get current system time in nanoseconds java
package com.tutorialspoint;
import java.lang.*;
public class SystemDemo {
public static void main(String[] args) {
// returns the current value of the system timer, in nanoseconds
System.out.print("time in nanoseconds = ");
System.out.println(System.nanoTime());
// returns the current value of the system timer, in milliseconds
System.out.print("time in milliseconds = ");
System.out.println(System.currentTimeMillis());
}
}