{"id":9406,"date":"2014-04-14T14:20:45","date_gmt":"2014-04-14T11:20:45","guid":{"rendered":"http:\/\/examples.javacodegeeks.com\/?p=9406"},"modified":"2020-12-04T12:26:53","modified_gmt":"2020-12-04T10:26:53","slug":"java-io-fileinputstream-example","status":"publish","type":"post","link":"https:\/\/examples.javacodegeeks.com\/java-io-fileinputstream-java-fileinputstream-example\/","title":{"rendered":"java.io.FileInputStream – Java FileInputStream Example"},"content":{"rendered":"

In this example, we are going to see how to use FileInputStream in Java and inputstream. FileInputStream<\/code> in an InputStream<\/a><\/code> subclass that is used to read data from files in a file system. <\/p>\n

It is actually connected to a specific file and can be used to extract data from them and make them available inside your program for manipulation. As with InputStream<\/code>, a FileInputStream<\/code> is responsible for reading raw bytes from a source (in this case a file). If you want to read a text file in character format you have to wrap the FileInputStream<\/code> around a suitable Reader<\/code> class.<\/p>\n

1. Reading bytes from a file<\/h2>\n

Let’s see how you can obtain a FileInputStream<\/code> and read bytes from a file.<\/p>\n

1.1 Read a single byte<\/h3>\n

You can use read()<\/code> method of FileInputStream<\/code> to read a single byte form the file. read()<\/code> will return the byte in the form of a decimal integer with valu 0-255: <\/p>\n

FileInputStreamExample.java<\/span><\/em><\/p>\n

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package<\/code> com.javacodegeeks.core.io.inputstream;<\/code><\/div>\n
 <\/div>\n
import<\/code> java.io.FileInputStream;<\/code><\/div>\n
import<\/code> java.io.FileNotFoundException;<\/code><\/div>\n
import<\/code> java.io.IOException;<\/code><\/div>\n
import<\/code> java.io.InputStream;<\/code><\/div>\n
 <\/div>\n
public<\/code> class<\/code> FileInputStreamExample {<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> final<\/code> String INPUT_FILE=<\/code>\"F:\\\\nikos7\\\\Desktop\\\\testFiles\\\\textFile.txt\"<\/code>;<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> void<\/code> main(String[] args){<\/code><\/div>\n
 <\/div>\n
        <\/code>try<\/code> ( InputStream inputStream = <\/code>new<\/code> FileInputStream(INPUT_FILE) ) {<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Available bytes from the file :\"<\/code>+inputStream.available());<\/code><\/div>\n
 <\/div>\n
            <\/code>\/\/ read a single byte<\/code><\/div>\n
            <\/code>int<\/code> b = inputStream.read();<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Read byte : +\"<\/code>+b);<\/code><\/div>\n
 <\/div>\n
        <\/code>} <\/code>catch<\/code> (FileNotFoundException e) {<\/code><\/div>\n
            <\/code>e.printStackTrace();<\/code><\/div>\n
        <\/code>} <\/code>catch<\/code> (IOException e1) {<\/code><\/div>\n
            <\/code>e1.printStackTrace();<\/code><\/div>\n
        <\/code>}<\/code><\/div>\n
    <\/code>}   <\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

