsX[rowCount][colCount] = true;
System.out.println("row "+rowCount+" col "+colCount + " = " + readChar + " " + true);
}else {
chargridIsX[rowCount][colCount] = false;
System.out.println("row "+rowCount+" col "+colCount + " = " + readChar+ " " + false);
}
if(rowCount++ >= cellSize-1){
System.out.println("new col");
rowCount = 0;
if(colCount++ >= cellSize-1){
//ARRAY IS FULL
System.out.println("full");
break;
}
}
}
}
} catch (FileNotFoundException e) {
//could not get Inputstream from file
e.printStackTrace();
} catch (IOException e) {
// problem with the inputstream while reading
e.printStackTrace();
}
顺便说一句。我正在从输入流中读取字符而不是使用扫描仪,希望这没关系 - 否则请告诉我
对于什么这可能是好的