How do you get InputStream from a string?

How do you get InputStream from a string?

Approach:

  1. Get the bytes of the String.
  2. Create a new ByteArrayInputStream using the bytes of the String.
  3. Assign the ByteArrayInputStream object to an InputStream variable.
  4. Buffer contains bytes that read from the stream.
  5. Print the InputStream.

Can we convert string to InputStream in java?

We can convert a String to an InputStream object by using the ByteArrayInputStream class. This class constructor takes the string byte array which can be done by calling the getBytes() method of a String class.

What does InputStream do in java?

1.1 InputStream: InputStream is an abstract class of Byte Stream that describe stream input and it is used for reading and it could be a file, image, audio, video, webpage, etc. it doesn’t matter. Thus, InputStream read data from source one item at a time.

What does the read () method of InputStream return when an attempt is made to read at the end of the stream?

read. Reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255 . If no byte is available because the end of the stream has been reached, the value -1 is returned.

How do I create an empty InputStream?

Empty InputStream

  1. // Since InputStream has only one abstract method,
  2. // it is easy to create an empty stream by an anonymous subclass.
  3. InputStream empty = new InputStream() {
  4. @Override.
  5. public int read() {
  6. return -1; // end of stream.
  7. }
  8. };

How do you add data to InputStream?

Show activity on this post.

  1. Create a new OutputStream , backed by a byte array as Greg suggested..
  2. Write the beginning characters to your new OutputStream .
  3. Copy your existing InputStream to your new OutputStream .
  4. Write the ending characters to your new OutputStream .

How do I initiate InputStream?

InputStream inFile = new FileInptStream(); // This yeilds an eror because there are no arguments….

  1. Great this did the trick.
  2. use while (inFile == null) condition to be sure the file is opened successfully.
  3. don’t forget to close the stream in a finally block!

How does InputStream read work?

The read() method returns an int that stores the next byte that is read from the stream. You need to cast it to a char , or otherwise the int value will be printed. If you type “ABCD”, then without casting, then the println(int) method is called ( System. out is a PrintStream ), and the values of the bytes are printed.

How does InputStream read () method work?

read() method reads the next byte of the data from the the input stream and returns int in the range of 0 to 255. If no byte is available because the end of the stream has been reached, the returned value is -1.

What is InputStream class in java?

The Java. io. InputStream class is the superclass of all classes representing an input stream of bytes. Applications that need to define a subclass of InputStream must always provide a method that returns the next byte of input.