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Java DataOutputStream Class
Java DataOutputStream class allows an application to write primitive Java data types to the output stream in a machine-independent way.
Java application generally uses the data output stream to write data that can later be read by a data input stream.
Java DataOutputStream class declaration
Let’s see the declaration for java.io.DataOutputStream class:
Java DataOutputStream class methods
| Method | Description |
|---|---|
| int size() | It is used to return the number of bytes written to the data output stream. |
| void write(int b) | It is used to write the specified byte to the underlying output stream. |
| void write(byte[] b, int off, int len) | It is used to write len bytes of data to the output stream. |
| void writeBoolean(boolean v) | It is used to write Boolean to the output stream as a 1-byte value. |
| void writeChar(int v) | It is used to write char to the output stream as a 2-byte value. |
| void writeChars(String s) | It is used to write string to the output stream as a sequence of characters. |
| void writeByte(int v) | It is used to write a byte to the output stream as a 1-byte value. |
| void writeBytes(String s) | It is used to write string to the output stream as a sequence of bytes. |
| void writeInt(int v) | It is used to write an int to the output stream |
| void writeShort(int v) | It is used to write a short to the output stream. |
| void writeShort(int v) | It is used to write a short to the output stream. |
| void writeLong(long v) | It is used to write a long to the output stream. |
| void writeUTF(String str) | It is used to write a string to the output stream using UTF-8 encoding in portable manner. |
| void flush() | It is used to flushes the data output stream. |
Example of DataOutputStream class
In this example, we are writing the data to a text file testout.txt using DataOutputStream class.
Output:
Succcess...
testout.txt:
A
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