Java example source code file (QualifiedThisAndSuper_1.java)
The QualifiedThisAndSuper_1.java Java example source code
/*
* Copyright (c) 1998, 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 4147520
* @summary Verify correct implementation of qualified 'this' and 'super'.
* @author maddox
*
* @run compile QualifiedThisAndSuper_1.java
* @run main QualifiedThisAndSuper_1
*/
public class QualifiedThisAndSuper_1 {
public class AS {
String s = "ass";
private String t = "ast";
protected String u = "asu";
String m() { return "asm"; }
private String n() { return "asn"; }
protected String o() { return "aso"; }
}
public class BS {
String s = "bss";
private String t = "bst";
protected String u = "bsu";
String m() { return "bsm"; }
private String n() { return "bsn"; }
protected String o() { return "bso"; }
}
public class CS {
String s = "css";
private String t = "cst";
protected String u = "csu";
String m() { return "csm"; }
private String n() { return "csn"; }
protected String o() { return "cso"; }
}
void check(String expr, String result, String expected) {
if (!result.equals(expected)) {
throw new Error("Evaluated "+ expr +
" : result " + result + ", expected " + expected);
}
}
public class A extends AS {
A() { super(); }
String s = "as";
private String t = "at";
protected String u = "au";
String m() { return "am"; }
private String n() { return "an"; }
protected String o() { return "ao"; }
public class B extends BS {
B() { super(); }
String s = "bs";
private String t = "bt";
protected String u = "bu";
String m() { return "bm"; }
private String n() { return "bn"; }
protected String o() { return "bo"; }
public class C extends CS {
C() { super(); }
String s = "cs";
private String t = "ct";
protected String u = "cu";
String m() { return "cm"; }
private String n() { return "cn"; }
protected String o() { return "co"; }
void test() {
check("this.m()", this.m(), "cm");
check("A.this.m()", A.this.m(), "am");
check("B.this.m()", B.this.m(), "bm");
check("C.this.m()", C.this.m(), "cm");
check("super.m()", super.m(), "csm");
check("A.super.m()", A.super.m(), "asm");
check("B.super.m()", B.super.m(), "bsm");
check("C.super.m()", C.super.m(), "csm");
// should re-use access methods.
check("A.super.m()", A.super.m(), "asm");
check("B.super.m()", B.super.m(), "bsm");
check("C.super.m()", C.super.m(), "csm");
//---
check("this.n()", this.n(), "cn");
check("A.this.n()", A.this.n(), "an");
check("B.this.n()", B.this.n(), "bn");
check("C.this.n()", C.this.n(), "cn");
check("super.n()", super.n(), "csn");
check("A.super.n()", A.super.n(), "asn");
check("B.super.n()", B.super.n(), "bsn");
check("C.super.n()", C.super.n(), "csn");
// should re-use access methods.
check("A.super.n()", A.super.n(), "asn");
check("B.super.n()", B.super.n(), "bsn");
check("C.super.n()", C.super.n(), "csn");
//---
check("this.o()", this.o(), "co");
check("A.this.o()", A.this.o(), "ao");
check("B.this.o()", B.this.o(), "bo");
check("C.this.o()", C.this.o(), "co");
check("super.o()", super.o(), "cso");
check("A.super.o()", A.super.o(), "aso");
check("B.super.o()", B.super.o(), "bso");
check("C.super.o()", C.super.o(), "cso");
// should re-use access methods.
check("A.super.o()", A.super.o(), "aso");
check("B.super.o()", B.super.o(), "bso");
check("C.super.o()", C.super.o(), "cso");
//---
check("this.s", this.s, "cs");
check("A.this.s", A.this.s, "as");
check("B.this.s", B.this.s, "bs");
check("C.this.s", C.this.s, "cs");
//---
check("this.t", this.t, "ct");
check("A.this.t", A.this.t, "at");
check("B.this.t", B.this.t, "bt");
check("C.this.t", C.this.t, "ct");
//---
check("this.u", this.u, "cu");
check("A.this.u", A.this.u, "au");
check("B.this.u", B.this.u, "bu");
check("C.this.u", C.this.u, "cu");
//---
check("super.s", super.s, "css");
check("A.super.s", A.super.s, "ass");
check("B.super.s", B.super.s, "bss");
check("C.super.s", C.super.s, "css");
//---
check("super.t", super.t, "cst");
check("A.super.t", A.super.t, "ast");
check("B.super.t", B.super.t, "bst");
check("C.super.t", C.super.t, "cst");
//---
check("super.u", super.u, "csu");
check("A.super.u", A.super.u, "asu");
check("B.super.u", B.super.u, "bsu");
check("C.super.u", C.super.u, "csu");
//---
A.this.s = "foo";
System.out.println(A.this.s);
check("A.this.s", A.this.s, "foo");
B.this.s = "bar";
System.out.println(B.this.s);
check("B.this.s", B.this.s, "bar");
C.this.s = "baz";
System.out.println(C.this.s);
check("C.this.s", C.this.s, "baz");
A.this.t = "foo";
System.out.println(A.this.t);
check("A.this.t", A.this.t, "foo");
B.this.t = "bar";
System.out.println(B.this.t);
check("B.this.t", B.this.t, "bar");
C.this.t = "baz";
System.out.println(C.this.t);
check("C.this.t", C.this.t, "baz");
A.this.u = "foo";
System.out.println(A.this.u);
check("A.this.u", A.this.u, "foo");
B.this.u = "bar";
System.out.println(B.this.u);
check("B.this.u", B.this.u, "bar");
C.this.u = "baz";
System.out.println(C.this.u);
check("C.this.u", C.this.u, "baz");
A.super.s = "foo";
System.out.println(A.super.s);
check("A.super.s", A.super.s, "foo");
B.super.s = "bar";
System.out.println(B.super.s);
check("B.super.s", B.super.s, "bar");
C.super.s = "baz";
System.out.println(C.super.s);
check("C.super.s", C.super.s, "baz");
A.super.t = "foo";
System.out.println(A.super.t);
check("A.super.t", A.super.t, "foo");
B.super.t = "bar";
System.out.println(B.super.t);
check("B.super.t", B.super.t, "bar");
C.super.t = "baz";
System.out.println(C.super.t);
check("C.super.t", C.super.t, "baz");
A.super.u = "foo";
System.out.println(A.super.u);
check("A.super.u", A.super.u, "foo");
B.super.u = "bar";
System.out.println(B.super.u);
check("B.super.u", B.super.u, "bar");
C.super.u = "baz";
System.out.println(C.super.u);
check("C.super.u", C.super.u, "baz");
}
}
void test() throws Exception {
C c = new C();
c.test();
}
}
void test() throws Exception {
B b = new B();
b.test();
}
}
public static void main(String[] args) throws Exception {
A a = new QualifiedThisAndSuper_1().new A();
a.test();
}
}
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