Having problem scroll down in android

Support
1

Appium version: 1.4.0.0
OS: Windows 7
I’m using Java for automation with Appium
io.appium.java_client.AppiumDriver
io.appium.java_client.android.AndroidDriver;

I need to scroll to bottom in order to press on the button “Confirm”
i have tried driver.findElement(By.name(“Confirm”)).click(); in order to click the button but need to scroll down in order to detect the element

i used .swipe(0, 0, 0, 10, 500);
scrollToExact(“Confirm”);
scrollTo(“Confirm”);
But none of them is working

Error when use swipe java.lang.NullPointerException