listoflisttest.java

是一款用JAVA 编写的编译器 具有很强的编译功能

/*
 * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/*
 * @test
 * @bug 4915435
 * @summary NullPointerError in Resolve.findMethod() with foreach vs generics
 * @author gafter
 *
 * @compile -source 1.5 ListOfListTest.java
 * @run main ListOfListTest
 */

import java.util.List;
import java.util.ArrayList;

public class ListOfListTest {

    public static void main(String[] argv) {
	List<List<Integer>> ll = new ArrayList<List<Integer>>();
	List<Integer> il = new ArrayList<Integer>();
	ll.add(il);
	il.add(1);
	int sum = 0;
	for (Integer i : ll.get(0)) {
	    sum = identity(sum) + i;
	}

	if (sum != 1) throw new Error(""+sum);

	enumsToo();
    }

    static int identity(Integer i) {
	switch (i) {
	case 0: return 0;
	default: return i;
	}
    }

    enum E { a, b, c, d, e };

    static class Box<T> {
	Box(T t) { this.t = t; }
	T t;
	T get() { return t; }
    }

    static void enumsToo() {
	Box<E> box = new Box<E>(E.c);
	switch (box.get()) {
	case a: throw new Error();
	case c: break;
	default: throw new Error();
	}
	Box<Integer> boxi = new Box<Integer>(12);
	switch (boxi.get()) {
	case 0: throw new Error();
	case 12: break;
	default: throw new Error();
	}
    }
}