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File Programs

The document contains two Java classes for file handling. The first class, FileHandling, prompts the user for a file name and checks its existence, readability, writability, and other properties. The second class, FileDemo, reads a specified text file and counts the number of characters, words, and lines, handling potential file-related exceptions.

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lakshmipriya25112004
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16 views3 pages

File Programs

The document contains two Java classes for file handling. The first class, FileHandling, prompts the user for a file name and checks its existence, readability, writability, and other properties. The second class, FileDemo, reads a specified text file and counts the number of characters, words, and lines, handling potential file-related exceptions.

Uploaded by

lakshmipriya25112004
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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import java.io.

*;
import java.util.*;
public class FileHandling {

public static String getFileExtension(File file) {


String name = file.getName();
int lastIndexOf = name.lastIndexOf(".");
if (lastIndexOf == -1) {
return ""; // empty extension
}
return name.substring(lastIndexOf);
}

public static void main(String[] args) {


System.out.println("Enter the file name");
Scanner in = new Scanner(System.in);
String s = in.nextLine();
File f1= new File(s);
System.out.println("------------------------");
System.out.println("File name: "+f1.getName());
System.out.println(f1.exists()?"exists":"Does not exist");
if(f1.exists())
{
if(f1.canRead()&&f1.canWrite())
{
System.out.println("File is both Readable and Writable.");
}
else if(f1.canRead())
{
System.out.println("Readable: "+f1.canRead());
}
else if(f1.canWrite())
{
System.out.println("Writable: "+f1.canWrite());
}
System.out.println("Path: "+f1.getPath());
System.out.println("Absolute path name: "+f1.getAbsolutePath());
System.out.println("is file: "+f1.isFile());
System.out.println("is directory: "+f1.isDirectory());
System.out.println("File length: "+f1.length()+" bytes");
System.out.println("Hidden file: "+f1.isHidden());
System.out.println("File type:"+getFileExtension(f1));

}
}
}

***
import java.io.*;
class FileDemo
{
public static void main(String args[])
{
try
{
int lines=0,chars=0,words=0;
int code=0;
FileInputStream fis = new FileInputStream("sample.txt");
while(fis.available()!=0)
{
code = fis.read();
if(code!=10)
chars++;
if(code==32)
words++;
if(code==13)
{
lines++;
words++;
}
}
System.out.println("No.of characters = "+chars);
System.out.println("No.of words = "+(words));
System.out.println("No.of lines = "+(lines));
fis.close();
}
catch(FileNotFoundException e)
{
System.out.println("Cannot find the specified file...");
}
catch(IOException i)
{
System.out.println("Cannot read file...");
}
}
}

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