Solution for "Judging leap Year" program throws exception

This week, in the software testing class at Zhang Yuan, the teacher asked the program to determine if the year the user entered was a leap years. I have given the following code to make the judging condition:

If (year% 400 = = 0)
{
Text2.settext ("Leap Year");
Return
}
if (year%!! = 0 && Year% 4 = = 0)
{
Text2.settext ("Leap Year");
Return
}
Text2.settext ("Not a leap year");
}

The program will throw an exception when the user enters illegally.

^ (*￣ (oo) ￣*) ^ Note:

Illegal input: The English alphabet, does not satisfy the actual number string, controls the character, the punctuation symbol and so on.

Solution:

1. Code implementation:

Import Java.util.Random;

Import javafx.application.Application;
Import Javafx.event.EventHandler;
Import Javafx.scene.Scene;
Import Javafx.scene.control.Button;
Import Javafx.scene.control.TextField;
Import javafx.scene.input.MouseEvent;
Import Javafx.scene.layout.AnchorPane;
Import Javafx.scene.text.Text;
Import Javafx.stage.Stage;


public class Softwaretest extends application{
/**
* @param args
*/
public static void Main (string[] args) {

Softwaretest.launch (args);
}
@Override
public void start (stage stage) throws Exception {
Anchorpane root = new Anchorpane ();

/*final String str1 = "valid";
Final String str2 = "illegal";
User name
Final TextField textfiled1 = new TextField ();
Root.getchildren (). AddAll (textfiled1);
Anchorpane.settopanchor (textfiled1,100.0);
Anchorpane.setleftanchor (textfiled1,100.0);

Text Text1 = new text ();
Text1.settext ("User name");
Root.getchildren (). AddAll (Text1);
Anchorpane.settopanchor (text1,100.0);
Anchorpane.setleftanchor (text1,50.0);

Password
Final TextField textfiled2 = new TextField ();
Root.getchildren (). AddAll (TEXTFILED2);
Anchorpane.settopanchor (textfiled2,150.0);
Anchorpane.setleftanchor (textfiled2,100.0);

Text Text2 = new text ();
Text2.settext ("password");
Root.getchildren (). AddAll (Text2);
Anchorpane.settopanchor (text2,150.0);
Anchorpane.setleftanchor (text2,50.0);

Verification Code
Final TextField textfiled3 = new TextField ();
Root.getchildren (). AddAll (TEXTFILED3);
Anchorpane.settopanchor (textfiled3,200.0);
Anchorpane.setleftanchor (textfiled3,100.0);

Text Text3 = new text ();
Text3.settext ("Verification Code");
Root.getchildren (). AddAll (TEXT3);
Anchorpane.settopanchor (text3,200.0);
Anchorpane.setleftanchor (text3,50.0);

Final text Text4 = new text ();
Root.getchildren (). AddAll (TEXT4);
Anchorpane.settopanchor (text4,200.0);
Anchorpane.setleftanchor (text4,300.0);

Random ran = new random ();
final int a = Ran.nextint (9000) +1000;
Text4.settext (A + "");


Final text text = new text ();
Root.getchildren (). AddAll (text);
Anchorpane.settopanchor (text,100.0);
Anchorpane.setleftanchor (text,300.0);

Button btn = New button ("OK");
Root.getchildren (). AddAll (BTN);
Anchorpane.settopanchor (btn,250.0);
Anchorpane.setleftanchor (btn,100.0);

btn.setonmouseclicked (New eventhandler<mouseevent> () {
public void handle (MouseEvent arg0) {
Boolean judge1 = true;
Boolean judge2 = true;
String s = textfiled1.gettext ();
if ((S.length () > 6) | | (S.length () < 1))
{
Text.settext (STR2);
Return
}


for (int i = 0; i < s.length (); i++)
{
char C = S.charat (i);
if (! ( (c >= ' A ' && C <= ' Z ') | | (c >= ' a ' && c <= ' z ') | | (c >= ' 0 ' && C <= ' 9 ')))
{
Judge1 = false;
Break
}
}

if (!judge1)
{
Text.settext (STR2);
Return
}


s = Textfiled2.gettext ();
if ((S.length () > 6) | | (S.length () < 1))
{
Text.settext (STR2);
Return
}


for (int i = 0; i < s.length (); i++)
{
char C = S.charat (i);
if (! ( (c >= ' A ' && C <= ' Z ') | | (c >= ' a ' && c <= ' z ') | | (c >= ' 0 ' && C <= ' 9 ')))
{
Judge2 = false;
Break
}
}

if (!judge2)
{
Text.settext (STR2);
Return
}


s = Textfiled3.gettext ();
int I=integer.parseint (s);
if (i! = a)
{
Text.settext (STR2);
}
Else
{
Text.settext (STR1);
}

}


});*/

Text Text1 = new text ();
Text1.settext ("Please enter the Year");
Anchorpane.settopanchor (text1,70.0);
Anchorpane.setleftanchor (text1,100.0);
Root.getchildren (). AddAll (Text1);


Final text Text2 = new text ();
Anchorpane.settopanchor (text2,100.0);
Anchorpane.setleftanchor (text2,300.0);
Root.getchildren (). AddAll (Text2);

Final TextField textfiled1 = new TextField ();
Root.getchildren (). AddAll (textfiled1);
Anchorpane.settopanchor (textfiled1,100.0);
Anchorpane.setleftanchor (textfiled1,100.0);

Button btn = New button ("OK");
Root.getchildren (). AddAll (BTN);
Anchorpane.settopanchor (btn,130.0);
Anchorpane.setleftanchor (btn,100.0);


btn.setonmouseclicked (New eventhandler<mouseevent> () {
public void handle (MouseEvent arg0) {
String s = textfiled1.gettext ();
for (int i = 0; i < s.length (); i++)
{
char C = S.charat (i);
if (! ( C >= ' 0 ' && C <= ' 9 '))
{
Text2.settext ("illegal input");
Return
}
}
Int year =integer.parseint (s);
If (year% 400 = = 0)
{
Text2.settext ("Leap Year");
Return
}
if (year%!! = 0 && Year% 4 = = 0)
{
Text2.settext ("Leap Year");
Return
}
Text2.settext ("Not a leap year");
}
});

Stage.setscene (new Scene (root, 500, 500));
Stage.show ();

}

}

2. Test Cases:

Number	Test Cases	Output results
1	2000	Leap
2	1900	Non-leap year
3	1996	Leap
4	1995	Non-leap year
5	Abcd	Illegal input

3. Result diagram:

Solution for "Judging leap Year" program throws exception