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SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by both ImageJ and SCIFIO.

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/*
 * #%L
 * SciJava Common shared library for SciJava software.
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 * Institute of Molecular Cell Biology and Genetics.
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 *    this list of conditions and the following disclaimer.
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// File path shortening code adapted from:
// from: http://www.rgagnon.com/javadetails/java-0661.html

package org.scijava.util;

import java.util.List;

/**
 * Useful methods for working with {@link List}s.
 * 
 * @author Curtis Rueden
 */
public final class ListUtils {

	private ListUtils() {
		// prevent instantiation of utility class
	}

	/** Gets the first element of the given list, or null if none. */
	public static  T first(final List list) {
		if (list == null || list.size() == 0) return null;
		return list.get(0);
	}

}