RandomAccessReader

Vue d’ensemble

‘RandomAccessReader’ est une classe dans Aspose.PDF FOSS pour Java.Déduit de: ‘Closeable’.

Le lecteur d’accès aléatoire pour les fichiers PDF.

Cette classe fournit 18 méthodes pour travailler avec les objets RandomAccessReader dans des programmes Java. Les méthodologies disponibles comprennent: ‘close’, ‘findBackward’, findForward' , 'fromBytes', ‘fronBythesNoCopy', ’frolFile’, 'fraStream', ''getLength, ‘getPosition’,‘‘isEOF , ''peek et ‘read 4 méthode supplémentaires. Tous les membres publics sont accessibles à toute application Java après l'installation de l’Aspose.PDF FOSS pour le package Java . Propriétés : 'eOF', "longueur’, «position’.

Propriétés

Name	Type	Access	Description
`position`	`long`	Read	Returns the current read position.
`length`	`long`	Read	Returns the total length of the data source.
`eOF`	`boolean`	Read	Returns {@code true} if the current position is at or past the end of data.

méthodes

Signature	Description
`fromFile(file: File)` → `RandomAccessReader`	Creates a reader backed by a file.
`fromFile(path: Path)` → `RandomAccessReader`	Creates a reader backed by a file.
`fromBytes(data: byte[])` → `RandomAccessReader`	Creates a reader backed by an in-memory byte array.
`fromBytesNoCopy(data: byte[])` → `RandomAccessReader`	Creates a reader over the given array WITHOUT a defensive copy.
`fromStream(is: InputStream)` → `RandomAccessReader`	Creates a reader by reading the entire input stream into memory.
`getPosition()` → `long`	Returns the current read position.
`getLength()` → `long`	Returns the total length of the data source.
`seek(pos: long)`	Seeks to the given absolute position.
`skip(n: long)`	Advances the position by the given number of bytes.
`read()` → `int`	Reads a single byte at the current position and advances by one.
`read(buf: byte[], off: int, len: int)` → `int`	Reads up to {@code len} bytes into the given array.
`readFully(len: int)` → `byte[]`	Reads exactly {@code length} bytes, throwing {@link EOFException} if not enough data is available.
`peek()` → `int`	Reads the next byte without advancing the position.
`readLine()` → `String`	Reads an ASCII line (terminated by LF or CR+LF).
`isEOF()` → `boolean`	Returns {@code true} if the current position is at or past the end of data.
`findBackward(pattern: byte[], startFrom: long)` → `long`	Searches backward from {@code startFrom} for the given byte pattern.
`findForward(pattern: byte[], startFrom: long)` → `long`	Searches forward from the given position for the first occurrence of the pattern.
`close()`	Closes this reader and releases any underlying resources.

Voir aussi

Aspose.PDF pour Java — API d’entreprise