t4711570.java

是一款用JAVA 编写的编译器 具有很强的编译功能

/*
 * Copyright 2002 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 4711570
 * @summary generics: problem with methods when type parameter doesn't appear in signature
 * @author gafter
 *
 * @compile -source 1.5 T4711570.java
 */

class T4711570 {
    public static int fi() {
	return fi();
    }
	
    public static void gi() {
	fi();
	gi();
    }
	
    public static <T> int f() {
	return f();
    }
	
    public static <T> void g() {
	f();	// incompatible.types  found: <T>int required: java.lang.Object
	int i = f(); // workaround for f()
	g();	// incompatible.types  found: <T>void required: java.lang.Object
    }
    // required type looks strange
	
    public static <T> void h() {
	g();	// incompatible.types  found: <T>void required: java.lang.Object
    }

    public static <T> int f(T x) {
	return f(x);
    }
	
    public static <T> void g(T x) {
	f(x);
	g(x);	// incompatible.types  found: <T>void required: java.lang.Object
    }
	
    public static <T> void h(T x) {
	g(x);	// works fine now; why not in void g(T x)?
    }
}