Movatterモバイル変換

Class IntBuffer

java.lang.Object
- java.nio.Buffer
- - java.nio.IntBuffer

All Implemented Interfaces:
Comparable<IntBuffer>
```
public abstract classIntBufferextendsBufferimplementsComparable<IntBuffer>
```
An int buffer.
This class defines four categories of operations upon int buffers:
- Absolute and relativeget andput methods that read and write single ints;
- Relativebulk get methods that transfer contiguous sequences of ints from this buffer into an array; and
- Relativebulk put methods that transfer contiguous sequences of ints from an int array or some other int buffer into this buffer; and
- A method forcompacting an int buffer.
Int buffers can be created either byallocation, which allocates space for the buffer's content, bywrapping an existing int array into a buffer, or by creating aview of an existing byte buffer.
Like a byte buffer, an int buffer is eitherdirect ornon-direct. A int buffer created via thewrap methods of this class will be non-direct. An int buffer created as a view of a byte buffer will be direct if, and only if, the byte buffer itself is direct. Whether or not an int buffer is direct may be determined by invoking theisDirect method.
Methods in this class that do not otherwise have a value to return are specified to return the buffer upon which they are invoked. This allows method invocations to be chained.
Since:
1.4

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`staticIntBuffer`	`allocate(int capacity)`	Allocates a new int buffer.
`int[]`	`array()`	Returns the int array that backs this buffer (optional operation).
`int`	`arrayOffset()`	Returns the offset within this buffer's backing array of the first element of the buffer (optional operation).
`abstractIntBuffer`	`asReadOnlyBuffer()`	Creates a new, read-only int buffer that shares this buffer's content.
`abstractIntBuffer`	`compact()`	Compacts this buffer (optional operation).
`int`	`compareTo(IntBuffer that)`	Compares this buffer to another.
`abstractIntBuffer`	`duplicate()`	Creates a new int buffer that shares this buffer's content.
`boolean`	`equals(Object ob)`	Tells whether or not this buffer is equal to another object.
`abstract int`	`get()`	Relativeget method.
`abstract int`	`get(int index)`	Absoluteget method.
`IntBuffer`	`get(int[] dst)`	Relative bulkget method.
`IntBuffer`	`get(int[] dst, int offset, int length)`	Relative bulkget method.
`boolean`	`hasArray()`	Tells whether or not this buffer is backed by an accessible int array.
`int`	`hashCode()`	Returns the current hash code of this buffer.
`abstract boolean`	`isDirect()`	Tells whether or not this int buffer is direct.
`int`	`mismatch(IntBuffer that)`	Finds and returns the relative index of the first mismatch between this buffer and a given buffer.
`abstractByteOrder`	`order()`	Retrieves this buffer's byte order.
`abstractIntBuffer`	`put(int i)`	Relativeput method (optional operation).
`IntBuffer`	`put(int[] src)`	Relative bulkput method (optional operation).
`IntBuffer`	`put(int[] src, int offset, int length)`	Relative bulkput method (optional operation).
`abstractIntBuffer`	`put(int index, int i)`	Absoluteput method (optional operation).
`IntBuffer`	`put(IntBuffer src)`	Relative bulkput method (optional operation).
`abstractIntBuffer`	`slice()`	Creates a new int buffer whose content is a shared subsequence of this buffer's content.
`String`	`toString()`	Returns a string summarizing the state of this buffer.
`staticIntBuffer`	`wrap(int[] array)`	Wraps an int array into a buffer.
`staticIntBuffer`	`wrap(int[] array, int offset, int length)`	Wraps an int array into a buffer.

Methods declared in class java.nio.Buffer
capacity,clear,flip,hasRemaining,isReadOnly,limit,limit,mark,position,position,remaining,reset,rewind

Methods declared in class java.lang.Object
clone,finalize,getClass,notify,notifyAll,wait,wait,wait

