Java Class forName forName(String className, Class instanceOfClass)

Description

for Name

License

Apache License

Parameter

Parameter	Description
T	a parameter
className	a parameter
instanceOfClass	a parameter

Return

the class object for a given class name

Declaration

@SuppressWarnings("unchecked")
public static <T> Class<T> forName(String className, Class<T> instanceOfClass) 

Method Source Code

//package com.java2s;
/**/*from  w  w  w  .j a  v a 2  s  .  co  m*/
 * Copyright 2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    /**
     * 
     * @param <T>
     * @param className
     * @param instanceOfClass
     * @return the class object for a given class name
     */
    @SuppressWarnings("unchecked")
    public static <T> Class<T> forName(String className, Class<T> instanceOfClass) {
        try {
            Class<?> loadedClass = Class.forName(className);
            if (!instanceOfClass.isAssignableFrom(loadedClass)) {
                throw new IllegalStateException(
                        "Class " + className + " does not implement " + instanceOfClass.getName());
            }
            return (Class<T>) loadedClass;
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }
    }
}

Related

1. forName(String className)
2. forName(String className)
3. forName(String className)
4. forName(String className)
5. forName(String className)
6. forName(String className, Class superType)
7. forName(String className, Class xface)
8. forName(String className, ClassLoader classLoader)
9. forName(String className, ClassLoader defaultClassLoader)