Loads a class from the classloader; If not found, the classloader of the context class specified will be used. - Java Reflection

Java examples for Reflection:Class

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Description

Loads a class from the classloader; If not found, the classloader of the context class specified will be used.

Demo Code

//Licensed under the Apache License, Version 2.0 (the "License");
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String className = "java2s.com";
        Class context = String.class;
        boolean checkParent = true;
        System.out.println(loadClass(className, context, checkParent));
    }//from w w  w.  j  ava  2  s.co m

    /**
     * Loads a class from the classloader; 
     * If not found, the classloader of the {@code context} class specified will be used.
     * If the flag {@code checkParent} is true, the classloader's parent is included in 
     * the lookup.
     */
    static Class<?> loadClass(String className, Class<?> context,
            boolean checkParent) {
        Class<?> clazz = null;
        try {
            clazz = Thread.currentThread().getContextClassLoader()
                    .loadClass(className);
        } catch (ClassNotFoundException e) {
            if (context != null) {
                ClassLoader loader = context.getClassLoader();
                while (loader != null) {
                    try {
                        clazz = loader.loadClass(className);
                        return clazz;
                    } catch (ClassNotFoundException e1) {
                        loader = checkParent ? loader.getParent() : null;
                    }
                }
            }
        }
        return clazz;
    }
}

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