- Method Detail
  - allocate
```
public static IntBuffer allocate(int capacity)
```
    Allocates a new int buffer.
    The new buffer's position will be zero, its limit will be its capacity, its mark will be undefined, each of its elements will be initialized to zero, and its byte order will be thenative order of the underlying hardware. It will have abacking array, and itsarray offset will be zero.
    Parameters:
    capacity - The new buffer's capacity, in ints
    Returns:
    The new int buffer
    Throws:
    IllegalArgumentException - If thecapacity is a negative integer
  - wrap
```
public static IntBuffer wrap(int[] array,                             int offset,                             int length)
```
    Wraps an int array into a buffer.
    The new buffer will be backed by the given int array; that is, modifications to the buffer will cause the array to be modified and vice versa. The new buffer's capacity will bearray.length, its position will beoffset, its limit will beoffset + length, its mark will be undefined, and its byte order will be thenative order of the underlying hardware. Itsbacking array will be the given array, and itsarray offset will be zero.
    Parameters:
    array - The array that will back the new buffer
    offset - The offset of the subarray to be used; must be non-negative and no larger thanarray.length. The new buffer's position will be set to this value.
    length - The length of the subarray to be used; must be non-negative and no larger thanarray.length - offset. The new buffer's limit will be set tooffset + length.
    Returns:
    The new int buffer
    Throws:
    IndexOutOfBoundsException - If the preconditions on theoffset andlength parameters do not hold
  - wrap
```
public static IntBuffer wrap(int[] array)
```
    Wraps an int array into a buffer.
    The new buffer will be backed by the given int array; that is, modifications to the buffer will cause the array to be modified and vice versa. The new buffer's capacity and limit will bearray.length, its position will be zero, its mark will be undefined, and its byte order will be thenative order of the underlying hardware. Itsbacking array will be the given array, and itsarray offset will be zero.
    Parameters:
    array - The array that will back this buffer
    Returns:
    The new int buffer
  - slice
```
public abstract IntBuffer slice()
```
    Creates a new int buffer whose content is a shared subsequence of this buffer's content.
    The content of the new buffer will start at this buffer's current position. Changes to this buffer's content will be visible in the new buffer, and vice versa; the two buffers' position, limit, and mark values will be independent.
    The new buffer's position will be zero, its capacity and its limit will be the number of ints remaining in this buffer, its mark will be undefined, and its byte order will be identical to that of this buffer. The new buffer will be direct if, and only if, this buffer is direct, and it will be read-only if, and only if, this buffer is read-only.
    Specified by:
    slice in class Buffer
    Returns:
    The new int buffer
  - duplicate
```
public abstract IntBuffer duplicate()
```
    Creates a new int buffer that shares this buffer's content.
    The content of the new buffer will be that of this buffer. Changes to this buffer's content will be visible in the new buffer, and vice versa; the two buffers' position, limit, and mark values will be independent.
    The new buffer's capacity, limit, position, mark values, and byte order will be identical to those of this buffer. The new buffer will be direct if, and only if, this buffer is direct, and it will be read-only if, and only if, this buffer is read-only.
    Specified by:
    duplicate in class Buffer
    Returns:
    The new int buffer
  - asReadOnlyBuffer
```
public abstract IntBuffer asReadOnlyBuffer()
```
    Creates a new, read-only int buffer that shares this buffer's content.
    The content of the new buffer will be that of this buffer. Changes to this buffer's content will be visible in the new buffer; the new buffer itself, however, will be read-only and will not allow the shared content to be modified. The two buffers' position, limit, and mark values will be independent.
    The new buffer's capacity, limit, position, mark values, and byte order will be identical to those of this buffer.
    If this buffer is itself read-only then this method behaves in exactly the same way as theduplicate method.
    Returns:
    The new, read-only int buffer
  - get
```
public abstract int get()
```
    Relativeget method. Reads the int at this buffer's current position, and then increments the position.
    Returns:
    The int at the buffer's current position
    Throws:
    BufferUnderflowException - If the buffer's current position is not smaller than its limit
  - put
```
public abstract IntBuffer put(int i)
```
    Relativeput method (optional operation).
    Writes the given int into this buffer at the current position, and then increments the position.
    Parameters:
    i - The int to be written
    Returns:
    This buffer
    Throws:
    BufferOverflowException - If this buffer's current position is not smaller than its limit
    ReadOnlyBufferException - If this buffer is read-only
  - get
```
public abstract int get(int index)
```
    Absoluteget method. Reads the int at the given index.
    Parameters:
    index - The index from which the int will be read
    Returns:
    The int at the given index
    Throws:
    IndexOutOfBoundsException - Ifindex is negative or not smaller than the buffer's limit
  - put
```
public abstract IntBuffer put(int index,                              int i)
```
    Absoluteput method (optional operation).
    Writes the given int into this buffer at the given index.
    Parameters:
    index - The index at which the int will be written
    i - The int value to be written
    Returns:
    This buffer
    Throws:
    IndexOutOfBoundsException - Ifindex is negative or not smaller than the buffer's limit
    ReadOnlyBufferException - If this buffer is read-only
