In this tutorial, we will learn about the Java InputStream class and its methods with the help of an example. The InputStream class of the java.io package is an abstract superclass that represents an input stream of bytes.

March 16, 2026 - The read(b, off, len) method for class InputStream simply calls the method read() repeatedly. If the first such call results in an IOException, that exception is returned from the call to the read(b, off, len) method.

The read() method of an InputStream returns an int which contains the byte value of the byte read. Here is an InputStream read() example: ... To read all bytes in a Java InputStream you must keep reading until the value -1 is returned.

The read(b, off, len) method for class InputStream simply calls the method read() repeatedly. If the first such call results in an IOException, that exception is returned from the call to the read(b, off, len) method.

The following example shows the usage of Java InputStream close() method. package com.tutorialspoint; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; public class InputStreamDemo { public static void main(String[] args) { try (InputStream inputStream = new FileInputStream("example.txt")) { int data; while ((data = inputStream.read()) != -1) { // Read character by character System.out.print((char) data); } // No need to manually close, try-with-resources handles it } catch (IOException e) { e.printStackTrace(); } } }

February 21, 2024 - Java InputStream tutorial shows how to work with InputStream class in Java. We work with FileInputStream, ObjectOutputStream, and SequenceInputStream subclasses.

March 28, 2024 - The markSupported method of InputStream returns false by default. Syntax :public boolean markSupported() Parameters : ------- Return : true if input stream supports the mark() and reset() method else,false · Java.io.InputStream.skip(long arg) skips and discards arg bytes in the input stream.

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January 20, 2026 - The read(b, off, len) method for class InputStream simply calls the method read() repeatedly. If the first such call results in an IOException, that exception is returned from the call to the read(b, off, len) method.

The first of the following two diagrams shows the class hierarchy for the input stream classes comprising the java.io package. InputStream inherits from the Object class; six classes inherit directly from InputStream. One of OutputStream's descendents, FilterInputStream, is itself an abstract ...

long bytesSkipped = inputStream.skip(100); // Skip 100 bytes ... Enhance your stream handling skills with practical exercises on LabEx! graph LR A[Input Stream] --> B[Buffered Stream] B --> C[Data Stream] C --> D[Processing] import java.io.*; public class StreamChainingDemo { public static void main(String[] args) { try ( FileInputStream fis = new FileInputStream("/home/labex/data.bin"); BufferedInputStream bis = new BufferedInputStream(fis); DataInputStream dis = new DataInputStream(bis) ) { // Read different data types int intValue = dis.readInt(); double doubleValue = dis.readDouble(); String stringValue = dis.readUTF(); } catch (IOException e) { e.printStackTrace(); } } }

The following example shows the usage of Java InputStream read() method. package com.tutorialspoint; import java.io.FileInputStream; import java.io.InputStream; public class InputStreamDemo { public static void main(String[] args) throws Exception { InputStream is = null; int i; char c; try { // new input stream created is = new FileInputStream("test.txt"); System.out.println("Characters printed:"); // reads till the end of the stream while((i = is.read())!=-1) { // converts integer to character c = (char)i; // prints character System.out.print(c); } } catch(Exception e) { // if any I/O error occurs e.printStackTrace(); } finally { // releases system resources associated with this stream if(is!=null) is.close(); } } }

January 20, 2026 - The read(b, off, len) method for class InputStream simply calls the method read() repeatedly. If the first such call results in an IOException, that exception is returned from the call to the read(b, off, len) method.

January 20, 2026 - The read(b, off, len) method for class InputStream simply calls the method read() repeatedly. If the first such call results in an IOException, that exception is returned from the call to the read(b, off, len) method.

July 23, 2025 - The read() method of InputStream class, reads a byte of data from the input stream. The next byte of data is returned, or -1 if the end of the file is reached and throws an exception if an I/O error occurs.

October 17, 2022 - It is used for reading data in bytes from files and the class used is java.io. It extends the abstract class of the input stream called “InputStream”.To create and use the file input stream, we first need to import the package, java.io.FileI...

January 5, 2024 - In this tutorial, we’ll look at how to convert an InputStream to a String. We’ll start by using plain Java, including Java8/9 solutions, and then look into using the Guava and Apache Commons IO libraries as well.

April 10, 2025 - In this article, you will learn how to load and read files as InputStreams in Java.

In Java, an InputStream is an abstract class representing an input stream of bytes, providing a common interface for reading data from various sources, such as files or network connections.