我必须读入一个名为test.txt的文本文件。文本文件的第一行是两个整数。这些整数告诉您2D char数组的行和列。文件的其余部分包含字符。该文件看起来有点像:4 4 file WITH SOME INFO,只是垂直地叠在一起,而不是水平地。然后,我必须使用嵌套的for循环将文件的其余内容读取到2D char[][]数组中。我不应该从一个数组复制到另一个数组。这是我目前掌握的代码。我在将每个字符逐行读取到2D字符数组中时遇到了问题。帮助已经为此工作了几个小时。
public static void main(String[] args)throws IOException
{
File inFile = new File("test.txt");
Scanner scanner = new Scanner(inFile);
String[] size = scanner.nextLine().split("\s");
char[][] array = new char[Integer.parseInt(size[0])][Integer.parseInt(size[1])];
for(int i=0; i < 4; i++) {
array[i] = scanner.nextLine().toCharArray();
}
for(int k = 0; k < array.length; k++){
for(int s = 0; s < array[k].length; s++){
System.out.print(array[k][s] + " ");
}
System.out.println();
}
scanner.close();
}
}
如果我理解正确,文件格式类似
4 4
FILE
WITH
SOME
INFO
修改如下
Scanner scanner = new Scanner(inFile);
String[] size = scanner.nextLine().split("\s");
char[][] array = new char[Integer.parseInt(size[0])][Integer.parseInt(size[1])];
for(int i=0; i < rows; i++) {
array[i] = scanner.nextLine().toCharArray();
}
上面的代码用于初始化您的char数组。为了打印相同的内容,你可以做一些类似的事情
Arrays.deepToString(array);
复制Tirath的文件格式:
4 4文件与一些信息
我会把它传递到一个2d数组中,如下所示:
public static void main(String[] args){
char[][] receptor = null; //receptor 2d array
char[] lineArray = null; //receptor array for a line
FileReader fr = null;
BufferedReader br = null;
String line = " ";
try{
fr = new FileReader("test.txt");
br = new BufferedReader(fr);
line = br.readLine();//initializes line reading the first line with the index
int i = (int) (line.toCharArray()[0]-48); //we convert line to a char array and get the fist index (i) //48 = '0' at ASCII
int j = (int)(line.toCharArray()[1]-48); // ... get the second index(j)
receptor = new char[i][j]; //we can create our 2d receptor array using both index
for(i=0; i<receptor.length;i++){
line = br.readLine(); //1 line = 1 row
lineArray = line.toCharArray(); //pass line (String) to char array
for(j=0; j<receptor[0].length; j++){ //notice that we loop using the length of i=0
receptor[i][j]=lineArray[j]; //we initialize our 2d array after reading each line
}
}
}catch(IOException e){
System.out.println("I/O error");
}finally{
try {
if(fr !=null){
br.close();
fr.close();
}
} catch (IOException e) {
e.printStackTrace();
}
} //end try-catch-finally
}