Java 如何从文本文件中获取字符并将其放入2D数组中?
例如:Java 如何从文本文件中获取字符并将其放入2D数组中?,java,Java,例如: -8-88-8-8-8--8 -8-8-8-8-8-8-8 *-8-8-8-8--8-8 8--8-8-8-8--8- 逐行读取文本文件 按-拆分字符串,以便让字符数组将其添加到2d字符数组中 最简单的方法是使用String方法 因此,如果您使用的是BufferedReader ArrayList<String> list = new ArrayList<String>(); BufferedReader br = new BufferedR
-8-88-8-8-8--8
-8-8-8-8-8-8-8
*-8-8-8-8--8-8
8--8-8-8-8--8-
-
拆分字符串,以便让字符数组将其添加到2d字符数组中最简单的方法是使用String方法 因此,如果您使用的是BufferedReader
ArrayList<String> list = new ArrayList<String>();
BufferedReader br = new BufferedReader(new FileReader("file"));
while ((thisLine = br.readLine()) != null) {
list.add(thisLine);
}
// finally convert the arraylist to a char[]
char[] firstDimension = new char[list.size()];
for (int i = 0; i < list.length; i++) {
firstDimension[i] = list.get(i).toCharArray();
}
ArrayList list=new ArrayList();
BufferedReader br=新BufferedReader(新文件读取器(“文件”);
而((thisLine=br.readLine())!=null){
列表。添加(此行);
}
//最后将arraylist转换为char[]
char[]firstDimension=new char[list.size()];
for(int i=0;i
char[]firsDimension不是2d。试一试
try {
List<String> list = new ArrayList<String>();
String thisLine = null;
BufferedReader br;
br = new BufferedReader(new FileReader("/path/to/file/yourfile.txt"));
while ((thisLine = br.readLine()) != null) {
list.add(thisLine);
}
char[][] firstDimension = new char[list.size()][];
for (int i = 0; i < list.size(); i++) {
firstDimension[i] = list.get(i).toCharArray();
}
//print values
for (int i=0;i<firstDimension.length;i++) {
for (int j=0;j<firstDimension[i].length;j++) {
System.out.println(firstDimension[i][j]);
}
}
} catch (Exception e) {
e.printStackTrace();
}
试试看{
列表=新的ArrayList();
字符串thisLine=null;
缓冲剂;
br=new BufferedReader(new FileReader(“/path/to/file/yourfile.txt”);
而((thisLine=br.readLine())!=null){
列表。添加(此行);
}
char[][]firstDimension=new char[list.size()][];
对于(int i=0;i 对于(int i=0;我是否举例说明文件的输入行或所需的2D输出数组?很简单,您需要按照我的回答中的两个步骤进行操作?如果im使用扫描仪,会是什么情况?bufferedreader可能更适合此情况,但如果我需要,则使用扫描仪逐行读取要打印双数组,我只需要我写的内容,不需要其他内容??
try {
Scanner scanner = new Scanner(new File(
"/home/sinan/Desktop/yourfile.txt"));
scanner.useDelimiter(System.getProperty("line.separator"));
ArrayList<String> list = new ArrayList<String>();
while (scanner.hasNext()) {
list.add(scanner.next());
}
scanner.close();
// finally convert the arraylist to a char[][]
char[][] firstDimension = new char[list.size()][];
for (int i = 0; i < list.size(); i++) {
firstDimension[i] = list.get(i).toCharArray();
}
for (int i = 0; i < firstDimension.length; i++) {
for (int j = 0; j < firstDimension[i].length; j++) {
System.out.println(firstDimension[i][j]);
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}