Java Class Load loadClass(String className)

Description

Loads a class by its fully qualified class name.

License

Apache License

Parameter

Parameter	Description
className	Qualified class name

Return

The class or null if no such class exists

Declaration

public static Class loadClass(String className) 

Method Source Code

//package com.java2s;
/*//from  w  w  w . j  a  v  a  2s. c  o  m
 *   Copyright 2007 skynamics AG
 *
 *   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 {
    /**
     * Loads a class by its fully qualified class name.
     *
     * @param className Qualified class name
     *
     * @return The class or null if no such class exists
     */
    public static Class loadClass(String className) {
        return loadClass(className, null);
    }

    /**
     * Loads a class by its fully qualified class name.
     *
     * @param className Qualified class name
     * @param cl The class loader which shall load the class or null for the default loader
     *
     * @return The class or null if no such class exists
     */
    public static Class loadClass(String className, ClassLoader cl) {
        try {
            if (cl == null) {
                // Use the thread loader if no explicit loader defined
                cl = Thread.currentThread().getContextClassLoader();
            }

            if (cl != null) {
                return cl.loadClass(className);
            }

            // Final fallback to the standard loader
            return Class.forName(className);
        } catch (ClassNotFoundException e) {
            return null;
        } catch (NoClassDefFoundError e) {
            return null;
        }
    }
}

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