Java program to check if one circle lies inside another circle or not .
import java . io . * ; class GFG { static void circle ( int x1 , int y1 , int x2 , int y2 , int r1 , int r2 ) { int distSq = ( int ) Math . sqrt ( ( ( x1 - x2 ) * ( x1 - x2 ) ) + ( ( y1 - y2 ) * ( y1 - y2 ) ) ) ; if ( distSq + r2 == r1 ) { System . out . println ( " The ▁ smaller ▁ circle ▁ lies ▁ completely " + " ▁ inside ▁ the ▁ bigger ▁ circle ▁ with ▁ " + " touching ▁ each ▁ other ▁ " + " at ▁ a ▁ point ▁ of ▁ circumference . ▁ " ) ; } else if ( distSq + r2 < r1 ) { System . out . println ( " The ▁ smaller ▁ circle ▁ lies ▁ completely " + " ▁ inside ▁ the ▁ bigger ▁ circle ▁ without " + " ▁ touching ▁ each ▁ other ▁ " + " at ▁ a ▁ point ▁ of ▁ circumference . " ) ; } else { System . out . println ( " The ▁ smaller ▁ does ▁ not ▁ lies ▁ inside " + " ▁ the ▁ bigger ▁ circle ▁ completely . " ) ; } }