Answer :
jButton1 Action Performed
double radius,circumference,area;
radius=Double.parseDouble(jTextField1.getText());
circumference=2*3.14*radius;
area=3.14*radius*radius;
jTextField2.setText(circumference);
jTextField3.setText(area);
double radius,circumference,area;
radius=Double.parseDouble(jTextField1.getText());
circumference=2*3.14*radius;
area=3.14*radius*radius;
jTextField2.setText(circumference);
jTextField3.setText(area);