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Diffstat (limited to 'docs/dist/examples/introduction/CloneablePoint.java')
-rw-r--r-- | docs/dist/examples/introduction/CloneablePoint.java | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/docs/dist/examples/introduction/CloneablePoint.java b/docs/dist/examples/introduction/CloneablePoint.java new file mode 100644 index 000000000..85fa4faf0 --- /dev/null +++ b/docs/dist/examples/introduction/CloneablePoint.java @@ -0,0 +1,42 @@ +/* + +Copyright (c) Xerox Corporation 1998-2002. All rights reserved. + +Use and copying of this software and preparation of derivative works based +upon this software are permitted. Any distribution of this software or +derivative works must comply with all applicable United States export control +laws. + +This software is made available AS IS, and Xerox Corporation makes no warranty +about the software, its performance or its conformity to any specification. + +*/ +package introduction; + +public aspect CloneablePoint { + + declare parents: Point implements Cloneable; + + public Object Point.clone() throws CloneNotSupportedException { + // we choose to bring all fields up to date before cloning. + makeRectangular(); + makePolar(); + return super.clone(); + } + + public static void main(String[] args){ + Point p1 = new Point(); + Point p2 = null; + + p1.setPolar(Math.PI, 1.0); + try { + p2 = (Point)p1.clone(); + } catch (CloneNotSupportedException e) {} + System.out.println("p1 =" + p1 ); + System.out.println("p2 =" + p2 ); + + p1.rotate(Math.PI / -2); + System.out.println("p1 =" + p1 ); + System.out.println("p2 =" + p2 ); + } +} |