List of usage examples for java.io RandomAccessFile seek
public void seek(long pos) throws IOException
From source file:edu.usc.qufd.Main.java
/** * The main method./*ww w .j av a 2 s .c om*/ * * @param args the arguments * @throws IOException Signals that an I/O exception has occurred. */ public static void main(String[] args) throws IOException { if (parseInputs(args) == false) { System.exit(-1); //The input files do not exist } /* * Parsing inputs: fabric & qasm file */ PrintWriter outputFile; RandomAccessFile raf = null; String latencyPlaceHolder; if (RuntimeConfig.OUTPUT_TO_FILE) { latencyPlaceHolder = "Total Latency: " + Long.MAX_VALUE + " us" + System.lineSeparator(); raf = new RandomAccessFile(outputFileAddr, "rws"); //removing the old values in the file raf.setLength(0); //writing a place holder for the total latency raf.writeBytes(latencyPlaceHolder); raf.close(); outputFile = new PrintWriter(new BufferedWriter(new FileWriter(outputFileAddr, true)), true); } else { //writing to stdout outputFile = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)), true); } /* parsing the input*/ layout = LayoutParser.parse(pmdFileAddr); qasm = QASMParser.QASMParser(qasmFileAddr, layout); long totalLatency = qufd(outputFile); if (RuntimeConfig.OUTPUT_TO_FILE) { outputFile.close(); //Over writing the place holder with the actual latency String latencyActual = "Total Latency: " + totalLatency + " " + layout.getTimeUnit(); latencyActual = StringUtils.rightPad(latencyActual, latencyPlaceHolder.length() - System.lineSeparator().length()); raf = new RandomAccessFile(outputFileAddr, "rws"); //Writing to the top of a file raf.seek(0); //writing the actual total latency in the at the top of the output file raf.writeBytes(latencyActual + System.lineSeparator()); raf.close(); } else { outputFile.flush(); System.out.println("Total Latency: " + totalLatency + " " + layout.getTimeUnit()); } if (RuntimeConfig.VERBOSE) { System.out.println("Done."); } outputFile.close(); }
From source file:Main.java
public static void append(String fileName, String text) throws Exception { File f = new File(fileName); long fileLength = f.length(); RandomAccessFile raf = new RandomAccessFile(f, "rw"); raf.seek(fileLength); raf.writeBytes(text);//www . ja v a2 s.c om raf.close(); }
From source file:Main.java
public static void append(String fileName, byte[] bytes) throws Exception { File f = new File(fileName); long fileLength = f.length(); RandomAccessFile raf = new RandomAccessFile(f, "rw"); raf.seek(fileLength); raf.write(bytes);/* w ww . j a va 2s. c o m*/ raf.close(); }
From source file:Main.java
/** * RandomAccessFile seek and readFully/* w ww. j a va2 s. co m*/ * * @param raf * @param index * @param buffer * @throws IOException */ private static void readFully(RandomAccessFile raf, long index, byte[] buffer) throws IOException { raf.seek(index); raf.readFully(buffer); }
From source file:Main.java
public static void incrementReadCounter(RandomAccessFile raf) throws IOException { long currentPosition = raf.getFilePointer(); raf.seek(0); int counter = raf.readInt(); counter++;//from ww w. j a va 2 s. c om raf.seek(0); raf.writeInt(counter); raf.seek(currentPosition); }
From source file:Main.java
public static void readStreamToFile(InputStream inStream, String filePath) throws Exception { File file = new File(filePath + ".wei"); RandomAccessFile outStream = new RandomAccessFile(file, "rw"); outStream.seek(0); byte[] buffer = new byte[1024]; int len = -1; while ((len = inStream.read(buffer)) != -1) { outStream.write(buffer, 0, len); }/*w w w . j a v a2 s .c o m*/ outStream.close(); inStream.close(); file.renameTo(new File(filePath)); return; }
From source file:Main.java
public static void WriteTxtFile(Context context, String strcontent) { String strContent = strcontent + "\n"; try {/*from w w w . jav a 2s. c om*/ File file = new File(context.getCacheDir() + File.separator + "wanjia.txt"); if (!file.exists()) { file.createNewFile(); } RandomAccessFile raf = new RandomAccessFile(file, "rw"); raf.seek(file.length()); raf.write(strContent.getBytes()); raf.close(); } catch (Exception e) { e.printStackTrace(); } }
From source file:Main.java
public static boolean appendFile(String filename, byte[] data, int datapos, int datalength) { try {//from ww w. j a v a2s.c o m createFile(filename); RandomAccessFile rf = new RandomAccessFile(filename, "rw"); rf.seek(rf.length()); rf.write(data, datapos, datalength); if (rf != null) { rf.close(); } } catch (Exception e) { e.printStackTrace(); } return true; }
From source file:com.feilong.tools.net.ZClientTest.java
/** * Gets the files./*from w ww . j a v a 2 s . c o m*/ * * @param ftp * the ftp * @param localDir * the local dir * @throws IOException * Signals that an I/O exception has occurred. */ private static void testGetFiles(FTPClient ftp, File localDir) throws IOException { String[] names = ftp.listNames(); for (String name : names) { File file = new File(localDir.getPath() + File.separator + name); if (!file.exists()) { file.createNewFile(); } long pos = file.length(); RandomAccessFile raf = new RandomAccessFile(file, "rw"); raf.seek(pos); ftp.setRestartOffset(pos); InputStream is = ftp.retrieveFileStream(name); if (is == null) { log.info("no such file:" + name); } else { log.info("start getting file:" + name); int b; while ((b = is.read()) != -1) { raf.write(b); } is.close(); if (ftp.completePendingCommand()) { log.info("done!"); } else { log.info("can't get file:" + name); } } raf.close(); } }
From source file:Main.java
public static short[] fromAudioFile(RandomAccessFile f) { short[] samples = null; try {/* www . j a va 2 s . c o m*/ samples = new short[(int) (f.length() / 2)]; f.seek(0); //Seek to start point of file for (int i = 0; i < f.length() / 2; i++) { samples[i] = f.readShort(); } f.close(); } catch (IOException e) { e.printStackTrace(); } return samples; }