This will output<\/strong>:<\/p>\n

Available bytes from the file :183500798\nRead byte :111<\/pre>\n
As you can see, we’ve also demonstrated available() method. This method will return an estimate of how many bytes are available for the next reading method to read without blocking.<\/p>\n
1.2 Read a sequence of bytes<\/h3>\n
Naturally reading a file byte by byte is a bit of a pain. That’s why you can use int read(byte[] buff)<\/code> and int read(byte[] buff,int off, int len)<\/code> methods to read a sequence of bytes from the file and store them in a byte array. <\/p>\n
FileInputStreamExample.java<\/span><\/em><\/p>\n
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package<\/code> com.javacodegeeks.core.io.inputstream;<\/code><\/div>\n
 <\/div>\n
import<\/code> java.io.FileInputStream;<\/code><\/div>\n
import<\/code> java.io.FileNotFoundException;<\/code><\/div>\n
import<\/code> java.io.IOException;<\/code><\/div>\n
import<\/code> java.io.InputStream;<\/code><\/div>\n
import<\/code> java.util.Arrays;<\/code><\/div>\n
 <\/div>\n
public<\/code> class<\/code> FileInputStreamExample {<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> final<\/code> String INPUT_FILE=<\/code>\"F:\\\\nikos7\\\\Desktop\\\\testFiles\\\\textFile.txt\"<\/code>;<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> void<\/code> main(String[] args){<\/code><\/div>\n
 <\/div>\n
        <\/code>byte<\/code>[] bytes = <\/code>new<\/code> byte<\/code>[<\/code>100<\/code>];<\/code><\/div>\n
 <\/div>\n
        <\/code>try<\/code> ( InputStream inputStream = <\/code>new<\/code> FileInputStream(INPUT_FILE) ) {<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Available bytes from the file :\"<\/code>+inputStream.available());<\/code><\/div>\n
 <\/div>\n
            <\/code>int<\/code> bytesread = inputStream.read(bytes);<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Read bytes :\"<\/code>+bytesread);<\/code><\/div>\n
            <\/code>System.out.println(Arrays.toString(bytes));<\/code><\/div>\n
 <\/div>\n
        <\/code>} <\/code>catch<\/code> (FileNotFoundException e) {<\/code><\/div>\n
            <\/code>e.printStackTrace();<\/code><\/div>\n
        <\/code>} <\/code>catch<\/code> (IOException e1) {<\/code><\/div>\n
            <\/code>e1.printStackTrace();<\/code><\/div>\n
        <\/code>}<\/code><\/div>\n
    <\/code>}<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
This will output<\/strong>:<\/p>\n
Available bytes from the file :183500798\nRead bytes :100\n[111, 112, 97, 112, 111, 115, 106, 99, 100, 111, 97, 115, 100, 118, 111, 112, 97, 115, 100, 118, 13, 10, 97, 115, 100, 118, 111, 112, 97, 115, 111, 100, 106, 118, 111, 112, 106, 97, 112, 115, 111, 118, 91, 97, 115, 100, 118, 13, 10, 112, 111, 97, 115, 100, 118, 112, 111, 106, 97, 115, 100, 118, 91, 97, 115, 107, 100, 118, 91, 112, 107, 91, 13, 10, 115, 97, 100, 118, 112, 115, 111, 106, 100, 118, 111, 106, 115, 112, 111, 100, 118, 106, 13, 10, 115, 100, 118, 111, 106, 112]\n<\/pre>\n
In this case, I’ve read a sequence of 100 bytes and stored them in a byte array. int read(byte[] buff)<\/code> will attempt to read 100 bytes, the size of the array. But it is not guaranteed that it will certainly ready 100 bytes. That why the actual number of bytes it has read is returned as an integer. Let’s see how you can use int read(byte[] buff,int off, int len)<\/code> to read a sequence of bytes and store them in an array of bytes. Here you can specify an offset that you want your bytes to be copied to, instead of just filling up your buffer from the beginning.<\/p>\n
FileInputStreamExample.java<\/span><\/em><\/p>\n
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package<\/code> com.javacodegeeks.core.io.inputstream;<\/code><\/div>\n
 <\/div>\n
import<\/code> java.io.FileInputStream;<\/code><\/div>\n
import<\/code> java.io.FileNotFoundException;<\/code><\/div>\n
import<\/code> java.io.IOException;<\/code><\/div>\n
import<\/code> java.io.InputStream;<\/code><\/div>\n
import<\/code> java.util.Arrays;<\/code><\/div>\n
 <\/div>\n
public<\/code> class<\/code> FileInputStreamExample {<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> final<\/code> String INPUT_FILE=<\/code>\"F:\\\\nikos7\\\\Desktop\\\\testFiles\\\\textFile.txt\"<\/code>;<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> void<\/code> main(String[] args){<\/code><\/div>\n
 <\/div>\n
        <\/code>byte<\/code>[] bytes = <\/code>new<\/code> byte<\/code>[<\/code>100<\/code>];<\/code><\/div>\n
 <\/div>\n
        <\/code>try<\/code> ( InputStream inputStream = <\/code>new<\/code> FileInputStream(INPUT_FILE) ) {<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Available bytes from the file :\"<\/code>+inputStream.available());<\/code><\/div>\n
 <\/div>\n
            <\/code>int<\/code> bytesread = inputStream.read(bytes,<\/code>10<\/code>,<\/code>20<\/code>);<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Read bytes :\"<\/code>+bytesread);<\/code><\/div>\n
            <\/code>System.out.println(Arrays.toString(bytes));<\/code><\/div>\n
 <\/div>\n
        <\/code>} <\/code>catch<\/code> (FileNotFoundException e) {<\/code><\/div>\n
            <\/code>e.printStackTrace();<\/code><\/div>\n
        <\/code>} <\/code>catch<\/code> (IOException e1) {<\/code><\/div>\n
            <\/code>e1.printStackTrace();<\/code><\/div>\n
        <\/code>}<\/code><\/div>\n
    <\/code>}<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
This will output<\/strong>:
 
