animation - Drawing Concentric Circles, appearing one at a time, Java -

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i'm trying draw concentric circles appear 1 @ time, smallest largest outward. i'm wanting give illusion of circle expanding, adding additional circle outside of existing outer circle each time loop executes. @ moment circles appear @ same time when run program. please help, have no idea how this. in advance.

public static void drawcircles(graphics g) {     int radius = 10;     int x = 0;     while(x <= 10) {         int z = radius / 2;         g.drawoval(100 - z, 100 - z, radius, radius);           x++;           radius = radius + 10;      } }

to pause program between circle draws add call thread.sleep(long millis) millis number of milliseconds want pause.

public static void drawcircles(graphics g) {   int radius = 10;   int x = 0;   while(x <= 10) {     int z = radius / 2;     g.drawoval(100 - z, 100 - z, radius, radius);                   try {       thread.sleep(1000);     } catch (interruptedexception e) {      }     x++;     radius = radius + 10;   } }

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