Loads a class starting from the given class loader (can be null, then use default class loader) - Java Reflection

Java examples for Reflection:Class Loader

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Description

Loads a class starting from the given class loader (can be null, then use default class loader)

Demo Code


//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String name = "java2s.com";
        System.out.println(forName(name));
    }//w  ww. j a v a 2 s . c om

    /**
     * Loads a class starting from the given class loader (can be null, then use
     * default class loader)
     * 
     * @param loader
     * @param name
     *            of class to load
     * @return
     * @throws ClassNotFoundException
     */
    public static Class forName(final ClassLoader loader, final String name)
            throws ClassNotFoundException {
        Class klass = null;
        if (loader != null) {
            klass = Class.forName(name, false, loader);
        } else {
            klass = Class.forName(name, false,
                    ClassLoader.getSystemClassLoader());
        }
        return klass;
    }

    /**
     * Loads a class from the context class loader or, if that fails, from the
     * default class loader.
     * 
     * @param name
     *            is the name of the class to load.
     * @return a <code>Class</code> object.
     * @throws ClassNotFoundException
     *             if the class was not found.
     */
    public static Class forName(final String name)
            throws ClassNotFoundException {
        Class cls = null;
        try {
            cls = Class.forName(name, false, Thread.currentThread()
                    .getContextClassLoader());
        } catch (Exception e) {
            cls = Class.forName(name);
        }
        return cls;
    }
}

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