This Java program reads a file and displays each line along with its corresponding line number. It uses a FileInputStream to open the file, a LineNumberReader to read the file line by line and get the line number, and prints each line and number. It also prints the total number of lines in the file. Any exceptions are caught and printed.

1. JAVA WEEK4(B)
/* Week 4 : b) Write a Java program that reads a file and displays the file on the
screen, with a line number before each line. */
import java.io.*;
import java.util.*;
public class LabPro9
{
public static void main(String args[])
{
try
{
FileInputStream f=new FileInputStream("run");
LineNumberReader lr=new LineNumberReader(new InputStreamReader(f));
String data;
while((data=lr.readLine())!=null)
{
System.out.println(lr.getLineNumber()+":"+data);
}
System.out.println("total lines"+lr.getLineNumber());
f.close();
}
catch(Exception e)
{System.out.println("err"+e);}
}
}
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