import javax.swing.JOptionPane;
public class circle {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String input;
int radius;
String result;
int number1;
int number2;
input=JOptionPane.showInputDialog("请输入圆的半径");
radius=Integer.parseInt(input);
result="圆的直径是"+(2*radius)+" ; "+"圆的面积是"+(Math.PI*radius*radius)+" ;"+"圆的周长是"+(2*Math.PI *radius);
JOptionPane.showConfirmDialog(null, result,"结果的显示",https://www.wendangku.net/doc/3f14044134.html,RMATION_MESSAGE);
System.exit(0);
}
}