Java EnumSet Create fromString(Class enumType, String value)

Description

from String

License

Open Source License

Parameter

Parameter	Description
enumType	the type of enum
value	a space separated list of enum value strings
E	the enum type

Return

a set of enum values

Declaration

public static <E extends Enum<E>> Set<E> fromString(Class<E> enumType, String value) 

Method Source Code

//package com.java2s;
/******************************************************************************* 
 * Copyright (c) 2013 Red Hat, Inc. //w  w  w.  j  ava  2 s  .co m
 *  All rights reserved. 
 * This program is made available under the terms of the 
 * Eclipse Public License v1.0 which accompanies this distribution, 
 * and is available at http://www.eclipse.org/legal/epl-v10.html 
 * 
 * Contributors: 
 * Red Hat, Inc. - initial API and implementation 
 *
 ******************************************************************************/

import java.util.EnumSet;
import java.util.HashSet;
import java.util.Set;
import java.util.StringTokenizer;

public class Main {
    /**
     * @param enumType the type of enum
     * @param value a space separated list of enum value strings
     * @param <E> the enum type
     * @return a set of enum values
     */
    public static <E extends Enum<E>> Set<E> fromString(Class<E> enumType, String value) {
        final Set<E> enumValues = new HashSet<E>();
        final StringTokenizer tokens = value == null ? null : new StringTokenizer(value);
        if (tokens == null || !tokens.hasMoreTokens()) {
            return EnumSet.noneOf(enumType);
        }
        for (; tokens.hasMoreTokens();) {
            try {
                final E enumValue = Enum.valueOf(enumType, tokens.nextToken());
                if (enumValue != null) {
                    enumValues.add(enumValue);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return enumValues.isEmpty() ? null : EnumSet.copyOf(enumValues);
    }
}

Related

1. asSet(E[] array)
2. createEnumSet(Class elementType)
3. enumFromSet(EnumSet theSet)
4. enumSet(T... elements)
5. enumSetOf(long bitSet, Class eClass)
6. fromString(Class enumClass, String name)
7. intToEnumSet(Class enumClass, int decoded)
8. newEnumSet(Class klass)
9. noneOf( Class elementType)