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Wind.java
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20 lines (18 loc) · 441 Bytes
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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
}
} ///:~