Exercise02

Exercise02_15

 1 import javax.swing.JOptionPane;
 2 public class Distance {
 3     public static void main(String[] args){
 4         String number;
 5         double x1,x2,y1,y2,distance;
 6         number=JOptionPane.showInputDialog(null,"输入x1"); 
 7         x1=Double.parseDouble(number);
 8         number=JOptionPane.showInputDialog(null,"输入x2"); 
 9         x2=Double.parseDouble(number);
10         number=JOptionPane.showInputDialog(null,"输入y1"); 
11         y1=Double.parseDouble(number);
12         number=JOptionPane.showInputDialog(null,"输入y2"); 
13         y2=Double.parseDouble(number);
14         distance=Math.pow((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1), 0.5);
15         int messageType=JOptionPane.INFORMATION_MESSAGE;
16         String message="The distance between the two points is " + distance;
17         JOptionPane.showMessageDialog(null,message,"result",messageType);
18         
19     }
20 }