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//: reusing/Wind.java

package reusing; /* Added by Eclipse.py */

// Inheritance & upcasting.

class Instrument {

public void play() {}

static void tune(Instrument i) {

// ...

i.play();

}

}

// Wind objects are instruments

// because they have the same interface:

public class Wind extends Instrument {

public static void main(String[] args) {

Wind flute = new Wind();

Instrument.tune(flute); // Upcasting

}

} ///:~