Thread: read int from file into 3d array - FileReader? Help pls

Hello there,

i got an txt file with int values. Each line has exactly one number. Now i want to read those numbers into an 3d array. But i fail to do so. Can someone help me?
i copied test.txt to the project and renamed it, so it fits the code.

This is the code i have so far:

import java.io.BufferedReader;
import java.io.FileReader;
 
import java.util.Arrays;
import java.util.Scanner;
 
public class lesen {
	public static void main (String args[]) throws Exception {
		//Scanner sc = new Scanner(new BufferedReader(new FileReader("sample.txt")));
		FileReader inputFile = new FileReader("Datenzumlesen.txt");
		int boxes = 10;  
		int rows = 10;
	    int columns = 10;
 
	    int [][][] myArray = new int[boxes][rows][columns];
 
	    	for(int i=0;i<10;i++) {
	    		for (int j=0;j<10;j++) {
	    			for(int k=0;k<10;k++) {
	    				inputFile.read(myArray[i][j][k]); //(myArray[i][j][k]);
	    			}
	    		}
	    	}
 
	    inputFile.close();
 
	    for (int i=0; i < 10; i++) {
			for (int j=0; j < 10; j++) {
				for (int k=0; k < 10; k++) {
					//System.out.println("Test");
					System.out.print(myArray[i][j][k]+" ");
				}
				System.out.println("");
			}
		System.out.println("i ist "+i);
		}
	}		
}

For creation of the values and saving i used the following code:

import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
import java.io.File;
 
 
public class speichern{
 
	public static void main (String args[]) throws FileNotFoundException {
		PrintWriter outputFile = new PrintWriter("test.txt");
 
		int [][][]array = new int[10][10][10];
		int []array2 = new int[10];
		int i = 0;
		int j = 0;
		int k = 0;
 
		int min = 50;
	    int max = 100;
 
	    //Generate random int value from 50 to 100 
	    System.out.println("Random value in int from "+min+" to "+max+ ":");
 
		for (i=0; i < 10; i++) {
			for (j=0; j < 10; j++) {
				for (k=0; k < 10; k++) {
					//System.out.println("Test");
					array[i][j][k] = (int)Math.floor(Math.random()*(max-min+1)+min);
					outputFile.println(array[i][j][k]);
				}
			}
			//array2[i] = (int)Math.floor(Math.random()*(max-min+1)+min);
			//outputFile.println(array2[i]);
		}
		outputFile.close();
 
		for (i=0; i < 10; i++) {
			for (j=0; j < 10; j++) {
				for (k=0; k < 10; k++) {
					//System.out.println("Test");
					System.out.print(array[i][j][k]+" ");
				}
				System.out.println("");
			}
		System.out.println("i ist "+i);
		}
 
		System.out.println(array[8][1][3]);
	}
 
}

Hope someone can help me out

But i fail to do so

Please explain what happens when the program is executed? What does "fail" mean?

Ok, that is an error from the compiler saying the there is no read method in the Reader class that takes an int as an argument.

The file that is it trying to read contains text created by the println method. The text "123" is a String and is not the same as the int value 123.
An easy way to read text from a file and convert it to an int value is with the Scanner class's nextInt method.