In this example we shall show you how to write a String as bytes to file with the DataOutputStream. The DataOutputStream lets an application write primitive Java data types to an output stream in a portable way. An application can then use a data input stream to read the data back in. To write a String as bytes to file with the DataOutputStream one should perform the following steps:
- Create a FileOutputStream to write to the file with the specified name.
- Create a DataOutputStream with the FileOutputStream.
- Use
writeBytes(String s)API method. It writes out the string to the underlying output stream as a sequence of bytes,
as described in the code snippet below.
package com.javacodegeeks.snippets.core;
import java.io.DataOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class WriteStringAsBytesToFileWithDataOutputStream {
public static void main(String[] args) {
String filename = "output.txt";
String output = "Java Code Geeks - Java Examples";
FileOutputStream fos = null;
DataOutputStream dos = null;
try {
fos = new FileOutputStream(filename);
dos = new DataOutputStream(fos);
dos.writeBytes(output);
}
catch (FileNotFoundException fnfe) {
System.out.println("File not found" + fnfe);
}
catch (IOException ioe) {
System.out.println("Error while writing to file" + ioe);
}
finally {
try {
if (dos != null) {
dos.close();
}
if (fos != null) {
fos.close();
}
}
catch (Exception e) {
System.out.println("Error while closing streams" + e);
}
}
}
}
This was an example of how to write a String as bytes to file with the DataOutputStream in Java.
