Precasting in java

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What is mean by precasting in java can any one give me simple example please...

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vinod_javas

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Sep 27th, 2007

Re: Precasting in java

Not sure exactly what you are referring to with "precasting". There is casting

Java Syntax (Toggle Plain Text)
List pointList = new ArrayList();
pointList.add( new Point(0,0) );
Point p = (Point)pointList.get(0); // you must cast Object to Point here
List pointList = new ArrayList();
pointList.add( new Point(0,0) );
Point p = (Point)pointList.get(0); // you must cast Object to Point here

or you can use generics to "pre-cast" and declare the type of collection

Java Syntax (Toggle Plain Text)
List<Point> pointList = new ArrayList<Point>();
pointList.add( new Point(0,0) );
Point p0 = pointList.get(0);  // no need for the cast here
List<Point> pointList = new ArrayList<Point>();
pointList.add( new Point(0,0) );
Point p0 = pointList.get(0);  // no need for the cast here

Is that what you are wondering about?

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