Everything needs to have enough space, otherwise this will fail. The bytes read by read() method are returned as int. I believe it also depends on the IO load on the computer as well. A BufferedInputStream adds functionality to another input stream-namely, the ability to buffer the input and to support the mark and reset methods. Types of Stream Stream is basically divided into following types based on data flow direction. 2.1. read() : Java.io.InputStream.read(byte[] arg) reads number of bytes of arg.length from the input stream to the buffer array arg. Streams des Interface java.util.stream.Stream, nicht zu verwechseln mit den Ein- und Ausgabe-Streams des Packages java.io, stellen Ströme von Referenzen dar, die es erlauben, verkettete Operationen auf diesen Referenzen nacheinander oder parallel auszuführen.Die Daten, die durch die Referenzen repräsentiert werden, werden durch den Stream selbst nicht verändert. If len is zero, then no bytes are read and 0 is returned; otherwise, there is an attempt to read at least one byte. Right and your example will only work if everything just happens to line up: The file system, kernel buffers, the disk cache, the bus, the paging, Java buffers, etc. When the BufferedInputStream is created, an internal buffer array is created. In Java, stream is basically a sequence of bytes, which has a continuous flow between Java programs and data storage. Input and Output I want to read the content of a InputStream into a String: private String readToString(InputStream stream) { return new BufferedReader(new InputStreamReader(stream)) .lines().collect This is usually the case for small files, but not always. Starting Java 1.4, we also have Java NIO packaged in the namespace java.nio which enables non-blocking input and output operations. - How to convert String to InputStream in Java. As bytes from the stream are read or skipped, the internal buffer is refilled as necessary from the contained input stream, many bytes at a time. Stream is the logical connection between Java program and file.
Pure Java – ByteArrayOutputStream InputStream result = new ByteArrayInputStream(anyString.getBytes(StandardCharsets.UTF_8)); Details related to Java IO and Java NIO can be found here.

1. The InputStream class of the java.io package is an abstract superclass that represents an input stream … In Java, we can use ByteArrayInputStream or IOUtils to convert a String into an InputStream. b - the buffer into which the data is read off - the start offset in the destination array b len - the maximum number of bytes read Returns: the actual number of bytes read, or -1 if the end of the entry is reached Throws: NullPointerException - if b is null. In this tutorial, we will learn about the Java InputStream class and its methods with the help of an example. Our focus area for this article, however, is ObjectStream as part of Java IO. Input Stream Input stream is represented as an input source.