<\/div> <\/div><\/p>\n
Available bytes from the file :183500798\nRead bytes :20\n[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 111, 112, 97, 112, 111, 115, 106, 99, 100, 111, 97, 115, 100, 118, 111, 112, 97, 115, 100, 118, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]\n<\/pre>\n
You can also choose how many bytes you want to read. In the above example, I’ve chosen to read 20 bytes and I want them to be stored from the bytes[10] position of my array and so forth.<\/p>\n
1.3 Buffering a FileInputStream<\/h3>\n
If your application is very I\/O intensive and it intends to read large amounts of data from large files, then it’s highly advised to buffer the FileInputStream<\/code>. For that, you can use a BufferedInputStream<\/a><\/code>. This will automatically create an internal buffer and perform as less I\/O operations as possible. You can also choose the internal buffer size. <\/p>\n
Using a BufferedInputStream<\/code> is no different from using a FileInputStream<\/code>, or in fact, an InputStream<\/code>, but it adds that extra internal buffering that can make a difference in performance in many applications. Let’s see how you can use it: <\/p>\n
FileInputStreamExample.java<\/em><\/span><\/p>\n
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package<\/code> com.javacodegeeks.core.io.inputstream;<\/code><\/div>\n
 <\/div>\n
import<\/code> java.io.BufferedInputStream;<\/code><\/div>\n
import<\/code> java.io.FileInputStream;<\/code><\/div>\n
import<\/code> java.io.FileNotFoundException;<\/code><\/div>\n
import<\/code> java.io.IOException;<\/code><\/div>\n
import<\/code> java.io.InputStream;<\/code><\/div>\n
import<\/code> java.util.Arrays;<\/code><\/div>\n
 <\/div>\n
public<\/code> class<\/code> FileInputStreamExample {<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> final<\/code> String INPUT_FILE=<\/code>\"F:\\\\nikos7\\\\Desktop\\\\testFiles\\\\textFile.txt\"<\/code>;<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> void<\/code> main(String[] args){<\/code><\/div>\n
 <\/div>\n
        <\/code>byte<\/code>[] bytes = <\/code>new<\/code> byte<\/code>[<\/code>100<\/code>];<\/code><\/div>\n
 <\/div>\n
        <\/code>try<\/code> ( InputStream inputStream = <\/code>new<\/code> BufferedInputStream (<\/code>new<\/code> FileInputStream(INPUT_FILE),<\/code>1024<\/code>) ) {<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Available bytes from the file :\"<\/code>+inputStream.available());<\/code><\/div>\n
 <\/div>\n
            <\/code>int<\/code> bytesread = inputStream.read(bytes,<\/code>10<\/code>,<\/code>20<\/code>);<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Read bytes :\"<\/code>+bytesread);<\/code><\/div>\n
            <\/code>System.out.println(Arrays.toString(bytes));<\/code><\/div>\n
 <\/div>\n
        <\/code>} <\/code>catch<\/code> (FileNotFoundException e) {<\/code><\/div>\n
            <\/code>e.printStackTrace();<\/code><\/div>\n
        <\/code>} <\/code>catch<\/code> (IOException e1) {<\/code><\/div>\n
            <\/code>e1.printStackTrace();<\/code><\/div>\n
        <\/code>}<\/code><\/div>\n
    <\/code>}<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
This will output<\/strong>:<\/p>\n
Available bytes from the file :183500798\nRead bytes :20\n[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 111, 112, 97, 112, 111, 115, 106, 99, 100, 111, 97, 115, 100, 118, 111, 112, 97, 115, 100, 118, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]\n<\/pre>\n
You can see that there is no difference in the way you use BufferedInputStream<\/code>.I’ve also specified the size of the internal buffer to be 1024 bytes in the constructor of BufferedInputStream<\/code>.<\/p>\n
