edu.wisc.game.util.Util

public class Util
extends Object

Auxiliary methods for manipulating hash tables etc

Constructor Summary

Constructors

Constructor Description

Util()

Method Summary

Modifier and Type	Method	Description
`static boolean`	`anySet(boolean[] w)`	Is any value set?
`static HashMap<String,String>`	`array2map(String[] a)`	Converts an array into a hash map.
`static HashSet<String>`	`array2set(String... a)`	Can also take String[] a
`static <T> Vector<T>`	`array2vector(T... a)`
`static String`	`cap1(String s)`	Capitalizes the first character of a string
`static <T> HashSet<String>`	`eachToString(Collection<T> v)`
`static boolean`	`foundAny(String text, String[] keywords)`
`static boolean`	`foundAnyWordStart(String text, String[] keywords)`
`static <T> String`	`join(String sep, Vector<T> v)`
`static <T> String`	`join(String sep, T[] x)`
`static <T> String`	`joinNonBlank(String sep, double[] z)`
`static <T> String`	`joinNonBlank(String sep, int[] z)`
`static <T> String`	`joinNonBlank(String sep, NumberFormat fmt, double[] z)`
`static <T> String`	`joinNonBlank(String sep, Collection<T> v)`	Only uses non-null non-blank strings
`static <T> String`	`joinNonBlank(String sep, T[] z)`
`static String`	`plural(String x, int n)`	"cow" -> "cows"
`static String`	`readTextFile(File f)`	Reads an entire text file into a string
`static <T> T[]`	`reverseArray(T[] x)`	Creates a new array containing the same elements as x, but in reversed order.
`static String`	`roman(int n)`	Converting to a roman numeral
`static boolean`	`same(Object a, Object b)`	Returns true if both objects are non-nulls and equals() return true, or if both are nulls.
`static String`	`stackToString(Exception ex)`
`static boolean`	`startsWithAny(String text, String[] keywords)`
`static BitSet`	`toBitSet(Collection<Integer> v)`	Converts a vector of integers to a BitSet
`static void`	`writeTextFile(File f, String data)`	Writes a string into a new text file

Methods inherited from class java.lang.Object

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

Constructor Details
- Util
  
  public Util()
Method Details
- array2map
  
  public static HashMap<String,String> array2map(String[] a)
  
  Converts an array into a hash map. This is used because Java, unlike Perl, does not have an easy-to-use literal to initialize a hash map.
  
  Parameters:
  
  a - An array with the content (key1, val1, key2, val2, ...)
- array2set
  
  public static HashSet<String> array2set(String... a)
  
  Can also take String[] a
- array2vector
  
  public static <T> Vector<T> array2vector(T... a)
- joinNonBlank
  
  public static <T> String joinNonBlank(String sep, Collection<T> v)
  
  Only uses non-null non-blank strings
- joinNonBlank
  
  public static <T> String joinNonBlank(String sep, T[] z)
- joinNonBlank
  
  public static <T> String joinNonBlank(String sep, int[] z)
- joinNonBlank
  
  public static <T> String joinNonBlank(String sep, double[] z)
- joinNonBlank
  
  public static <T> String joinNonBlank(String sep, NumberFormat fmt, double[] z)
- join
  
  public static <T> String join(String sep, Vector<T> v)
- join
  
  public static <T> String join(String sep, T[] x)
- foundAny
  
  public static boolean foundAny(String text, String[] keywords)
- foundAnyWordStart
  
  public static boolean foundAnyWordStart(String text, String[] keywords)
- startsWithAny
  
  public static boolean startsWithAny(String text, String[] keywords)
- reverseArray
  
  public static <T> T[] reverseArray(T[] x)
  
  Creates a new array containing the same elements as x, but in reversed order. We can't use new T[x.length] ("generic array creation"), but we can piggyback on Arrays.copyOf()!
- plural
  
  public static String plural(String x, int n)
  
  "cow" -> "cows"
- roman
  
  public static String roman(int n)
  
  Converting to a roman numeral
  
  Returns:
  
  a lowercase Roman numeral, e.g. "mcmxli" for 1941
- same
  
  public static boolean same(Object a, Object b)
  
  Returns true if both objects are non-nulls and equals() return true, or if both are nulls.
- readTextFile
  
  public static String readTextFile(File f) throws IOException
  
  Reads an entire text file into a string
  
  Throws:
  
  IOException
- writeTextFile
  
  public static void writeTextFile(File f, String data) throws IOException
  
  Writes a string into a new text file
  
  Throws:
  
  IOException
- cap1
  
  public static String cap1(String s)
  
  Capitalizes the first character of a string
- anySet
  
  public static boolean anySet(boolean[] w)
  
  Is any value set?
  
  Returns:
  
  The "OR" of all elements
- toBitSet
  
  public static BitSet toBitSet(Collection<Integer> v)
  
  Converts a vector of integers to a BitSet
  
  Returns:
  
  A BitSet with bit i set for every i in v.
- eachToString
  
  public static <T> HashSet<String> eachToString(Collection<T> v)
- stackToString
  
  public static String stackToString(Exception ex)

Class Util

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Details

Method Details