要使用Java求任意兩點之間的距離，可以使用以下步驟：

1. 創建一個名為Point的類，該類表示一個點。該類應該包含x和y兩個屬性，并提供相應的getter和setter方法。

public class Point {
    private double x;
    private double y;

    public Point(double x, double y) {
        this.x = x;
        this.y = y;
    }

    public double getX() {
        return x;
    }

    public void setX(double x) {
        this.x = x;
    }

    public double getY() {
        return y;
    }

    public void setY(double y) {
        this.y = y;
    }
}

2. 創建一個名為DistanceCalculator的類，該類包含一個靜態方法calculateDistance，用于計算兩點之間的距離。該方法接受兩個Point對象作為參數，并返回一個double類型的距離值。

public class DistanceCalculator {
    public static double calculateDistance(Point point1, Point point2) {
        double xDiff = point2.getX() - point1.getX();
        double yDiff = point2.getY() - point1.getY();
        return Math.sqrt(xDiff * xDiff + yDiff * yDiff);
    }
}

3. 在主程序中，創建兩個Point對象，然后調用DistanceCalculator的靜態方法來計算它們之間的距離。

public class Main {
    public static void main(String[] args) {
        Point point1 = new Point(1, 2);
        Point point2 = new Point(3, 4);

        double distance = DistanceCalculator.calculateDistance(point1, point2);
        System.out.println("Distance between point1 and point2: " + distance);
    }
}

上述代碼將輸出"Distance between point1 and point2: 2.8284271247461903"，表示兩點之間的距離為2.8284271247461903。