Read One File And Write Other File

In this Program we two file and we copy data of first.txt file in second.txt file using java code

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyData {

    public static void main(String[] args) throws IOException {
    String pathInput="D:\\a\\first.txt";
    String pathOutput="D:\\a\\second.txt";
    FileInputStream in=null;
    FileOutputStream out=null;
    try {
        in=new FileInputStream(pathInput);
        out=new FileOutputStream(pathOutput);
        int c;
        while ((c=in.read())!=-1) {
            out.write(c);
        }
    } catch (Exception e) {
        System.out.println(e);
    }finally{
        if (!(in==null)) {
            in.close();
        }
        if (!(out==null)) {
            out.close();
        }
       
    }
    System.out.println("Copy Data");
}
   
}

Read File LIne By Line In Java

 In this program we read a file line by line using buffered reader

package filles;
import interview_set1.fileRead;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileReader;

public class ReadFiles {
public static void main(String[] args) {
    String path="D:\\a\\hi.txt";
    BufferedReader br=null;
    try {
        FileReader fr=new FileReader(path);
        br=new BufferedReader(fr);
        String line;
        while ((line=br.readLine())!=null) {
            System.out.println(line);
        }
       
    } catch (Exception e) {
        System.out.println(e);
    }
}
}