The Java DataOutputStream class enables a program to write primitive Java data types to the output stream in a manner that is independent of the underlying machine.
In Java programming, data output stream is commonly employed to store data that can be retrieved later by a data input stream.
Java DataOutputStream class declaration
Now, let's examine the declaration of the java.io.DataOutputStream class:
Example
public class DataOutputStream extends FilterOutputStream implements DataOutput
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 writestringto 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 instance, we are demonstrating how to use the DataOutputStream class to write data to a text file named testout.txt.
Example
package com.example;
import java.io.*;
public class OutputExample {
public static void main(String[] args) throws IOException {
FileOutputStream file = new FileOutputStream(D:\\testout.txt);
DataOutputStream data = new DataOutputStream(file);
data.writeInt(65);
data.flush();
data.close();
System.out.println("Succcess...");
}
}
Output:
Output
Succcess...
testout.txt:
