Examples of java.io.RandomAccessFile.readFully()

java.io.RandomAccessFile.readFully()
Reads bytes from this stream into the byte array buffer. This method will block until buffer.length number of bytes have been read. @param buffer the buffer to read bytes into @throws IOException If a problem occurs reading from this DataInputStream. @see DataOutput#write(byte[]) @see DataOutput#write(byte[],int,int)

      //truncate blockFile
      blockRAF.setLength(newlen);


      //read last chunk
      blockRAF.seek(lastchunkoffset);
      blockRAF.readFully(b, 0, lastchunksize);
    } finally {
      blockRAF.close();
    }


    //compute checksum

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    }
    byte[] data = new byte[numBytes];
    RandomAccessFile in = null;
    try {
      in = new RandomAccessFile(file, "r");
      in.readFully(data);
      in.close();
    } catch (IOException ioe) {
      return null;
    } finally {
      try {

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    public static String readFile(File file) throws IOException {
        byte[] byteContent;
        RandomAccessFile in = new RandomAccessFile(file, "r");
        try {
            byteContent = new byte[(int) in.length()];
            in.readFully(byteContent);
        } finally {
            try {
                in.close();
            } catch (IOException e) {
                // Ignore.

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        // Test for method void java.io.RandomAccessFile.readFully(byte [])
        byte[] buf = new byte[10];
        RandomAccessFile raf = new java.io.RandomAccessFile(fileName, "rw");
        raf.writeBytes("HelloWorld");
        raf.seek(0);
        raf.readFully(buf);
        assertEquals("Incorrect bytes read/written", "HelloWorld", new String(
                buf, 0, 10, "UTF-8"));
        raf.close();
    }

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        // int)
        byte[] buf = new byte[10];
        RandomAccessFile raf = new java.io.RandomAccessFile(fileName, "rw");
        raf.writeBytes("HelloWorld");
        raf.seek(0);
        raf.readFully(buf, 0, buf.length);
        assertEquals("Incorrect bytes read/written", "HelloWorld", new String(
                buf, 0, 10, "UTF-8"));
        try {
            raf.readFully(buf, 0, buf.length);
            fail("Reading past end of buffer did not throw EOFException");

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        raf.seek(0);
        raf.readFully(buf, 0, buf.length);
        assertEquals("Incorrect bytes read/written", "HelloWorld", new String(
                buf, 0, 10, "UTF-8"));
        try {
            raf.readFully(buf, 0, buf.length);
            fail("Reading past end of buffer did not throw EOFException");
        } catch (EOFException e) {}
        raf.close();
    }

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        byte[] buf = new byte[5];
        RandomAccessFile raf = new java.io.RandomAccessFile(fileName, "rw");
        raf.writeBytes("HelloWorld");
        raf.seek(0);
        raf.skipBytes(5);
        raf.readFully(buf);
        assertEquals("Failed to skip bytes", "World", new String(buf, 0, 5, "UTF-8"));
        raf.close();
    }


    /**

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        // java.io.RandomAccessFile.writeBytes(java.lang.String)
        byte[] buf = new byte[10];
        RandomAccessFile raf = new java.io.RandomAccessFile(fileName, "rw");
        raf.writeBytes("HelloWorld");
        raf.seek(0);
        raf.readFully(buf);
        assertEquals("Incorrect bytes read/written", "HelloWorld", new String(
                buf, 0, 10, "UTF-8"));
        raf.close();


    }

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      //truncate blockFile 
      blockRAF.setLength(newlen);
 
      //read last chunk
      blockRAF.seek(lastchunkoffset);
      blockRAF.readFully(b, 0, lastchunksize);
    } finally {
      blockRAF.close();
    }


    //compute checksum

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        // java.io.RandomAccessFile.writeBytes(java.lang.String)
        byte[] buf = new byte[10];
        RandomAccessFile raf = new java.io.RandomAccessFile(fileName, "rw");
        raf.writeBytes("HelloWorld");
        raf.seek(0);
        raf.readFully(buf);
        assertEquals("Incorrect bytes read/written", "HelloWorld", new String(
                buf, 0, 10));
        raf.close();


    }

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