ucar.unidata.io.RandomAccessFile.readLong()方法的使用及代码示例

x33g5p2x  于2022-01-29 转载在 其他  
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本文整理了Java中ucar.unidata.io.RandomAccessFile.readLong方法的一些代码示例，展示了RandomAccessFile.readLong的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。RandomAccessFile.readLong方法的具体详情如下：
包路径：ucar.unidata.io.RandomAccessFile
类名称：RandomAccessFile
方法名：readLong

RandomAccessFile.readLong介绍

[英]Reads a signed 64-bit integer from this file. This method reads eight bytes from the file. If the bytes read, in order, are b1, b2, b3, b4, b5, b6, b7, and b8, where:

0 <= b1, b2, b3, b4, b5, b6, b7, b8 <=255,

then the result is equal to:

  1. ((long)b1 << 56) + ((long)b2 << 48) 
  2. + ((long)b3 << 40) + ((long)b4 << 32) 
  3. + ((long)b5 << 24) + ((long)b6 << 16) 
  4. + ((long)b7 << 8) + b8

This method blocks until the eight bytes are read, the end of the stream is detected, or an exception is thrown.
[中]从该文件中读取带符号的64位整数。此方法从文件中读取八个字节。如果按顺序读取的字节为b1、b2、b3、b4、b5、b6、b7和b8,，其中：
0 <= b1, b2, b3, b4, b5, b6, b7, b8 <=255,
那么结果等于：

  1. ((long)b1 << 56) + ((long)b2 << 48) 
  2. + ((long)b3 << 40) + ((long)b4 << 32) 
  3. + ((long)b5 << 24) + ((long)b6 << 16) 
  4. + ((long)b7 << 8) + b8

此方法会一直阻塞，直到读取了八个字节、检测到流结束或引发异常为止。

代码示例

代码示例来源：origin: edu.ucar/netcdf

  1. /**
  2.  * Read an array of longs
  3.  *
  4.  * @param pa    read into this array
  5.  * @param start starting at pa[start]
  6.  * @param n     read this many elements
  7.  * @throws IOException on read error
  8.  */
  9. public final void readLong(long[] pa, int start, int n) throws IOException {
  10.  for (int i = 0; i < n; i++) {
  11.   pa[start + i] = readLong();
  12.  }
  13. }

代码示例来源：origin: edu.ucar/cdm

  1. /**
  2.  * Read an array of longs
  3.  *
  4.  * @param pa    read into this array
  5.  * @param start starting at pa[start]
  6.  * @param n     read this many elements
  7.  * @throws IOException on read error
  8.  */
  9. public final void readLong(long[] pa, int start, int n) throws IOException {
  10.  for (int i = 0; i < n; i++) {
  11.   pa[start + i] = readLong();
  12.  }
  13. }

代码示例来源：origin: Unidata/thredds

  1. /**
  2.  * Read an array of longs
  3.  *
  4.  * @param pa    read into this array
  5.  * @param start starting at pa[start]
  6.  * @param n     read this many elements
  7.  * @throws IOException on read error
  8.  */
  9. public final void readLong(long[] pa, int start, int n) throws IOException {
  10.  for (int i = 0; i < n; i++) {
  11.   pa[start + i] = readLong();
  12.  }
  13. }

代码示例来源：origin: edu.ucar/unidataCommon

  1. /**
  2.  * Read an array of longs
  3.  *
  4.  * @param pa    read into this array
  5.  * @param start starting at pa[start]
  6.  * @param n     read this many elements
  7.  * @throws IOException on read error
  8.  */
  9. public final void readLong(long[] pa, int start, int n) throws IOException {
  10.  for (int i = 0; i < n; i++) {
  11.   pa[start + i] = readLong();
  12.  }
  13. }

代码示例来源：origin: edu.ucar/cdm

  1. /**
  2.  * Read an array of doubles
  3.  *
  4.  * @param pa    read into this array
  5.  * @param start starting at pa[start]
  6.  * @param n     read this many elements
  7.  * @throws IOException on read error
  8.  */
  9. public final void readDouble(double[] pa, int start, int n) throws IOException {
  10.  for (int i = 0; i < n; i++) {
  11.   pa[start + i] = Double.longBitsToDouble(readLong());
  12.  }
  13. }

代码示例来源：origin: Unidata/thredds

  1. /**
  2.  * Read an array of doubles
  3.  *
  4.  * @param pa    read into this array
  5.  * @param start starting at pa[start]
  6.  * @param n     read this many elements
  7.  * @throws IOException on read error
  8.  */
  9. public final void readDouble(double[] pa, int start, int n) throws IOException {
  10.  for (int i = 0; i < n; i++) {
  11.   pa[start + i] = Double.longBitsToDouble(readLong());
  12.  }
  13. }

代码示例来源：origin: edu.ucar/unidataCommon

  1. /**
  2.  * Read an array of doubles
  3.  *
  4.  * @param pa    read into this array
  5.  * @param start starting at pa[start]
  6.  * @param n     read this many elements
  7.  * @throws IOException on read error
  8.  */
  9. public final void readDouble(double[] pa, int start, int n) throws IOException {
  10.  for (int i = 0; i < n; i++) {
  11.    pa[start + i] = Double.longBitsToDouble(readLong());
  12.  }
  13. }

代码示例来源：origin: edu.ucar/netcdf

  1. /**
  2.  * Read an array of doubles
  3.  *
  4.  * @param pa    read into this array
  5.  * @param start starting at pa[start]
  6.  * @param n     read this many elements
  7.  * @throws IOException on read error
  8.  */
  9. public final void readDouble(double[] pa, int start, int n) throws IOException {
  10.  for (int i = 0; i < n; i++) {
  11.   pa[start + i] = Double.longBitsToDouble(readLong());
  12.  }
  13. }