2. Reading characters from a file<\/h2>\n
When dealing with binary files, reading bytes is normally fine. But is not very convenient when you read text files. That’s why Java offers special Reader classes that wrap around a byte stream and convert it to a character stream. You can also specify the character set encoding that you want. In our case, we are going to use an java inputstream . <\/p>\n
Let’s see how you can use it to read characters from a file. <\/p>\n
FileInputStreamExample.java<\/em><\/span><\/p>\n
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package<\/code> com.javacodegeeks.core.io.inputstream;<\/code><\/div>\n
 <\/div>\n
import<\/code> java.io.FileInputStream;<\/code><\/div>\n
import<\/code> java.io.FileNotFoundException;<\/code><\/div>\n
import<\/code> java.io.IOException;<\/code><\/div>\n
import<\/code> java.io.InputStreamReader;<\/code><\/div>\n
import<\/code> java.util.Arrays;<\/code><\/div>\n
 <\/div>\n
public<\/code> class<\/code> FileInputStreamExample {<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> final<\/code> String INPUT_FILE=<\/code>\"F:\\\\nikos7\\\\Desktop\\\\testFiles\\\\textFile.txt\"<\/code>;<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> void<\/code> main(String[] args){<\/code><\/div>\n
 <\/div>\n
        <\/code>char<\/code>[] chars = <\/code>new<\/code> char<\/code>[<\/code>50<\/code>];<\/code><\/div>\n
 <\/div>\n
        <\/code>try<\/code> ( InputStreamReader inputStreamReader = <\/code>new<\/code> InputStreamReader (<\/code>new<\/code> FileInputStream(INPUT_FILE)) ) {<\/code><\/div>\n
 <\/div>\n
            <\/code>int<\/code> charsread = inputStreamReader.read(chars,<\/code>0<\/code>,<\/code>20<\/code>);<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Read characters :\"<\/code>+charsread);<\/code><\/div>\n
            <\/code>System.out.println(Arrays.toString(chars));<\/code><\/div>\n
 <\/div>\n
        <\/code>} <\/code>catch<\/code> (FileNotFoundException e) {<\/code><\/div>\n
            <\/code>e.printStackTrace();<\/code><\/div>\n
        <\/code>} <\/code>catch<\/code> (IOException e1) {<\/code><\/div>\n
            <\/code>e1.printStackTrace();<\/code><\/div>\n
        <\/code>}<\/code><\/div>\n
    <\/code>}<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
This will output<\/strong>:<\/p>\n
Read characters :20\n<\/pre>\n
[o, p, a, p, o, s, j, c, d, o, a, s, d, v, o, p, a, s, d, v, , , , , , , , , , , , , , , , , , ]<\/code><\/p>\n
Java offers a convenient FileReader<\/a><\/code> class that opens up a character stream directly without having to create a FileInputStream<\/code> and then an InputStreamReader<\/code>. Of course, you can also buffer an java inputstream using an BufferedReader<\/code>. BufferedReader<\/code> offers a very convenient readLine method that enables to read character streams line by line. Let’s see how: <\/p>\n<\/p>\n
FileInputStreamExample.java<\/em><\/span><\/p>\n
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package<\/code> com.javacodegeeks.core.io.inputstream;<\/code><\/div>\n
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import<\/code> java.io.BufferedReader;<\/code><\/div>\n
import<\/code> java.io.FileInputStream;<\/code><\/div>\n
import<\/code> java.io.FileNotFoundException;<\/code><\/div>\n
import<\/code> java.io.IOException;<\/code><\/div>\n
import<\/code> java.io.InputStreamReader;<\/code><\/div>\n
 <\/div>\n
public<\/code> class<\/code> FileInputStreamExample {<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> final<\/code> String INPUT_FILE=<\/code>\"F:\\\\nikos7\\\\Desktop\\\\testFiles\\\\textFile.txt\"<\/code>;<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> void<\/code> main(String[] args){<\/code><\/div>\n
