20 lines
646 B
Java
20 lines
646 B
Java
import java.lang.String;
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record Point(int x, int y) {}
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interface Shape {}
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record ColoredPoint(Point pt, String color) {}
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record Rectangle(ColoredPoint upperLeft, ColoredPoint lowerRight) implements Shape {}
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sealed class Color permits Blue, Red {}
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class Blue extends Color {}
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class Red extends Color {}
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class PatternMatching {
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void printColorOfUpperLeftPoint(Shape shape)
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{
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switch (shape) {
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case Rectangle(ColoredPoint(Point pt, String color), ColoredPoint lowerRight) -> System.out.println("x: " + pt.x() + " / color: " + color + " / lowerRight: " + lowerRight);
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default -> System.out.println("not a rectangle");
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};
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}
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}
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