Two small Java programs for practicing Java basic syntax

1, enter two number, to seek its subtraction. Present in the form of a window

1 ImportJavax.swing.JOptionPane;2 3  Public classJJCC {4      Public Static voidMain (string[] args)5     {6 String Firstnumber,secondnumber;7         intNumber1,number2;8         intHe,cha,ji,shang;9Firstnumber =Joptionpane.showinputdialogTen("Input the first integer please"); OneSecondnumber =Joptionpane.showinputdialog A("InOut The second integer please"); -Number1 =Integer.parseint (firstnumber); -Number2 =Integer.parseint (secondnumber); thehe = Number1 +number2; -Cha = number1-number2; -Ji = number1 *number2; -Shang = number1/number2; +Joptionpane.showmessagedialog (NULL, "Number1 + number2 is" -+he+ "\nnumber1-number2 is" +cha+ "\nnumber1 *" ++ "Number2 is" +ji+ "\nnumber1/number2 is" +Shang A, "Results", joptionpane.plain_message); at     } -}

2. Generate a 6-bit random string verification code (in the form of a window) (the number of bits can be changed)

1 ImportJavax.swing.JOptionPane;2 3  Public classRandomstr {4 //Public void Createrandomstr (int weishu)5 //    {6 //String str = "";7 //for (int i=1;i<=weishu;i++)8 //        {9 //            //generates a random number that represents the ASCII of the A~zTen //int intvalue = (int) (Math.random () *26+97); One //            //Converts this random number to its corresponding letter and connects to the back of STR A //str = str + (char) intvalue; - //        } - //    } the  -      Public Static voidMain (string[] args) { -     //generates a 6-bit random string of lowercase letters -         intWeishu=6; +String str = ""; -          for(inti=1;i<=weishu;i++) +         { A             //generates a random number that represents the ASCII of the A~z at             intIntvalue = (int) (Math.random () *26+97); -             //Converts this random number to its corresponding letter and connects to the back of STR -str = str + (Char) Intvalue; -         } -     //random string Generation complete - String inputstr; inInputstr = Joptionpane.showinputdialog ("Please enter the following verification code \ n" +str); -         if(Inputstr.equals (str)) to         { +Joptionpane.showmessagedialog (NULL, "Validation succeeded"); -         } the         Else *         { $Joptionpane.showmessagedialog (NULL, "Sorry, validation failed");Panax Notoginseng         } -     } the  +}

Two small Java programs for practicing Java basic syntax