How to Convert a String to an InputStream in Java?

Converting a String to an InputStream in Java

When working with text data, it can be essential to convert strings into input streams for further processing. In Java, this conversion is straightforward and involves using the ByteArrayInputStream class.

Let's say we have a string stored in a variable named exampleString:

<code class="java">String exampleString = "example";</code>

To convert it to an input stream, you can use the following code:

<code class="java">InputStream stream = new ByteArrayInputStream(exampleString.getBytes(StandardCharsets.UTF_8));</code>

The getBytes() method converts the string into an array of bytes using the UTF-8 encoding, which is the default in Java. The resulting byte array is then used to create an input stream that can be used for reading the data as bytes.

This approach assumes that you want the input stream to contain a sequence of bytes representing the original string encoded as UTF-8.

Note for Java Versions Less Than 7

For versions of Java prior to 7, where the StandardCharsets class is not available, you can use the following code instead:

<code class="java">InputStream stream = new ByteArrayInputStream(exampleString.getBytes("UTF-8"));</code>

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