• PipedInputStream je prav tako povezan s PipedOutputStream. Podatke je torej mogoče zapisati s PipedOutputStream in PipedInputStream. Toda uporaba obeh niti hkrati povzroči zastoj za niti.
• Cev naj bi bila prekinjena, če nit, ki je zagotavljala podatkovne bajte povezanemu cevnemu izhodnemu toku, ni več živa.

public class PipedInputStream extends InputStream 

PipedInputStream(): ustvari PipedInputStream, ki ni povezan. PipedInputStream(int pSize): ustvari PipedInputStream, ki ni povezan z določeno velikostjo cevi. PipedInputStream(PipedOutputStream outStream) : ustvari PipedInputStream, ki je povezan s PipedOutputStream - 'outStream'. PipedInputStream(PipedOutputStream outStream int pSize) : ustvari cevovodni vhodni tok, ki je povezan s cevovodnim izhodnim tokom z določeno velikostjo cevi.

int read(): Reads the next byte of data from this piped input stream.The value byte is returned as an int in the range 0 to 255. This method blocks until input data is available the end of the stream is detected or an exception is thrown. Java

   // Java program illustrating the working of read() method   import     java.io.*  ;   public     class   NewClass   {      public     static     void     main  (  String  []     args  )     throws     IOException      {      PipedInputStream     geek_input     =     new     PipedInputStream  ();      PipedOutputStream     geek_output     =     new     PipedOutputStream  ();      try      {      // Use of connect() : connecting geek_input with geek_output      geek_input  .  connect  (  geek_output  );      // Use of read() method :      geek_output  .  write  (  71  );      System  .  out  .  println  (  'using read() : '     +     (  char  )  geek_input  .  read  ());      geek_output  .  write  (  69  );      System  .  out  .  println  (  'using read() : '     +     (  char  )  geek_input  .  read  ());      geek_output  .  write  (  75  );      System  .  out  .  println  (  'using read() : '     +     (  char  )  geek_input  .  read  ());      }      catch     (  IOException     except  )      {      except  .  printStackTrace  ();      }      }   }   

Izhod:

using read() : G using read() : E using read() : K 

read(byte[] buffer int offset int maxlen) : java.io.PipedInputStream.read(byte[] buffer int offset int maxlen) prebere do maxlen bajtov podatkov iz cevovodnega vhodnega toka v polje vmesnih pomnilnikov. Metoda se blokira, če je dosežen konec toka ali vržena izjema. Sintaksa:

public int read(byte[] buffer int offset int maxlen)   Parameters :    buffer : the destination buffer into which the data is to be read offset : starting in the destination array - 'buffer'. maxlen : maximum length of array to be read   Return :    next 'maxlen' bytes of the data as an integer value return -1 is end of stream is reached   Exception :   ->   IOException :   if in case IO error occurs. ->   NullPointerException :   if buffer is null. ->   IndexOutOfBoundsException :   if offset is -ve or maxlen is -ve or maxlen > buffer.length - offset.  

sprejem (int bajt): java.io.PipedInputStream.receive(int byte) prejme bajt podatkov. Če vnos ni na voljo, se metoda blokira. Sintaksa:

protected void receive(int byte)   Parameters :    byte : the bytes of the data received   Return :    void   Exception :   ->   IOException :   if in case IO error occurs or pipe is broken. 

zapri(): java.io.PipedInputStream.close() zapre cevni vhodni tok in sprosti dodeljena sredstva. Sintaksa:

public void close()   Parameters :    --------------   Return :    void   Exception :   ->   IOException :   if in case IO error occurs. 

poveži (vir PipedOutputStream): java.io.PipedInputStream.connect(vir PipedOutputStream) poveže cevovodni vhodni tok z "izvornim" cevovodnim izhodnim tokom in v primeru, da so "vir" cevi z nekim drugim tokom, se vrže izjema IO Sintaksa:

public void connect(PipedOutputStream source)   Parameters :    source : the Piped Output Stream to be connected to   Return :    void   Exception :   ->   IOException :   if in case IO error occurs. 

na voljo(): java.io.PipedInputStream.available() vrača št. bajtov, ki jih je mogoče prebrati iz vhodnega toka, ne da bi bili dejansko blokirani. Sintaksa:

public int available()   Parameters :    -------------   Return :    no. of bytes that can be read from Input Stream without actually being blocked. 0 if the stream is already closed but by invoking close() method   Exception :   ->   IOException :   if in case IO error occurs. 

Program Java, ki pojasnjuje delovanje metod razreda PipedInputStream: Java

   // Java program illustrating the working of PipedInputStream   // connect() read(byte[] buffer int offset int maxlen)   // close() available()   import     java.io.*  ;   public     class   NewClass   {      public     static     void     main  (  String  []     args  )     throws     IOException      {      PipedInputStream     geek_input     =     new     PipedInputStream  ();      PipedOutputStream     geek_output     =     new     PipedOutputStream  ();      try      {      // Use of connect() : connecting geek_input with geek_output      geek_input  .  connect  (  geek_output  );      geek_output  .  write  (  71  );      geek_output  .  write  (  69  );      geek_output  .  write  (  69  );      geek_output  .  write  (  75  );      geek_output  .  write  (  83  );      // Use of available() :      System  .  out  .  println  (  'Use of available() : '     +     geek_input  .  available  ());      // Use of read(byte[] buffer int offset int maxlen) :      byte  []     buffer     =     new     byte  [  5  ]  ;      // destination 'buffer'      geek_input  .  read  (  buffer       0       5  );      String     str     =     new     String  (  buffer  );      System  .  out  .  println  (  'Using read(buffer offset maxlen) : '     +     str  );      // USe of close() method :      System  .  out  .  println  (  'Closing the stream'  );      geek_input  .  close  ();      }      catch     (  IOException     except  )      {      except  .  printStackTrace  ();      }      }   }   

Izhod:

Use of available() : 5 Using read(buffer offset maxlen) : GEEKS Closing the stream 

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