Java by API/java.io/FileOutputStream

FileOutputStream: getChannel()

   <source lang="java">

import java.io.FileInputStream; import java.io.FileOutputStream; import java.nio.ByteBuffer; import java.nio.channels.FileChannel; public class Main {

 private static final int BSIZE = 1024;
 public static void main(String[] args) throws Exception {
   FileChannel in = new FileInputStream("source.txt").getChannel(), out = new FileOutputStream(
       "target.txt").getChannel();
   ByteBuffer buffer = ByteBuffer.allocate(BSIZE);
   while (in.read(buffer) != -1) {
     buffer.flip();
     out.write(buffer);
     buffer.clear();
   }
 }

}

 </source>
   
  
 
  

FileOutputStream: getFD()

   <source lang="java">

import java.io.FileDescriptor; import java.io.FileOutputStream; public class Main {

 public static void main(String[] argv) throws Exception {
   FileOutputStream os = new FileOutputStream("outfilename");
   FileDescriptor fd = os.getFD();
   os.write(1);
   os.flush();
   fd.sync();
 }

}

 </source>
   
  
 
  

FileOutputStream: write(int b)

   <source lang="java">
 

import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.InflaterInputStream; public class Main {

 public static void main(String[] args) {
   for (int i = 0; i < args.length; i++) {
     if (args[i].toLowerCase().endsWith(".dfl")) {
       try {
         FileInputStream fin = new FileInputStream(args[i]);
         InflaterInputStream iis = new InflaterInputStream(fin);
         FileOutputStream fout = new FileOutputStream(args[i].substring(0, args[i].length() - 4));
         for (int c = iis.read(); c != -1; c = iis.read()) {
           fout.write(c);
         }
         fout.close();
       } catch (IOException ex) {
         System.err.println(ex);
       }
     } else {
       System.err.println(args[i] + " does not appear to be a deflated file.");
     }
   }
 }

}

 </source>
   
  
 
  

new FileOutputStream(File file)

   <source lang="java">
 

import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.PrintStream; public class MainClass {

 public static void main(String[] args) {
   try {
     File tempFile = File.createTempFile("myfile", ".tmp");
     FileOutputStream fout = new FileOutputStream(tempFile);
     PrintStream out = new PrintStream(fout);
     out.println("some text");
   } catch (IOException ex) {
     System.out.println("There was a problem creating/writing to the temp file");
     ex.printStackTrace();
   }
 }

}

 </source>
   
  
 
  

new FileOutputStream(String name)

   <source lang="java">
 

/*

* Output:
* 
* 
* 
*  
*/

import java.io.*; public class MainClass {

 public static void main(String args[]) throws Exception {
   byte buf[] = new byte[]{66,67,68,69};
   OutputStream f0 = new FileOutputStream("file1.txt");
   OutputStream f1 = new FileOutputStream("file2.txt");
   OutputStream f2 = new FileOutputStream("file3.txt");
   for (int i = 0; i < buf.length; i++) {
     f0.write(buf[i]);
   }
   f0.close();
   f1.write(buf);
   f1.close();
   f2.write(buf, buf.length / 4, buf.length / 2);
   f2.close();
 }

}

 </source>