/*
* The java program that reads an input file input.txt
* and then reads the contens of file.
* the program throws file not found exception if file not found.
* The program throws DimensionMismatchException if mismatch of dimension.
* The program throws NumberFormatException if mismatch of data read.
* */
//FormatChecker.java
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class FormatChecker {
public static void main(String[] args) {
String fileName=\"input.txt\";
//calling checkFormat
checkFormat(fileName);
}
//Method checkFormat that takes string and check for
//errors otherwise reads the file and print to console
private static void checkFormat(String fileName) {
Scanner filescanner=null;
try {
//thorws FileNotFoundException error if file not found
filescanner=new Scanner(new File(fileName));
} catch (FileNotFoundException e) {
System.out.println(e.getMessage());
}
int rows=0;
int cols=0;
double[][] arr;
String dimensions[]=filescanner.nextLine().split(\" \");
try
{
//thorws DimensionMismatchException error if mismatch of dimension
if(dimensions.length>2)
throw new DimensionMismatchException(\"Dimension mismatch\");
} catch (DimensionMismatchException e1) {
e1.printStackTrace();
}
try {
//thorws NumberFormatException error if mismatch of reading values
rows=Integer.parseInt(dimensions[0]);
cols=Integer.parseInt(dimensions[1]);
arr=new double[rows][cols];
System.out.println(\"File contents\");
for (int i = 0; i < arr.length; i++)
{
for (int j = 0; j < arr[i].length; j++)
{
arr[i][j]=filescanner.nextDouble();
System.out.printf(\"%6.1f\",arr[i][j]);
}
System.out.println();
}
} catch (NumberFormatException e) {
System.out.println(e.getMessage());
}
}
}
------------------------------------------------------------------------
//User defined DimensionMismatchException class
//that extends the Exception class
//DimensionMismatchException.java
public class DimensionMismatchException extends Exception {
public DimensionMismatchException(String msg) {
super(msg);
}
}
------------------------------------------------------------------------
input.txt
5 6
2.5 0 1 0 0 0
0 -1 4 0 0 0
0 0 0 0 1.1 0
0 2 0 0 5 0
0 -3.14 0 0 0 0
------------------------------------------------------------------------
File contents
2.5 0.0 1.0 0.0 0.0 0.0
0.0 -1.0 4.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 1.1 0.0
0.0 2.0 0.0 0.0 5.0 0.0
0.0 -3.1 0.0 0.0 0.0 0.0
Note : DimensionMismatchException class is included
Solution
/*
* The java program that reads an input file input.txt
* and then reads the contens of file.
* the program throws file not found exception if file not found.
* The program throws DimensionMismatchException if mismatch of dimension.
* The program throws NumberFormatException if mismatch of data read.
* */
//FormatChecker.java
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class FormatChecker {
public static void main(String[] args) {
String fileName=\"input.txt\";
//calling check.
Andreas Schleicher presents at the launch of What does child empowerment mean...
The java program that reads an input file input.txt an.pdf
1. /*
* The java program that reads an input file input.txt
* and then reads the contens of file.
* the program throws file not found exception if file not found.
* The program throws DimensionMismatchException if mismatch of dimension.
* The program throws NumberFormatException if mismatch of data read.
* */
//FormatChecker.java
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class FormatChecker {
public static void main(String[] args) {
String fileName="input.txt";
//calling checkFormat
checkFormat(fileName);
}
//Method checkFormat that takes string and check for
//errors otherwise reads the file and print to console
private static void checkFormat(String fileName) {
Scanner filescanner=null;
try {
//thorws FileNotFoundException error if file not found
filescanner=new Scanner(new File(fileName));
} catch (FileNotFoundException e) {
System.out.println(e.getMessage());
}
int rows=0;
int cols=0;
double[][] arr;
2. String dimensions[]=filescanner.nextLine().split(" ");
try
{
//thorws DimensionMismatchException error if mismatch of dimension
if(dimensions.length>2)
throw new DimensionMismatchException("Dimension mismatch");
} catch (DimensionMismatchException e1) {
e1.printStackTrace();
}
try {
//thorws NumberFormatException error if mismatch of reading values
rows=Integer.parseInt(dimensions[0]);
cols=Integer.parseInt(dimensions[1]);
arr=new double[rows][cols];
System.out.println("File contents");
for (int i = 0; i < arr.length; i++)
{
for (int j = 0; j < arr[i].length; j++)
{
arr[i][j]=filescanner.nextDouble();
System.out.printf("%6.1f",arr[i][j]);
}
System.out.println();
}
} catch (NumberFormatException e) {
System.out.println(e.getMessage());
}
4. * The java program that reads an input file input.txt
* and then reads the contens of file.
