Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2006, 2014 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Mike Kucera (IBM Corporation) - initial API and implementation
 *     Sergey Prigogin (Google)
 *     Nathan Ridge
 *******************************************************************************/

import java.util.Iterator;
import java.util.List;

public class Main {
    /**
     * Finds the first object in the heterogeneous list that is an instance of 
     * the given class, removes it from the list, and returns it.
     * If there is not object in the list of the given type the list is left
     * unmodified and null is returned.
     * 
     * @throws NullPointerException if list or clazz is null
     * @throws UnsupportedOperationException if the list's Iterator does not support the remove()
     *     method
     */
    @SuppressWarnings("unchecked")
    public static <T> T findFirstAndRemove(List<?> list, Class<T> clazz) {
        for (Iterator<?> iter = list.iterator(); iter.hasNext();) {
            Object o = iter.next();
            if (clazz.isInstance(o)) {
                iter.remove();
                return (T) o; // safe
            }
        }
        return null;
    }
}