constructoraccess.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 125 行

/*
 * Copyright 1998 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 4116460
 * @summary Test access methods for private constructors.
 * @author William Maddox (maddox)
 *
 * @compile ConstructorAccess.java
 * @run main ConstructorAccess
 */

public class ConstructorAccess {
    int i = 0;
    char c = 'x';

    private ConstructorAccess() {
	this.i = 42;
    }

    private ConstructorAccess(int i, char c) {
	this.i = i;
	this.c = c;
    }

    class Inner {
	int j;
	char c;
	boolean b;

	private Inner() {
	    this.j = 0;
	    this.b = false;
	    this.c = 'x';
	}
	private Inner(int i, char c) {
	    this.j = i;
	    this.b = true;
	    this.c = c;
	    ConstructorAccess.this.i = i;
	}
	private Inner(int i, boolean b) {
	    this.j = i;
	    this.b = b;
	    this.c = 'x';
	}
	void foo() throws Exception {
	    ConstructorAccess x = new ConstructorAccess();
	    if (x.i != 42 || x.c != 'x') {
		throw new Exception("error 1");
	    }
	    ConstructorAccess y = new ConstructorAccess(555, 'y');
	    if (y.i != 555 || y.c != 'y') {
		throw new Exception("error2");
	    }
	}
	void check(int j, char c, boolean b) throws Exception {
	    if (this.j != j || this.c != c || this.b != b) {
		throw new Exception("error3");
	    }
	}
    }

    void bar() throws Exception {
	Inner x = new Inner();
	x.check(0, 'x', false);
	x.foo();
	Inner y = new Inner(747, 'z');
	y.check(747, 'z', true);
	if (this.i != 747) {
	    throw new Exception("error 4");
	}
	Inner z = new Inner(777, true);
	z.check(777, 'x' , true);
    }

    class InnerSub extends Inner {
	private InnerSub() {
	    super();
	}
	private InnerSub(int i) {
	    super(i, 'w');
	}
	private InnerSub(int i, boolean b) {
	    super(i, b);
	}
    }

    public static void main(String[] args) throws Exception {
	ConstructorAccess o = new ConstructorAccess();
	o.bar();
	InnerSub x = o.new InnerSub();
	x.check(0, 'x', false);
	x.foo();
	InnerSub y = o.new InnerSub(767);
	y.check(767, 'w', true);
	if (o.i != 767) {
	    throw new Exception("error 5");
	}
	InnerSub z = o.new InnerSub(777, true);
	z.check(777, 'x' , true);
    }
}