Java 如何从.txt文件中读取数字并将其放入二维数组中?
这是一个学校项目。我需要从.txt文件中读取数字并将其放入数组中。当它们在一个数组中之后,我需要将其传递到另一个类中进行数学运算并比较这些数字。唯一的问题是,我无法获取读取.txt文件或将其放入数组的代码 我需要使用Java 如何从.txt文件中读取数字并将其放入二维数组中?,java,Java,这是一个学校项目。我需要从.txt文件中读取数字并将其放入数组中。当它们在一个数组中之后,我需要将其传递到另一个类中进行数学运算并比较这些数字。唯一的问题是,我无法获取读取.txt文件或将其放入数组的代码 我需要使用 if (sq.isMagicSquare()) 要将数组传递给类Square,但会产生错误: required: int[][] found: no arguments reason: actual and formal lists differ in length
if (sq.isMagicSquare())
要将数组传递给类Square,但会产生错误:
required: int[][]
found: no arguments
reason: actual and formal lists differ in length
public class MagicSquareTester
{
public static void main() throws IOException
{
Square sq = null;
System.out.println("Enter the name of your data file (magicData.txt):");
Scanner keyboard = new Scanner(System.in);
String fileName = keyboard.nextLine(); // input data file name from keyboard
Scanner inFile = new Scanner(new File (fileName));
int sqSize = inFile.nextInt(); // read the size
while (sqSize != -1)
{
sq = new Square(sqSize, inFile);
if (sq.isMagicSquare()) //will return true or false
System.out.println("\tWe have a Magic Square!");
else
System.out.println("\tThis is NOT a Magic Square.");
System.out.println(sq);
System.out.println();
sqSize = inFile.nextInt();
}
System.out.println("Of the " + sq.getTotalTested() + " squares tested " + sq.getMagicCount() + " were magic square(s)" );
}
}
public class Square
{
Scanner scan = new Scanner(System.in); //has been imported correctly, btw
int tested = 0, areMagic = 0, sqSize;
boolean magic;
int[][] Square;
public Square(int sqSize, Scanner inFile)
{
Square = new int [sqSize] [sqSize];
}
public void readSquare(Scanner inFile)
{
for(int row = 0; row < sqSize; row++)
for(int col = 0; col < sqSize; col++)
{
Square[row][col] = inFile.nextInt();
tested++;
}
}
public boolean isMagicSquare(int[][] array)
{
Sums testMagic = new Sums();
int rows = testMagic.sumRows(array);
int cols = testMagic.sumCol(array);
int diagonals = testMagic.sumDiagonal(array);
if((rows == cols) && (cols == diagonals) && (diagonals == rows))
{
magic = true;
areMagic++;
}
else
magic = false;
return magic;
}
public int getMagicCount()
{
return areMagic;
}
public int getTotalTested()
{
return tested;
}
}
public class Sums
{
int sum = 0, lastSum = 0, counter1, counter2, counter3;
boolean magic = true;
public int sumRows(int [][] array)
{
for (int row = 0; row < array.length; row++)
{
sum = 0;
for (int col = 0; col < array.length; col++)
{
sum += array[row][col];
System.out.print(sum + " ");
if (lastSum == sum)
{
lastSum = sum;
counter1++;
}
else if (lastSum != sum)
{
magic = false;
System.out.println("This is not a magic square");
row = array.length;
col = array.length;
}
}
}
return counter1;
}
public int sumCol(int [][] array)
{
for (int col = 0; col < array.length; col++)
{
sum = 0;
for (int row = 0; row < array.length; row++)
{
sum += array[row][col];
System.out.print(sum + " ");
if (lastSum == sum)
{
lastSum = sum;
counter2++;
}
else if (lastSum != sum)
{
magic = false;
System.out.println("This is not a magic square");
row = array.length;
col = array.length;
}
}
}
return counter2;
}
public int sumDiagonal(int [][] array)
{
int diagonal1 = 0, diagonal2 = 0;
for (int col = 0; col < array.length; col++)
{
sum = 0;
for (int row = 0; row < array.length; row++)
{
if(row == col)
{
sum += array[row][col];
System.out.print(sum + " ");
diagonal1 = sum;
}
}
}
for (int col = 0; col < array.length; col--)
{
sum = 0;
for (int row = 0; row < array.length; row++)
{
if((row + col) == array.length - 1)
{
sum += array[row][col];
System.out.print(sum + " ");
diagonal2 = sum;
}
}
}
if(diagonal1 == diagonal2)
{
magic = true;
counter2 = counter3;
}
else
counter3 = 0;
return counter3;
}
}
必填项:int[]
找到:没有参数
原因:实际清单和正式清单长度不同
公共级魔术师
{
公共静态void main()引发IOException
{
平方平方=零;
System.out.println(“输入数据文件的名称(magicData.txt):”;
扫描仪键盘=新扫描仪(System.in);
String fileName=keyboard.nextLine();//从键盘输入数据文件名
扫描仪内嵌=新扫描仪(新文件(文件名));
int sqSize=infle.nextInt();//读取大小
while(sqSize!=-1)
{
sq=新正方形(sqSize,填充);
if(sq.isMagicSquare())//将返回true或false
System.out.println(“\t我们有一个魔方!”);
其他的
System.out.println(“\t这不是幻方”);
系统输出打印项次(平方);
System.out.println();
sqSize=infle.nextInt();
}
System.out.println(“测试的“+sq.getTotalTested()+”方块“+sq.getMagicAccount()+”是幻方)”;
}
}
公共课广场
{
Scanner scan=新扫描仪(System.in);//已正确导入,顺便说一句
int tested=0,areMagic=0,sqSize;
布尔魔法;
int[][]平方;
公共广场(int sqSize,扫描仪填充)
{
Square=新整数[sqSize][sqSize];
}
公共空白readSquare(扫描仪填充)
{
for(int row=0;row
另外,如果我的代码看起来格式怪异,我也会道歉。我以前从未在这里发表过文章,我正在尽我所能。我建议您使用java.io.file并将平方和解析操作与文件读取操作分开。 可能是这样的:
public class MathSquareTester {
public static void main (String[] args) throws IOException {
List<Integer> squaredNums = new ArrayList<Integer>();
FileInputStream in = new FileInputStream(file_name);
BufferedReader reader = new BufferedReader(new FileReader(in));
String line = reader.readLine();
while (line != null) {
//Assuming each line represents a separate integer
squaredNums.add((int)Math.pow(Integer.parseInt(line)), 2);
line = reader.readLine();
}
int[] numsArray = new int[squaredNums.size];
squaredNums.toArray(numsArray);
//All of your numbers are now stored in numsArray
}
}
公共类MathSquareTester{
公共静态void main(字符串[]args)引发IOException{
List squaredNums=new ArrayList();
FileInputStream in=新的FileInputStream(文件名);
BufferedReader reader=新的BufferedReader(新文件读取器(in));
字符串行=reader.readLine();
while(行!=null){
//假设每条线都代表