how to use ultrasonic

Robot.java

/* wot is the ultrasonic sensor
* sends ultrasonic pulses 
* https://i0.wp.com/randomnerdtutorials.com/wp-content/uploads/2013/11/How-ultrasonic-sensor-works.jpg?resize=700%2C470&ssl=1
* this is sample subsystem
*/

import edu.wpi.first.wpilibj.Ultrasonic;

Ultrasonic ultra = new Ultrasonic(1,1); // c ultrasonic sensor which uses DOut 1
    
// the echo pulse and DigitalInput 1 for the trigger pulse
public void robotInit() {
	ultra.setAutomaticMode(true); // turns on automatic mode
}

public double getRange() {
	double range = ultra.getRangeInches(); // reads the range on the ultra. sesnor
	return range;
	// then you measure the things physically
	// and then you check for te range
}