### Question:
Distance { public static double getSquaredDistanceToLine( final double pFromX, final double pFromY, final double pAX, final double pAY, final double pBX, final double pBY ) { return getSquaredDistanceToProjection(pFromX, pFromY, pAX, pAY, pBX, pBY, getProjectionFactorToLine(pFromX, pFromY, pAX, pAY, pBX, pBY)); }  static double getSquaredDistanceToPoint(
            final double pFromX, final double pFromY, final double pToX, final double pToY); static double getSquaredDistanceToLine(
            final double pFromX, final double pFromY,
            final double pAX, final double pAY, final double pBX, final double pBY
    ); static double getSquaredDistanceToSegment(
            final double pFromX, final double pFromY,
            final double pAX, final double pAY, final double pBX, final double pBY
    ); static double getSquaredDistanceToProjection(
            final double pFromX, final double pFromY,
            final double pAX, final double pAY, final double pBX, final double pBY,
            final double pProjectionFactor
    ); static double getProjectionFactorToLine(
            final double pFromX, final double pFromY,
            final double pAX, final double pAY, final double pBX, final double pBY
    ); static double getProjectionFactorToSegment(
            final double pFromX, final double pFromY,
            final double pAX, final double pAY, final double pBX, final double pBY
    );  }### Answer:
@Test public void test_getSquareDistanceToLine() { final int xA = 100; final int yA = 200; final int deltaX = 10; final int deltaY = 20; Assert.assertEquals(0, Distance.getSquaredDistanceToLine(xA, yA, xA, yA, xA, yA), mDelta); Assert.assertEquals(deltaX * deltaX, Distance.getSquaredDistanceToLine(xA, yA, xA + deltaX, yA, xA + deltaX, yA), mDelta); Assert.assertEquals(deltaY * deltaY, Distance.getSquaredDistanceToLine(xA, yA, xA, yA + deltaY, xA, yA + deltaY), mDelta); Assert.assertEquals(20 * 20, Distance.getSquaredDistanceToLine(xA, yA + 20, xA, yA, xA + 100, yA), mDelta); Assert.assertEquals(30 * 30, Distance.getSquaredDistanceToLine(xA - 10, yA - 30, xA, yA, xA + 100, yA), mDelta); Assert.assertEquals(70 * 70, Distance.getSquaredDistanceToLine(xA + 200, yA - 70, xA, yA, xA + 100, yA), mDelta); Assert.assertEquals(7000 * 7000, Distance.getSquaredDistanceToLine(xA + 200, yA - 7000, xA, yA, xA + 200, yA), mDelta); Assert.assertEquals(7000 * 7000, Distance.getSquaredDistanceToLine(xA + 200, yA - 7000, xA, yA, xA + 1000, yA), mDelta); }