jrectRef-class {rJava} | R Documentation |

## Rectangular java arrays

### Description

References to java arrays that are guaranteed to be rectangular, i.e similar
to R arrays

### Objects from the Class

Objects of this class should *not* be created directly.
Instead, they usually come as a result of a java method call.

### Slots

`jsig`

:JNI signature of the array type

`jobj`

:Internal identifier of the object

`jclass`

:Inherited from `jobjRef`

, but unspecified

`dimension`

:dimension vector of the array

### Extends

Class `"jarrayRef"`

, directly.
Class `"jobjRef"`

, by class "jarrayRef", distance 2.

### Methods

- length
`signature(x = "jrectRef")`

: The number of elements in the array.
Note that if the array has more than one dimension,
it gives the number of arrays in the first dimension, and not the total
number of atomic objects in tha array (like R does). This gives what would be
returned by `array.length`

in java.

- str
`signature(object = "jrectRef")`

: ...

- [
`signature(x = "jrectRef")`

: R indexing of rectangular java arrays

- dim
`signature(x = "jrectRef")`

: extracts the dimensions of the array

- dim<-
`signature(x = "jrectRef")`

: sets the dimensions of the array

- unique
`signature(x = "jrectRef")`

: unique objects in the array

- duplicated
`signature(x = "jrectRef")`

: see `duplicated`

- anyDuplicated
`signature(x = "jrectRef")`

: see `anyDuplicated`

- sort
`signature(x = "jrectRef")`

: returns a *new* array with elements from x in order

- rev
`signature(x = "jrectRef")`

: returns a *new* array with elements from x reversed

- min
`signature(x = "jrectRef")`

: the smallest object in the array (in the sense of the Comparable interface)

- max
`signature(x = "jrectRef")`

: the biggest object in the array (in the sense of the Comparable interface)

- range
`signature(x = "jrectRef")`

: the range of the array (in the sense of the Comparable interface)

### Examples

v <- new( J("java.util.Vector") )
v$add( "hello" )
v$add( "world" )
v$add( new( J("java.lang.Double"), "10.2" ) )
array <- v$toArray()
array[ c(TRUE,FALSE,TRUE) ]
array[ 1:2 ]
array[ -3 ]
# length
length( array )
# also works as a pseudo field as in java
array$length

[Package

*rJava* version 0.9-12

Index]