 <\/div>\n
        <\/code>String line=<\/code>\"\"<\/code>;<\/code><\/div>\n
 <\/div>\n
        <\/code>try<\/code> ( BufferedReader bufferedReader = <\/code>new<\/code> BufferedReader (<\/code>new<\/code>  InputStreamReader (<\/code>new<\/code> FileInputStream(INPUT_FILE))) ) {<\/code><\/div>\n
 <\/div>\n
            <\/code>while<\/code>  ( ( line =bufferedReader.readLine()) !=<\/code>null<\/code> ){<\/code><\/div>\n
                <\/code>System.out.println(line);<\/code><\/div>\n
            <\/code>}<\/code><\/div>\n
 <\/div>\n
        <\/code>} <\/code>catch<\/code> (FileNotFoundException e) {<\/code><\/div>\n
            <\/code>e.printStackTrace();<\/code><\/div>\n
        <\/code>} <\/code>catch<\/code> (IOException e1) {<\/code><\/div>\n
            <\/code>e1.printStackTrace();<\/code><\/div>\n
        <\/code>}<\/code><\/div>\n
    <\/code>}<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
This will output<\/strong>:<\/p>\n
sdvojpojvpaosjdpvjpoasjdv\nasjdvojpaosjdpvjpaosjdvasdv\naosdbfpjaosjdobjaspodbj\nopaposjcdoasdvopasdv\nasdvopasodjvopjapsov[asdv\npoasdvpojasdv[askdv[pk[\nsadvpsojdvojspodvj\nsdvojpojvpaosjdpvjpoasjdv\nasjdvojpaosjdpvjpaosjdvasdv\naosdbfpjaosjdobjaspodbj\n...\n<\/pre>\n
3. FileInputStream and NIO<\/h2>\n
You can also use the Files<\/a><\/code> NIO class to obtain a FileInputStream<\/code>. <\/p>\n
F<\/em><\/span>ileInputStreamExample.java<\/em><\/p>\n
\n
\n\n\n\n
\n
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\n
\n
package<\/code> com.javacodegeeks.core.io.inputstream;<\/code><\/div>\n
 <\/div>\n
import<\/code> java.io.FileNotFoundException;<\/code><\/div>\n
import<\/code> java.io.IOException;<\/code><\/div>\n
import<\/code> java.io.InputStream;<\/code><\/div>\n
import<\/code> java.nio.file.Files;<\/code><\/div>\n
import<\/code> java.nio.file.Path;<\/code><\/div>\n
import<\/code> java.nio.file.Paths;<\/code><\/div>\n
import<\/code> java.util.Arrays;<\/code><\/div>\n
 <\/div>\n
public<\/code> class<\/code> FileInputStreamExample {<\/code><\/div>\n
 <\/div>\n
public<\/code> static<\/code> final<\/code> String INPUT_FILE=<\/code>\"F:\\\\nikos7\\\\Desktop\\\\testFiles\\\\textFile.txt\"<\/code>;<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> void<\/code> main(String[] args){<\/code><\/div>\n
 <\/div>\n
        <\/code>Path filePath = Paths.get(INPUT_FILE);<\/code><\/div>\n
 <\/div>\n
        <\/code>byte<\/code>[] bytes = <\/code>new<\/code> byte<\/code>[<\/code>100<\/code>];<\/code><\/div>\n
 <\/div>\n
        <\/code>try<\/code> ( InputStream inputStream = Files.newInputStream(filePath) ) {<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Available bytes from the file :\"<\/code>+inputStream.available());<\/code><\/div>\n
 <\/div>\n
            <\/code>int<\/code> bytesread = inputStream.read(bytes,<\/code>10<\/code>,<\/code>20<\/code>);<\/code><\/div>\n
 <\/div>\n
            <\/code>System.out.println(<\/code>\"Read bytes :\"<\/code>+bytesread);<\/code><\/div>\n
            <\/code>System.out.println(Arrays.toString(bytes));<\/code><\/div>\n
 <\/div>\n
        <\/code>} <\/code>catch<\/code> (FileNotFoundException e) {<\/code><\/div>\n
            <\/code>e.printStackTrace();<\/code><\/div>\n
        <\/code>} <\/code>catch<\/code> (IOException e1) {<\/code><\/div>\n
            <\/code>e1.printStackTrace();<\/code><\/div>\n
        <\/code>}<\/code><\/div>\n
    <\/code>}<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
This will output<\/strong>:<\/p>\n
Available bytes from the file :183500798\nRead bytes :20\n[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 111, 112, 97, 112, 111, 115, 106, 99, 100, 111, 97, 115, 100, 118, 111, 112, 97, 115, 100, 118, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]\n<\/pre>\n