  - get
```
public IntBuffer get(int[] dst,                     int offset,                     int length)
```
    Relative bulkget method.
    This method transfers ints from this buffer into the given destination array. If there are fewer ints remaining in the buffer than are required to satisfy the request, that is, iflength > remaining(), then no ints are transferred and aBufferUnderflowException is thrown.
    Otherwise, this method copieslength ints from this buffer into the given array, starting at the current position of this buffer and at the given offset in the array. The position of this buffer is then incremented bylength.
    In other words, an invocation of this method of the formsrc.get(dst, off, len) has exactly the same effect as the loop
    for (int i = off; i < off + len; i++) dst[i] = src.get();
    except that it first checks that there are sufficient ints in this buffer and it is potentially much more efficient.
    Parameters:
    dst - The array into which ints are to be written
    offset - The offset within the array of the first int to be written; must be non-negative and no larger thandst.length
    length - The maximum number of ints to be written to the given array; must be non-negative and no larger thandst.length - offset
    Returns:
    This buffer
    Throws:
    BufferUnderflowException - If there are fewer thanlength ints remaining in this buffer
    IndexOutOfBoundsException - If the preconditions on theoffset andlength parameters do not hold
  - get
```
public IntBuffer get(int[] dst)
```
    Relative bulkget method.
    This method transfers ints from this buffer into the given destination array. An invocation of this method of the formsrc.get(a) behaves in exactly the same way as the invocation
    src.get(a, 0, a.length)
    Parameters:
    dst - The destination array
    Returns:
    This buffer
    Throws:
    BufferUnderflowException - If there are fewer thanlength ints remaining in this buffer
  - put
```
public IntBuffer put(IntBuffer src)
```
    Relative bulkput method (optional operation).
    This method transfers the ints remaining in the given source buffer into this buffer. If there are more ints remaining in the source buffer than in this buffer, that is, ifsrc.remaining() > remaining(), then no ints are transferred and aBufferOverflowException is thrown.
    Otherwise, this method copiesn = src.remaining() ints from the given buffer into this buffer, starting at each buffer's current position. The positions of both buffers are then incremented byn.
    In other words, an invocation of this method of the formdst.put(src) has exactly the same effect as the loop
    while (src.hasRemaining()) dst.put(src.get());
    except that it first checks that there is sufficient space in this buffer and it is potentially much more efficient. If this buffer and the source buffer share the same backing array or memory, then the result will be as if the source elements were first copied to an intermediate location before being written into this buffer.
    Parameters:
    src - The source buffer from which ints are to be read; must not be this buffer
    Returns:
    This buffer
    Throws:
    BufferOverflowException - If there is insufficient space in this buffer for the remaining ints in the source buffer
    IllegalArgumentException - If the source buffer is this buffer
    ReadOnlyBufferException - If this buffer is read-only
  - put
```
public IntBuffer put(int[] src,                     int offset,                     int length)
```
    Relative bulkput method (optional operation).
    This method transfers ints into this buffer from the given source array. If there are more ints to be copied from the array than remain in this buffer, that is, iflength > remaining(), then no ints are transferred and aBufferOverflowException is thrown.
    Otherwise, this method copieslength ints from the given array into this buffer, starting at the given offset in the array and at the current position of this buffer. The position of this buffer is then incremented bylength.
    In other words, an invocation of this method of the formdst.put(src, off, len) has exactly the same effect as the loop
    for (int i = off; i < off + len; i++) dst.put(a[i]);
    except that it first checks that there is sufficient space in this buffer and it is potentially much more efficient.
    Parameters:
    src - The array from which ints are to be read
    offset - The offset within the array of the first int to be read; must be non-negative and no larger thanarray.length
    length - The number of ints to be read from the given array; must be non-negative and no larger thanarray.length - offset
    Returns:
    This buffer
    Throws:
    BufferOverflowException - If there is insufficient space in this buffer
    IndexOutOfBoundsException - If the preconditions on theoffset andlength parameters do not hold
    ReadOnlyBufferException - If this buffer is read-only
  - put
```
public final IntBuffer put(int[] src)
```
    Relative bulkput method (optional operation).
    This method transfers the entire content of the given source int array into this buffer. An invocation of this method of the formdst.put(a) behaves in exactly the same way as the invocation
    dst.put(a, 0, a.length)
    Parameters:
    src - The source array
    Returns:
    This buffer
    Throws:
    BufferOverflowException - If there is insufficient space in this buffer
    ReadOnlyBufferException - If this buffer is read-only
  - hasArray
```
public final boolean hasArray()
```
    Tells whether or not this buffer is backed by an accessible int array.
    If this method returnstrue then thearray andarrayOffset methods may safely be invoked.
    Specified by:
    hasArray in class Buffer
    Returns:
    true if, and only if, this buffer is backed by an array and is not read-only
  - array
```
public final int[] array()
```
    Returns the int array that backs this buffer (optional operation).
    Modifications to this buffer's content will cause the returned array's content to be modified, and vice versa.
