ByteBuffer: asLongBuffer() : ByteBuffer « java.nio « Java by API






  1. Java by API
  2. java.nio
  3. ByteBuffer

ByteBuffer: asLongBuffer()

   
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class MainClass {
  public static void main(String[] args) {
    File aFile = new File("file.dat");
    FileInputStream inFile = null;

    try {
      inFile = new FileInputStream(aFile);
    } catch (FileNotFoundException e) {
      e.printStackTrace(System.err);
      System.exit(0);
    }
    FileChannel inChannel = inFile.getChannel();
    final int COUNT = 6;
    ByteBuffer buf = ByteBuffer.allocate(8 * COUNT);
    long[] data = new long[COUNT];
    try {
      while (inChannel.read(buf) != -1) {
        ((ByteBuffer) (buf.flip())).asLongBuffer().get(data);
        System.out.println();
        for (long prime : data)
          System.out.printf("%10d", prime);
        buf.clear();
      }
      System.out.println("\nEOF reached.");
      inFile.close();
    } catch (IOException e) {
      e.printStackTrace(System.err);
      System.exit(1);
    }
  }
}








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15.ByteBuffer: getDouble()
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18.ByteBuffer: getLong()
19.ByteBuffer: isDirect()
20.ByteBuffer: limit()
21.ByteBuffer: order()
22.ByteBuffer: order(ByteOrder bo)
23.ByteBuffer: position()
24.ByteBuffer: position(int newPosition)
25.ByteBuffer: put(byte b)
26.ByteBuffer: putChar(char ch)
27.ByteBuffer: putDouble(double value)
28.ByteBuffer: putFloat(float value)
29.ByteBuffer: putInt(int i)
30.ByteBuffer: putLong(long value)
31.ByteBuffer: putShort(short value)
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