使用记录模式（Record Patterns）增强Java编程语言，以解构记录值。可以嵌套记录模式和类型模式，以实现功能强大、声明性和可组合形式的数据导航和处理。

public class RecordTest {
    
    public static void main(String[] args) {
        Points points = new Points(1, 2);
        Line line = new Line(new Points(1, 2), new Points(3, 4));
        printPoints(points);
        printLine(line);
    }

    record Points(int x, int y) {}
    record Line(Points from, Points to) {}
    
    private static void printPoints(Object object) {
        if (object instanceof Points(int x, int y)) {
            System.out.println("jdk 19 object is a position, x = " + x + ", y = " + y);
        }
        if (object instanceof Points points) {
            System.out.println("pre jdk 19 object is a position, x = " + points.x()
                               + ", y = " + points.y());
        }
        switch (object) {
            case Points position -> System.out.println("pre jdk 19 object is a position, x = " + position.x() + ", y = " + position.y());
            default -> throw new IllegalStateException("Unexpected value: " + object);
        }
        switch (object) {
            case Points(int x, int y) -> System.out.println(" jdk 19 object is a position, x = " + x + ", y = " + y);
            default -> throw new IllegalStateException("Unexpected value: " + object);
        }

    }
    public static void printLine(Object object) {
        if (object instanceof Line(Points(int x1, int y1), Points(int x2, int y2))) {
            System.out.println("object is a path, x1 = " + x1 + ", y1 = " + y1
                               + ", x2 = " + x2 + ", y2 = " + y2);
        }
        switch (object) {
            case Line(Points(int x1, int y1), Points(int x2, int y2)) ->
                    System.out.println("object is a path, x1 = " + x1 + ", y1 = " + y1
                                       + ", x2 = " + x2 + ", y2 = " + y2);
            // other cases ...
            default -> throw new IllegalStateException("Unexpected value: " + object);
        }
    }

}