Example usage for java.io InputStream read

Introduction

In this page you can find the example usage for java.io InputStream read.

Prototype

public int read(byte b[], int off, int len) throws IOException

Source Link

Document

Reads up to len bytes of data from the input stream into an array of bytes.

Usage

From source file:Main.java

public static int readShort(InputStream stream) throws IOException {
    final byte[] tmp = new byte[2];
    stream.read(tmp, 0, 2);
    return (tmp[1] & 0xFF) + ((tmp[0] & 0xFF) << 8);
}

From source file:Main.java

public static long readInt(InputStream stream) throws IOException {
    final byte[] tmp = new byte[4];
    stream.read(tmp, 0, 4);
    return (((long) (tmp[0] & 0xFF)) << 24) + +((tmp[1] & 0xFF) << 16) + +((tmp[2] & 0xFF) << 8)
            + +(tmp[3] & 0xFF);/* w ww.j a  va  2s. c om*/
}

From source file:Main.java

public static int readInt(InputStream stream) {
    final byte[] tmp = new byte[4];
    try {/* w w  w  .j  av  a 2s  .  co m*/
        stream.read(tmp, 0, 4);
    } catch (IOException e) {
        return -1;
    }
    return (tmp[0] << 24) + ((tmp[1] & 0xFF) << 16) + ((tmp[2] & 0xFF) << 8) + (tmp[3] & 0xFF);
}

From source file:Main.java

/**
 * Implements InputStream.read(int) in terms of InputStream.read(byte[], int, int).
 * InputStream assumes that you implement InputStream.read(int) and provides default
 * implementations of the others, but often the opposite is more efficient.
 *///from  w  w  w .j av  a  2  s  .co m
public static int readSingleByte(InputStream in) throws IOException {
    byte[] buffer = new byte[1];
    int result = in.read(buffer, 0, 1);
    return (result != -1) ? buffer[0] & 0xff : -1;
}

From source file:Main.java

public static int readShort(InputStream stream) {
    final byte[] tmp = new byte[2];
    try {//from w w w.ja  v  a 2s  . co m
        stream.read(tmp, 0, 2);
    } catch (IOException e) {
        return -1;
    }
    //   int i = ((tmp[1] & 0xFF) + ((tmp[0] & 0xFF) << 8));
    //   if (i > Short.MAX_VALUE)
    //   System.out.println("i = " + i);
    return ((tmp[1] & 0xFF) + ((tmp[0] & 0xFF) << 8));
}

From source file:Main.java

public static byte[] InputStream2Bytes(InputStream is) {
    String str = "";
    byte[] readByte = new byte[1024];
    try {/*w ww .jav a  2 s .  c  om*/
        while (is.read(readByte, 0, 1024) != -1) {
            str += new String(readByte).trim();
        }
        return str.getBytes();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

/**
 * Reads all data from stream and close it silently
 *
 * @param is Input stream//from   ww w .  j av a 2 s.c o m
 */
public static void readAndCloseStream(InputStream is) {
    final byte[] bytes = new byte[DEFAULT_BUFFER_SIZE];
    try {
        while (is.read(bytes, 0, DEFAULT_BUFFER_SIZE) != -1) {
        }
    } catch (IOException e) {
        // Do nothing
    } finally {
        closeSilently(is);
    }
}

From source file:Main.java

public static byte[] readFileContents(InputStream input) throws IOException {
    byte contents[] = new byte[10000], buf[] = new byte[1024];
    InputStream in = new BufferedInputStream(input);
    int bytes_read = 0;

    for (;;) {//ww w . j  a  va2  s .c o  m
        int tmp = in.read(buf, 0, buf.length);
        if (tmp == -1)
            break;
        System.arraycopy(buf, 0, contents, bytes_read, tmp);
        bytes_read += tmp;
    }

    byte[] retval = new byte[bytes_read];
    System.arraycopy(contents, 0, retval, 0, bytes_read);
    return retval;
}

From source file:Main.java

public static String getTypeByStream(InputStream is) {
    byte[] b = new byte[4];
    try {/*  w  ww . j  av a2  s .c o  m*/
        is.read(b, 0, b.length);
    } catch (IOException e) {
        e.printStackTrace();
    }
    String type = bytesToHexString(b).toUpperCase();
    if (type.contains("FFD8FF")) {
        return "jpg";
    } else if (type.contains("89504E47")) {
        return "png";
    } else if (type.contains("47494638")) {
        return "gif";
    } else if (type.contains("49492A00")) {
        return "tif";
    } else if (type.contains("424D")) {
        return "bmp";
    }
    return type;
}

From source file:Main.java

public static String readFile(Context context, String file, String code) {
    int len = 0;//w  w w.ja va 2  s . co m
    byte[] buf = null;
    String grammar = "";
    try {
        InputStream in = context.getAssets().open(file);
        len = in.available();
        buf = new byte[len];
        in.read(buf, 0, len);

        grammar = new String(buf, code);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return grammar;
}