android.util
public class
public class
android.util.PackedIntVector
| java.lang.Object | ||
| android.util.PackedIntVector | ||
PackedIntVector stores a two-dimensional array of integers, optimized for inserting and deleting rows and for offsetting the values in segments of a given column.
Summary
Public Constructors
| PackedIntVector(int columns) | |||||
| Creates a new PackedIntVector with the specified width and a height of 0. | |||||
Public Methods
| void | adjustValuesBelow(int startRow, int column, int delta) | ||||
| Increments all values in the specified column whose row >= the specified row by the specified delta. | |||||
| void | deleteAt(int row, int count) | ||||
| Deletes the specified number of rows starting with the specified row. | |||||
| int | getValue(int row, int column) | ||||
| Returns the value at the specified row and column. | |||||
| void | insertAt(int row, int[] values) | ||||
| Inserts a new row of values at the specified row offset. | |||||
| void | setValue(int row, int column, int value) | ||||
| Sets the value at the specified row and column. | |||||
| int | size() | ||||
| Returns the number of rows in the PackedIntVector. | |||||
| int | width() | ||||
| Returns the width of the PackedIntVector. | |||||
Methods inherited
from class
java.lang.Object
Details
Public Constructors
public PackedIntVector(int columns)
Creates a new PackedIntVector with the specified width and
a height of 0.
Parameters
| columns | the width of the PackedIntVector. |
|---|
Public Methods
public void adjustValuesBelow(int startRow, int column, int delta)
Increments all values in the specified column whose row >= the
specified row by the specified delta.
Parameters
| startRow | the row at which to begin incrementing. This may be == size(), which case there is no effect. |
|---|---|
| column | the index of the column to set. |
Throws
| IndexOutOfBoundsException | if the row is out of range (startRow < 0 || startRow > size()) or the column is out of range (column < 0 || column >= width()). |
|---|
public void deleteAt(int row, int count)
Deletes the specified number of rows starting with the specified
row.
Parameters
| row | the index of the first row to be deleted. |
|---|---|
| count | the number of rows to delete. |
Throws
| IndexOutOfBoundsException | if any of the rows to be deleted are out of range (row < 0 || count < 0 || row + count > size()). |
|---|
public int getValue(int row, int column)
Returns the value at the specified row and column.
Parameters
| row | the index of the row to return. |
|---|---|
| column | the index of the column to return. |
Returns
- the value stored at the specified position.
Throws
| IndexOutOfBoundsException | if the row is out of range (row < 0 || row >= size()) or the column is out of range (column < 0 || column >= width()). |
|---|
public void insertAt(int row, int[] values)
Inserts a new row of values at the specified row offset.
Parameters
| row | the row above which to insert the new row. This may be == size(), which case the new row is added at the end. |
|---|---|
| values | the new values to be added. If this is null, a row of zeroes is added. |
Throws
| IndexOutOfBoundsException | if the row is out of range (row < 0 || row > size()) or if the length of the values array is too small (values.length < width()). |
|---|
public void setValue(int row, int column, int value)
Sets the value at the specified row and column.
Parameters
| row | the index of the row to set. |
|---|---|
| column | the index of the column to set. |
Throws
| IndexOutOfBoundsException | if the row is out of range (row < 0 || row >= size()) or the column is out of range (column < 0 || column >= width()). |
|---|
public int size()
Returns the number of rows in the PackedIntVector. This number
will change as rows are inserted and deleted.
Returns
- the number of rows.
public int width()
Returns the width of the PackedIntVector. This number is set
at construction and will not change.
Returns
- the number of columns.