boxing1.java

来自「是一款用JAVA 编写的编译器 具有很强的编译功能」· Java 代码 · 共 160 行

/*
 * Copyright 2003-2004 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 4869233 4872709 4868735 4921949 4921209 4965701 4934916 4975565 4974939
 * @summary Boxing/unboxing positive unit and regression tests
 * @author gafter
 *
 * @compile -source 1.5 Boxing1.java
 * @run main Boxing1
 */

public class Boxing1 {

    static Boolean _Boolean = true;
    static boolean _boolean = _Boolean;

    static Byte _Byte = (byte)3;
    static byte _byte = _Byte;

    static Character _Character = 'a';
    static char _char = _Character;

    static Short _Short = (short)4;
    static short _short = _Short;

    static Integer _Integer = 5;
    static int _int = _Integer;

    static Long _Long = 12L;
    static long _long = _Long;

    static Float _Float = 1.2f;
    static float _float = _Float;

    static Double _Double = 1.34;
    static double _double = _Double;

    public static void main(String[] args) {
	_Double = _Integer + _Integer + 0.0d;
	if (_Double != 10) throw new Error();

	_Integer = 2;
	_float = _Integer;
	if (_float != 2.0f) throw new Error();

	_int = 12;
	_Float = _int + 0.0f;
	if (_Float != 12.0f) throw new Error();

	_Integer = 8;
	_float = (float)_Integer;
	if (_float != 8.0f) throw new Error();

	_int = 9;
	_Float = (Float)(_int + 0.0f);
	if (_Float != 9.0f) throw new Error();

	if (_Boolean) ; else throw new Error();
	if (!_Boolean) throw new Error();

	if (_Integer >= _Long) throw new Error();

	_Character = 'a';
	String s1 = ("_" + _Character + "_").intern();
	if (s1 != "_a_") throw new Error(s1);

	/* assignment operators don't work; see 4921209 */
	if (_Integer++ != 8) throw new Error();
	if (_Integer++ != 9) throw new Error();
	if (++_Integer != 11) throw new Error();
	if ((_Integer += 3) != 14) throw new Error();
	if ((_Integer -= 3) != 11) throw new Error();

	Integer i = 0;
	i = i + 2;
	i += 2;
	if (i != 4) throw new Error();

        int j = 0;
        j += i;
        if (j != 4) throw new Error();

	Integer a[] = new Integer[1];
	a[0] = 3;
	a[0] += 3;
	if (a[0] != 6) throw new Error();

	Froobie x = new Froobie();
	Froobie y = new Froobie();
	x.next = y;
	x.next.i = 4;
	x.next.i += 4;
	if (--x.next.i != 7) throw new Error();
	if (x.next.i-- != 7) throw new Error();
	if (x.next.i != 6) throw new Error();

	boxIndex();
	boxArray();
    }

    static void boxIndex() {
	String[] a = { "hello", "world" };
	Integer i = 0;
	System.out.println(a[i]);
    }

    static void boxArray() {
	Integer[] a2 = { 0, 1, 2, 3 };
	for (int i : a2)
	    System.out.println(i);
    }

    static class Froobie {
	Froobie next = null;
	Integer i = 1;
    }

    static class Scott {
	Integer i[];
	Integer j[];
	Integer k;

	int q = i[j[k]]++;
    }

    class T4974939 {
        void f() {
            Byte b = 12;
            Byte c = 'a';

            Short s = 'b';
            Short t = 12;

            Character d = 12;
        }
    }
}