Or you can obtain directly a BufferedReader<\/code>: <\/p>\n
FileInputStreamExample.java<\/em><\/span><\/p>\n
\n
\n\n\n\n
\n
01<\/div>\n
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33<\/div>\n<\/td>\n
\n
\n
package<\/code> com.javacodegeeks.core.io.inputstream;<\/code><\/div>\n
 <\/div>\n
import<\/code> java.io.BufferedReader;<\/code><\/div>\n
import<\/code> java.io.FileNotFoundException;<\/code><\/div>\n
import<\/code> java.io.IOException;<\/code><\/div>\n
import<\/code> java.nio.charset.Charset;<\/code><\/div>\n
import<\/code> java.nio.file.Files;<\/code><\/div>\n
import<\/code> java.nio.file.Path;<\/code><\/div>\n
import<\/code> java.nio.file.Paths;<\/code><\/div>\n
 <\/div>\n
public<\/code> class<\/code> FileInputStreamExample {<\/code><\/div>\n
 <\/div>\n
public<\/code> static<\/code> final<\/code> String INPUT_FILE=<\/code>\"F:\\\\nikos7\\\\Desktop\\\\testFiles\\\\textFile.txt\"<\/code>;<\/code><\/div>\n
 <\/div>\n
    <\/code>public<\/code> static<\/code> void<\/code> main(String[] args){<\/code><\/div>\n
 <\/div>\n
        <\/code>Path filePath = Paths.get(INPUT_FILE);<\/code><\/div>\n
 <\/div>\n
        <\/code>String line =<\/code>\"\"<\/code>;<\/code><\/div>\n
 <\/div>\n
        <\/code>try<\/code> ( BufferedReader bufferedReader = Files.newBufferedReader(filePath,Charset.defaultCharset()) ) {<\/code><\/div>\n
 <\/div>\n
            <\/code>while<\/code>  ( ( line =bufferedReader.readLine()) !=<\/code>null<\/code> ){<\/code><\/div>\n
                <\/code>System.out.println(line);<\/code><\/div>\n
            <\/code>}<\/code><\/div>\n
 <\/div>\n
        <\/code>} <\/code>catch<\/code> (FileNotFoundException e) {<\/code><\/div>\n
            <\/code>e.printStackTrace();<\/code><\/div>\n
        <\/code>} <\/code>catch<\/code> (IOException e1) {<\/code><\/div>\n
            <\/code>e1.printStackTrace();<\/code><\/div>\n
        <\/code>}<\/code><\/div>\n
    <\/code>}<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
This will output<\/strong>:<\/p>\n
sdvojpojvpaosjdpvjpoasjdv\nasjdvojpaosjdpvjpaosjdvasdv\naosdbfpjaosjdobjaspodbj\nopaposjcdoasdvopasdv\nasdvopasodjvopjapsov[asdv\npoasdvpojasdv[askdv[pk[\nsadvpsojdvojspodvj\nsdvojpojvpaosjdpvjpoasjdv\nasjdvojpaosjdpvjpaosjdvasdv\naosdbfpjaosjdobjaspodbj\n...\n<\/pre>\n
4. Download the source code<\/h2>\n
This was a Java FileInputStream Example and inputstream. <\/p>\n
Download<\/strong>
\nYou can download the source code of this example here: java.io.FileInputStream – Java FileInputStream Example<\/strong><\/a><\/div>\n
Last updated on May 19th, 2020<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"
In this example, we are going to see how to use FileInputStream in Java and inputstream. FileInputStream in an InputStream subclass that is used to read data from files in a file system. It is actually connected to a specific file and can be used to extract data from them and make them available inside …<\/p>\n","protected":false},"author":4,"featured_media":1204,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[176,180,1128,211,1138,1043],"class_list":["post-9406","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fileinputstream","tag-arrays-2","tag-bufferedinputstream-2","tag-bufferedreader","tag-inputstream-2","tag-inputstreamreader","tag-nio"],"yoast_head":"\nJava FileInputStream Example - Examples Java Code Geeks - 2026<\/title>\n<meta name=\"description\" content=\"In this example, we are going to see how to use FileInputStream in Java and inputstream. 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