There are two circles C1 with radius r1, central coordinate (x1, y1) and C2 with radius r2 and central coordinate (x2, y2)

 import java.util.Scanner;
public class Main
{
	public static void main(String arg[])
	{
		Scanner in=new Scanner(System.in);
		    System.out.println("Input x1, y1, r1: (numbers are separated by a space)");
			double x1 = in.nextDouble(),y1=in.nextDouble(),r1=in.nextDouble();
			System.out.println("Input x2, y2, r2: (numbers are separated by a space)");
			double x2 = in.nextDouble(),y2=in.nextDouble(),r2=in.nextDouble();
			double l = Math.sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
			if(l>r1+r2)
				System.out.println("Circumference of C1  and C2  intersect");
			else if(r1>l+r2)
				System.out.println("C2  is in C1");
			else if(r2>l+r1)
				System.out.println("C1  is in C2");
			else
				System.out.println("C1 and C2  do not overlap");
		}
}

Sample Output:

Input x1, y1, r1: (numbers are separated by a space)
 5 6 8 7
Input x2, y2, r2: (numbers are separated by a space)
 8 9 5 4
C1 and C2  do not overlap