Tutorial 01_java Basic Grammar [experimental task four]

1, the program design idea: Cycle six randomly generated six characters combined into a random string, prompting the input to determine whether two strings are equal

2. Program Flowchart

　　

3. Program source code

1 //Letter 1605-1 Liu Sixiang 201635792 ImportJavax.swing.JOptionPane;3  Public classRandomstr4 {5      Public Static voidMain (string[] args)6     {7         //defining an empty string8String result = "";9String message = "";TenString str = ""; One         //Cycle 6 times A          for(inti = 0; I < 6; i + +) -         { -             //generates an integer of type 97~122 int the             intIntval = (int) (Math.random () * 26 + 97); -             //after casting intvalue to char after connecting to result -result = result + (Char) intval; -         } +          -          while(true)//Enter the verification code +         { Astr = Joptionpane.showinputdialog (NULL, "Please enter the CAPTCHA:" +result, "enter", joptionpane.information_message); at  -             if(Str.equals (Result))//determine if the verification code is correct -             { -Joptionpane.showmessagedialog (NULL, "Verify Success", "Prompt", joptionpane.information_message); -                  Break; -             } in             Else -             { toJoptionpane.showmessagedialog (NULL, "Code input error, please re-enter", "Prompt", joptionpane.warning_message); +             } -         } the      } *}

4. Experimental results

Tutorial 01_java Basic Grammar [experimental task four]