com.qualcomm.robotcore.util

Class Util

java.lang.Object

com.qualcomm.robotcore.util.Util

public class Util
extends java.lang.Object

Various utility methods

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ASCII_RECORD_SEPARATOR
static java.lang.String	LOWERCASE_ALPHA_NUM_CHARACTERS

Constructor Summary

Constructors

Constructor and Description
Util()

Method Summary

Modifier and Type	Method and Description
static byte[]	concatenateByteArrays(byte[] first, byte[] second) Creates a new byte array long enough to hold both byte arrays, then fills them.
static byte[]	concatenateByteArrays(byte[] first, byte[] second, byte[] third)
static java.lang.String	getRandomString(int stringLength, java.lang.String charSet) Get a random string of characters of specified length from a specified character set.
static boolean	isGoodString(java.lang.String string)
static boolean	isPrefixOf(java.lang.String prefix, java.lang.String target) Is 'prefix' an initial substring of 'target'?
static void	sortFilesByName(java.io.File[] files) Sort an array of File objects, by filename
static void	updateTextView(TextView textView, java.lang.String msg)

Methods inherited from class java.lang.Object

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

Field Detail

ASCII_RECORD_SEPARATOR

public static java.lang.String ASCII_RECORD_SEPARATOR

LOWERCASE_ALPHA_NUM_CHARACTERS

public static final java.lang.String LOWERCASE_ALPHA_NUM_CHARACTERS

See Also:

Constant Field Values

Constructor Detail

Util

public Util()

Method Detail

getRandomString

public static java.lang.String getRandomString(int stringLength,
                                               java.lang.String charSet)

Get a random string of characters of specified length from a specified character set.

Parameters:

stringLength - how many characters to randomly choose

charSet - which characters to choose from, given as a string

Returns:

a string

sortFilesByName

public static void sortFilesByName(java.io.File[] files)

Sort an array of File objects, by filename

Parameters:

files - array of File objects

updateTextView

public static void updateTextView(TextView textView,
                                  java.lang.String msg)

concatenateByteArrays

public static byte[] concatenateByteArrays(byte[] first,
                                           byte[] second)

Creates a new byte array long enough to hold both byte arrays, then fills them.

Parameters:

first - byte array

second - byte array

Returns:

new byte array, which contains a concatenation of both byte arrays

concatenateByteArrays

public static byte[] concatenateByteArrays(byte[] first,
                                           byte[] second,
                                           byte[] third)

isPrefixOf

public static boolean isPrefixOf(java.lang.String prefix,
                                 java.lang.String target)

Is 'prefix' an initial substring of 'target'?

Parameters:

prefix - the string prefix to compare

target - the target to compare the prefix against.

Returns:

true if the prefix is at the front of target, false otherwise

isGoodString

public static boolean isGoodString(java.lang.String string)