    Invoke thehasArray method before invoking this method in order to ensure that this buffer has an accessible backing array.
    Specified by:
    array in class Buffer
    Returns:
    The array that backs this buffer
    Throws:
    ReadOnlyBufferException - If this buffer is backed by an array but is read-only
    UnsupportedOperationException - If this buffer is not backed by an accessible array
  - arrayOffset
```
public final int arrayOffset()
```
    Returns the offset within this buffer's backing array of the first element of the buffer (optional operation).
    If this buffer is backed by an array then buffer positionp corresponds to array indexp + arrayOffset().
    Invoke thehasArray method before invoking this method in order to ensure that this buffer has an accessible backing array.
    Specified by:
    arrayOffset in class Buffer
    Returns:
    The offset within this buffer's array of the first element of the buffer
    Throws:
    ReadOnlyBufferException - If this buffer is backed by an array but is read-only
    UnsupportedOperationException - If this buffer is not backed by an accessible array
  - compact
```
public abstract IntBuffer compact()
```
    Compacts this buffer (optional operation).
    The ints between the buffer's current position and its limit, if any, are copied to the beginning of the buffer. That is, the int at indexp = position() is copied to index zero, the int at indexp + 1 is copied to index one, and so forth until the int at indexlimit() - 1 is copied to indexn = limit() - 1 - p. The buffer's position is then set ton+1 and its limit is set to its capacity. The mark, if defined, is discarded.
    The buffer's position is set to the number of ints copied, rather than to zero, so that an invocation of this method can be followed immediately by an invocation of another relativeput method.
    Returns:
    This buffer
    Throws:
    ReadOnlyBufferException - If this buffer is read-only
  - isDirect
```
public abstract boolean isDirect()
```
    Tells whether or not this int buffer is direct.
    Specified by:
    isDirect in class Buffer
    Returns:
    true if, and only if, this buffer is direct
  - toString
```
public String toString()
```
    Returns a string summarizing the state of this buffer.
    Overrides:
    toString in class Object
    Returns:
    A summary string
  - hashCode
```
public int hashCode()
```
    Returns the current hash code of this buffer.
    The hash code of a int buffer depends only upon its remaining elements; that is, upon the elements fromposition() up to, and including, the element atlimit() - 1.
    Because buffer hash codes are content-dependent, it is inadvisable to use buffers as keys in hash maps or similar data structures unless it is known that their contents will not change.
    Overrides:
    hashCode in class Object
    Returns:
    The current hash code of this buffer
    See Also:
    Object.equals(java.lang.Object),System.identityHashCode(java.lang.Object)
  - equals
```
public boolean equals(Object ob)
```
    Tells whether or not this buffer is equal to another object.
    Two int buffers are equal if, and only if,
    They have the same element type,
    They have the same number of remaining elements, and
    The two sequences of remaining elements, considered independently of their starting positions, are pointwise equal.
    A int buffer is not equal to any other type of object.
    Overrides:
    equals in class Object
    Parameters:
    ob - The object to which this buffer is to be compared
    Returns:
    true if, and only if, this buffer is equal to the given object
    See Also:
    Object.hashCode(),HashMap
  - compareTo
```
public int compareTo(IntBuffer that)
```
    Compares this buffer to another.
    Two int buffers are compared by comparing their sequences of remaining elements lexicographically, without regard to the starting position of each sequence within its corresponding buffer. Pairs ofint elements are compared as if by invokingInteger.compare(int,int).
    A int buffer is not comparable to any other type of object.
    Specified by:
    compareTo in interface Comparable<IntBuffer>
    Parameters:
    that - the object to be compared.
    Returns:
    A negative integer, zero, or a positive integer as this buffer is less than, equal to, or greater than the given buffer
  - mismatch
```
public int mismatch(IntBuffer that)
```
    Finds and returns the relative index of the first mismatch between this buffer and a given buffer. The index is relative to theposition of each buffer and will be in the range of 0 (inclusive) up to the smaller of theremaining elements in each buffer (exclusive).
    If the two buffers share a common prefix then the returned index is the length of the common prefix and it follows that there is a mismatch between the two buffers at that index within the respective buffers. If one buffer is a proper prefix of the other then the returned index is the smaller of the remaining elements in each buffer, and it follows that the index is only valid for the buffer with the larger number of remaining elements. Otherwise, there is no mismatch.
    Parameters:
    that - The byte buffer to be tested for a mismatch with this buffer
    Returns:
    The relative index of the first mismatch between this and the given buffer, otherwise -1 if no mismatch.
    Since:
    11
  - order
```
public abstract ByteOrder order()
```
    Retrieves this buffer's byte order.
    The byte order of an int buffer created by allocation or by wrapping an existingint array is thenative order of the underlying hardware. The byte order of an int buffer created as aview of a byte buffer is that of the byte buffer at the moment that the view is created.
    Returns:
    This buffer's byte order

Movatterモバイル変換

Class IntBuffer

Method Summary

Methods declared in class java.nio.Buffer

Methods declared in class java.lang.Object

Method Detail

allocate

wrap

wrap

slice

duplicate

asReadOnlyBuffer

get

put

get

put

get

get

put

put

put

hasArray

array

arrayOffset

compact

isDirect

toString

hashCode

equals

compareTo

mismatch

order