代码示例来源：origin: edu.ucar/netcdf

  1. long readLength() throws IOException {
  2.  return isLengthLong ? raf.readLong() : (long) raf.readInt();
  3. }

代码示例来源：origin: edu.ucar/cdm

  1. long readLength() throws IOException {
  2.  return isLengthLong ? raf.readLong() : (long) raf.readInt();
  3. }

代码示例来源：origin: edu.ucar/cdm

  1. long readOffset() throws IOException {
  2.  return isOffsetLong ? raf.readLong() : (long) raf.readInt();
  3. }

代码示例来源：origin: Unidata/thredds

  1. long readLength() throws IOException {
  2.  return isLengthLong ? raf.readLong() : (long) raf.readInt();
  3. }

代码示例来源：origin: Unidata/thredds

  1. Record6() throws IOException {
  2.   creationOrder = raf.readLong();
  3.   raf.readFully(heapId);
  4.   if (debugBtree2)
  5.    debugOut.println("  record6 creationOrder=" + creationOrder + " heapId=" + Misc.showBytes(heapId));
  6.  }
  7. }

代码示例来源：origin: edu.ucar/netcdf

  1. Record6() throws IOException {
  2.   creationOrder = raf.readLong();
  3.   raf.read(heapId);
  4.   if (debugBtree2)
  5.    debugOut.println("  record6 creationOrder=" + creationOrder + " heapId=" + Misc.showBytes(heapId));
  6.  }
  7. }

代码示例来源：origin: edu.ucar/cdm

  1. Record6() throws IOException {
  2.   creationOrder = raf.readLong();
  3.   raf.readFully(heapId);
  4.   if (debugBtree2)
  5.    debugOut.println("  record6 creationOrder=" + creationOrder + " heapId=" + Misc.showBytes(heapId));
  6.  }
  7. }

代码示例来源：origin: edu.ucar/cdm

  1. void read() throws IOException {
  2.  if (debugPos) debugOut.println("   *MessageGroupNew start pos= " + raf.getFilePointer());
  3.  byte version = raf.readByte();
  4.  byte flags = raf.readByte();
  5.  if ((flags & 1) != 0) {
  6.   maxCreationIndex = raf.readLong();
  7.  }
  8.  fractalHeapAddress = readOffset();
  9.  v2BtreeAddress = readOffset(); // aka name index
  10.  if ((flags & 2) != 0) {
  11.   v2BtreeAddressCreationOrder = readOffset();
  12.  }
  13.  if (debug1) debugOut.println("   MessageGroupNew version= " + version + " flags = " + flags + this);
  14. }

代码示例来源：origin: edu.ucar/netcdf

  1. void read() throws IOException {
  2.  if (debugPos) debugOut.println("   *MessageGroupNew start pos= " + raf.getFilePointer());
  3.  byte version = raf.readByte();
  4.  byte flags = raf.readByte();
  5.  if ((flags & 1) != 0) {
  6.   maxCreationIndex = raf.readLong();
  7.  }
  8.  fractalHeapAddress = readOffset();
  9.  v2BtreeAddress = readOffset(); // aka name index
  10.  if ((flags & 2) != 0) {
  11.   v2BtreeAddressCreationOrder = readOffset();
  12.  }
  13.  if (debug1) debugOut.println("   MessageGroupNew version= " + version + " flags = " + flags + this);
  14. }

代码示例来源：origin: Unidata/thredds

  1. DataChunk(int ndim, boolean last) throws IOException {
  2.  this.size = h5.raf.readInt();
  3.  this.filterMask = h5.raf.readInt();
  4.  offset = new int[ndim];
  5.  for (int i = 0; i < ndim; i++) {
  6.   long loffset = h5.raf.readLong();
  7.   assert loffset < Integer.MAX_VALUE;
  8.   offset[i] = (int) loffset;
  9.  }
  10.  this.filePos = last ? -1 : h5.readAddress(); //
  11.  if (memTracker != null) memTracker.addByLen("Chunked Data (" + owner + ")", filePos, size);
  12. }

代码示例来源：origin: edu.ucar/netcdf

  1. DataChunk(int ndim, boolean last) throws IOException {
  2.  this.size = raf.readInt();
  3.  this.filterMask = raf.readInt();
  4.  offset = new int[ndim];
  5.  for (int i = 0; i < ndim; i++) {
  6.   long loffset = raf.readLong();
  7.   assert loffset < Integer.MAX_VALUE;
  8.   offset[i] = (int) loffset;
  9.  }
  10.  this.filePos = last ? -1 : h5.readAddress(); //
  11.  if (memTracker != null) memTracker.addByLen("Chunked Data (" + owner + ")", filePos, size);
  12. }

代码示例来源：origin: edu.ucar/cdm

  1. DataChunk(int ndim, boolean last) throws IOException {
  2.  this.size = raf.readInt();
  3.  this.filterMask = raf.readInt();
  4.  offset = new int[ndim];
  5.  for (int i = 0; i < ndim; i++) {
  6.   long loffset = raf.readLong();
  7.   assert loffset < Integer.MAX_VALUE;
  8.   offset[i] = (int) loffset;
  9.  }
  10.  this.filePos = last ? -1 : h5.readAddress(); //
  11.  if (memTracker != null) memTracker.addByLen("Chunked Data (" + owner + ")", filePos, size);
  12. }

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