iicm.vrml.pwutils
Class DoubleArray

java.lang.Object
  iicm.vrml.pwutils.DoubleArray

public class DoubleArray
extends java.lang.Object

DoubleArray - dynamic array of double type values better time and memory efficiency than Vector, double[] accessible in native code Copyright (c) 1996 IICM

Version:

0.1, latest change: 1 Okt 96

Author:

Michael Pichler, Karin Roschker, (based on Field macro by Gerald Pani)

Field Summary

private int	count_
private double[]	data_

Constructor Summary

DoubleArray()
create with default length

DoubleArray(double[] dat)
copy initial data from another double[].

DoubleArray(DoubleArray dat)
copy initial data from another DoubleArray (non-null).

DoubleArray(int len)
create with initial buffer length

Method Summary

void	append(double d) append one double element
boolean	clearData() clear the array
private void	enlarge(int newsize) enlarge the data array to its new size; does not change count_
int	getCount() get count of used array members.
double[]	getData() get data array.
void	setData(double[] dat) copy data from a double[]
void	setData(double[] dat, int n) copy first n elements of a double[]
void	setData(DoubleArray dat) copy data from another DoubleArray
void	setSize(int n) set number of used array elements (ensures there is enough storage)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

data_

private double[] data_

count_

private int count_

Constructor Detail

DoubleArray

public DoubleArray()

create with default length

DoubleArray

public DoubleArray(int len)

create with initial buffer length

DoubleArray

public DoubleArray(double[] dat)

copy initial data from another double[]. To say it again: values in double[] are *copied* and not just referenced by this class

DoubleArray

public DoubleArray(DoubleArray dat)

copy initial data from another DoubleArray (non-null). do not use the above constructor in this case, as it would use all values, not just the used length (count); again: values are *copied*

Method Detail

setData

public void setData(DoubleArray dat)

copy data from another DoubleArray

setData

public void setData(double[] dat)

copy data from a double[]

setData

public void setData(double[] dat,
                    int n)

copy first n elements of a double[]

getCount

public final int getCount()

get count of used array members. Note: may be smaller than data_.length

getData

public final double[] getData()

get data array. Only elements 0 to (getCount () - 1) were set by user. Subsequent calls (after enlargement) may return a different array object

append

public void append(double d)

append one double element

setSize

public void setSize(int n)

set number of used array elements (ensures there is enough storage)

clearData

public boolean clearData()

clear the array

Returns:

true if the array was previously non-empty

enlarge

private void enlarge(int newsize)

enlarge the data array to its new size; does not change count_