File	Doc	Category	Size	Date	Package
CollectionUtil.java	API Doc	Glassfish v2 API	3994	Fri May 04 22:31:06 BST 2007	com.sun.appserv.management.util.misc

CollectionUtil

• java.lang.Object

Fields Summary

Constructors Summary
private CollectionUtil() // disallow instantiation

Methods Summary
public static void	addArray(java.util.Collection c, T[] array) Add all items in an array to a set. for( int i = 0; i < array.length; ++i ) { c.add( array[ i ] ); }
public static T	getSingleton(java.util.Collection s) if ( s.size() != 1 ) { throw new IllegalArgumentException(); } return( s.iterator().next() );
public static boolean	isAllStrings(java.util.Collection c) return true if all elements are String, and there is at least one element return IteratorUtil.getUniformClass( c.iterator() ) == String.class;
public static T[]	toArray(java.util.Collection c, java.lang.Class elementClass) param c the Collection param elementClass the type of the element, must be non-primitive return array of [] elements final T[] items = ArrayUtil.newArray( elementClass, c.size() ); c.toArray( items ); return items;
public static java.lang.String	toString(java.util.Collection c, java.lang.String delim) return a String final String[] strings = toStringArray( c ); Arrays.sort( strings ); return StringUtil.toString( delim, (Object[])strings );
public static java.lang.String	toString(java.util.Collection c) return toString( c, ", " );
public static java.lang.String[]	toStringArray(java.util.Collection c) return String[] final String[] strings = new String[ c.size() ]; int i = 0; for( final Object o : c ) { strings[ i ] = SmartStringifier.toString( o ); ++i; } return( strings );