Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList]
"Administrator"=dword:00000001

 
import java.io.*;

  public class Jamie02 {
   /**
    * @param args
    */
   public static void main(String[] args) throws IOException {

    System.out.println("選擇形狀");
    System.out.print("1.三角形 2.長方形 3.圓形= ");
    BufferedReader br = new
    BufferedReader(new InputStreamReader(System.in));
    String str = br.readLine();
    int C = Integer.parseInt(str);
    if (C>=4){
    System.out.println("輸入錯誤重新啟動");
    }
   
   if (C== 0){
     System.out.println("輸入錯誤請重新啟動!!");
    }
   
   if (C==1){
     System.out.println("請問底為幾公分? ");
     String qwe = br.readLine();
     double D = Double.parseDouble(qwe);
     System.out.println("請問高為幾公分? ");
     String ASD = br.readLine();
     double A = Double.parseDouble(ASD);
     System.out.print("三角形面積為="+D*A/2);
     }
   
   if (C==2){
    System.out.println("請問長為幾公分?");
    String qwe = br.readLine();
    double D = Double.parseDouble(qwe);
    System.out.println("請問寬為幾公分?");
    String ASD = br.readLine();
    double a = Double.parseDouble(ASD);
    System.out.print("長方型面積為="+D*a);
    }
   
   if (C==3){
     System.out.println("請問半徑為幾公分?");
     String qwe = br.readLine();
     double D = Double.parseDouble(qwe);
     System.out.print("圓形面積為="+D*D*3.14);
    }
    }
    }