How to click/tap on the element by using X and Y coordinate in Appium?

How to click/tap on the element by using X and Y coordinate in Appium? [Up to date: java-client 6.x.x]
If don't have unique ID or any other locator of any element, then we can click on the element by using x and y coordinate. For that we have to fine X and Y coordinate first.
How to find X and Y coordinate from android phone?

• Go to 'Settings'
• Go to 'Developer options' (Additional / Advanced settings > Developer options)
• Enable 'Show taps' and 'Pointer location' (Below the INPUT title)
• For example, we want to automate Calculator app
• Open the Calculator app and tap on the element and collect the X and Y coordinate like below image

Use above X and Y coordinate

int x = 282;
int y = 808;
new TouchAction((AndroidDriver)driver).tap(point(x, y)).perform();