Java Reflection Primitive createDefaultPrimitive(Class type)

Description

Returns the default value (JLS 4.12.5) of a primitive type.

License

Open Source License

Parameter

Parameter	Description
type	a primitive wrapper class

Return

an object wrapping 0, null, false, ...

Declaration

public static <K> K createDefaultPrimitive(Class<K> type) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2010-2015 Torsten Hildebrandt and jasima contributors
 *
 * This file is part of jasima, v1.2./*from   w  w  w.  jav  a2s.co  m*/
 *
 * jasima is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * jasima is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with jasima.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/

import java.util.HashMap;

public class Main {
    private static final HashMap<Class<?>, Object> PRIMITIVE_DEFAULTS = new HashMap<Class<?>, Object>();

    /**
     * Returns the default value (JLS 4.12.5) of a primitive type.
     * 
     * @param type
     *            a primitive wrapper class
     * @return an object wrapping 0, null, false, ...
     */
    public static <K> K createDefaultPrimitive(Class<K> type) {
        return type.cast(PRIMITIVE_DEFAULTS.get(type));
    }
}

Related

1. convertPrimitiveToObjectClass(Class clazz)
2. convertPrimitiveToWrapper(Class clazz)
3. convertPrimitiveToWrapper(Class clazz)
4. convertToPrimitive(Class type)
5. convertWrapperToPrimitive(Class clazz)
6. getBENameByPrimitiveClassName( String implementClassName)
7. getDefaultPrimitiveValue(Class clazz)
8. getDefaultValue(Class primitive)
9. getDefaultValueForPrimitive(Class type)