* the program throws file not found exception if file not found.
* The program throws DimensionMismatchException if mismatch of dimension.
* The program throws NumberFormatException if mismatch of data read.
* */
//FormatChecker.java
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class FormatChecker {
public static void main(String[] args) {
String fileName="input.txt";
//calling checkFormat
checkFormat(fileName);
}
//Method checkFormat that takes string and check for
//errors otherwise reads the file and print to console
private static void checkFormat(String fileName) {
Scanner filescanner=null;
try {
//thorws FileNotFoundException error if file not found
filescanner=new Scanner(new File(fileName));
} catch (FileNotFoundException e) {
System.out.println(e.getMessage());
}
int rows=0;
int cols=0;
double[][] arr;
String dimensions[]=filescanner.nextLine().split(" ");
5. try
{
//thorws DimensionMismatchException error if mismatch of dimension
if(dimensions.length>2)
throw new DimensionMismatchException("Dimension mismatch");
} catch (DimensionMismatchException e1) {
e1.printStackTrace();
}
try {
//thorws NumberFormatException error if mismatch of reading values
rows=Integer.parseInt(dimensions[0]);
cols=Integer.parseInt(dimensions[1]);
arr=new double[rows][cols];
System.out.println("File contents");
for (int i = 0; i < arr.length; i++)
{
for (int j = 0; j < arr[i].length; j++)
{
arr[i][j]=filescanner.nextDouble();
System.out.printf("%6.1f",arr[i][j]);
}
System.out.println();
}
} catch (NumberFormatException e) {
System.out.println(e.getMessage());
}
6. }
}
------------------------------------------------------------------------
//User defined DimensionMismatchException class
//that extends the Exception class
//DimensionMismatchException.java
public class DimensionMismatchException extends Exception {
public DimensionMismatchException(String msg) {
super(msg);
}
}
------------------------------------------------------------------------
input.txt
5 6
2.5 0 1 0 0 0
0 -1 4 0 0 0
0 0 0 0 1.1 0
0 2 0 0 5 0
0 -3.14 0 0 0 0
------------------------------------------------------------------------
File contents
2.5 0.0 1.0 0.0 0.0 0.0
0.0 -1.0 4.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 1.1 0.0
0.0 2.0 0.0 0.0 5.0 0.0
0.0 -3.1 0.0 0.0 0.0 0.0
Note : DimensionMismatchException class is included
![/*
* The java program that reads an input file input.txt
* and then reads the contens of file.
* the program throws file not found exception if file not found.
* The program throws DimensionMismatchException if mismatch of dimension.
* The program throws NumberFormatException if mismatch of data read.
* */
//FormatChecker.java
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class FormatChecker {
public static void main(String[] args) {
String fileName="input.txt";
//calling checkFormat
checkFormat(fileName);
}
//Method checkFormat that takes string and check for
//errors otherwise reads the file and print to console
private static void checkFormat(String fileName) {
Scanner filescanner=null;
try {
//thorws FileNotFoundException error if file not found
filescanner=new Scanner(new File(fileName));
} catch (FileNotFoundException e) {
System.out.println(e.getMessage());
}
int rows=0;
int cols=0;
double[][] arr;](https://image.slidesharecdn.com/thejavaprogramthatreadsaninputfileinput-230408100738-606c3cc4/85/The-java-program-that-reads-an-input-file-input-txt-an-pdf-1-320.jpg)
![String dimensions[]=filescanner.nextLine().split(" ");
try
{
//thorws DimensionMismatchException error if mismatch of dimension
if(dimensions.length>2)
throw new DimensionMismatchException("Dimension mismatch");
} catch (DimensionMismatchException e1) {
e1.printStackTrace();
}
try {
//thorws NumberFormatException error if mismatch of reading values
rows=Integer.parseInt(dimensions[0]);
cols=Integer.parseInt(dimensions[1]);
arr=new double[rows][cols];
System.out.println("File contents");
for (int i = 0; i < arr.length; i++)
{
for (int j = 0; j < arr[i].length; j++)
{
arr[i][j]=filescanner.nextDouble();
System.out.printf("%6.1f",arr[i][j]);
}
System.out.println();
}
} catch (NumberFormatException e) {
System.out.println(e.getMessage());
}](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)