instantiate a class without throwing a exception - Java Reflection

Java examples for Reflection:Class

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Description

instantiate a class without throwing a exception

Demo Code


import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Main{
    public static void main(String[] argv) throws Exception{
        Class clazz = String.class;
        System.out.println(instantiateClass(clazz));
    }//from w  w  w  .java  2  s  .c o m
    /**
     * instantiate a class without throwing a exception
     * 
     * @param <T>
     * @param clazz
     * @return
     * @throws WrappedRuntimeException
     */
    public static <T> T instantiateClass(final Class<T> clazz)
            throws WrappedRuntimeException {
        try {
            T result = clazz.newInstance();
            return result;
        } catch (Exception e) {
            throw new WrappedRuntimeException(e);
        }

    }
    @SuppressWarnings("unchecked")
    public static <T> T instantiateClass(final String clazzName)
            throws WrappedRuntimeException {

        Class<T> clazz;
        try {
            clazz = (Class<T>) Class.forName(clazzName);
        } catch (ClassNotFoundException e) {
            throw new WrappedRuntimeException(e);
        }
        return instantiateClass(clazz);
    }
}

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