| /* |
| * Copyright (c) 2002, 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 4459133 |
| * @summary Forward reference legal or illegal? |
| * @author gafter |
| * |
| * @compile UseBeforeDeclaration.java |
| */ |
| |
| class UseBeforeDeclaration { |
| static { |
| x = 100; // ok - assignment |
| // int y = ((x)) + 1; // error - read before declaration |
| int v = ((x)) = 3; // ok - x at left hand side of assignment |
| int z = UseBeforeDeclaration.x * 2; // ok - not accessed via simple name |
| Object o = new Object(){ |
| void foo(){x++;} // ok - occurs in a different class |
| {x++;} // ok - occurs in a different class |
| }; |
| } |
| { |
| j = 200; // ok - assignment |
| // j = j + 1; // error - right hand side reads before declaration |
| // int k = j = j + 1; // error - right hand side reads before declaration |
| int n = j = 300; // ok - j at left hand side of assignment |
| // int h = j++; // error - read before declaration |
| int l = this.j * 3; // ok - not accessed via simple name |
| Object o = new Object(){ |
| void foo(){j++;} // ok - occurs in a different class |
| { j = j + 1;} // ok - occurs in a different class |
| }; |
| } |
| int w = x= 3; // ok - x at left hand side of assignment |
| int p = x; // ok - instance initializers may access static fields |
| static int u = (new Object(){int bar(){return x;}}).bar(); // ok - occurs in a different class |
| static int x; |
| int m = j = 4; // ok - j at left hand side of assignment |
| int o = (new Object(){int bar(){return j;}}).bar(); // ok - occurs in a different class |
| int j; |
| } |