|
Java example source code file (WrappedNull.java)
The WrappedNull.java Java example source code/* * Copyright (c) 1999, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * @test * @bug 4189641 * @summary Wrapping a null collection/array should blow up sooner * rather than later */ import java.util.*; public class WrappedNull { public static void main(String argv[]) throws Exception { boolean testSucceeded = false; try{ List l = Arrays.asList(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("Arrays.asList"); testSucceeded = false; try{ Collection c = Collections.unmodifiableCollection(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("unmodifiableCollection"); testSucceeded = false; try{ Set c = Collections.unmodifiableSet(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("unmodifiableSet"); testSucceeded = false; try{ List c = Collections.unmodifiableList(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("unmodifiableList"); testSucceeded = false; try{ Map c = Collections.unmodifiableMap(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("unmodifiableMap"); testSucceeded = false; try{ SortedSet c = Collections.unmodifiableSortedSet(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("unmodifiableSortedSet"); testSucceeded = false; try{ SortedMap c = Collections.unmodifiableSortedMap(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("unmodifiableSortedMap"); testSucceeded = false; try{ Collection c = Collections.synchronizedCollection(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("synchronizedCollection"); testSucceeded = false; try{ Set c = Collections.synchronizedSet(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("synchronizedSet"); testSucceeded = false; try{ List c = Collections.synchronizedList(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("synchronizedList"); testSucceeded = false; try{ Map c = Collections.synchronizedMap(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("synchronizedMap"); testSucceeded = false; try{ SortedSet c = Collections.synchronizedSortedSet(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("synchronizedSortedSet"); testSucceeded = false; try{ SortedMap c = Collections.synchronizedSortedMap(null); } catch (NullPointerException e) { testSucceeded = true; } if(!testSucceeded) throw new Exception("synchronizedSortedMap"); // Make sure that non-null arguments don't throw exc. List l = Arrays.asList(new Object[0]); Collection c = Collections.unmodifiableCollection( Collections.EMPTY_SET); Set s = Collections.unmodifiableSet(Collections.EMPTY_SET); l = Collections.unmodifiableList(Collections.EMPTY_LIST); Map m = Collections.unmodifiableMap(Collections.EMPTY_MAP); SortedSet ss = Collections.unmodifiableSortedSet(new TreeSet()); SortedMap sm = Collections.unmodifiableSortedMap(new TreeMap()); c = Collections.synchronizedCollection(Collections.EMPTY_SET); s = Collections.synchronizedSet(Collections.EMPTY_SET); l = Collections.synchronizedList(Collections.EMPTY_LIST); m = Collections.synchronizedMap(Collections.EMPTY_MAP); ss = Collections.synchronizedSortedSet(new TreeSet()); sm = Collections.synchronizedSortedMap(new TreeMap()); } } Other Java examples (source code examples)Here is a short list of links related to this Java WrappedNull.java source code file: |
... this post is sponsored by my books ... | |
#1 New Release! |
FP Best Seller |
Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.
A percentage of advertising revenue from
pages under the /java/jwarehouse
URI on this website is
paid back to open source projects.