软件测试——闰年测试

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.AnchorPane;
import javafx.scene.text.Text;
import javafx.stage.Stage;


public class test2 extends Application {

    public static void main(String[ ] args) {
        test2.launch( args );
    }
    public void start( Stage primaryStage ) {
        primaryStage.setTitle( "input testing" );
        AnchorPane root = new AnchorPane();
        
        Text text = new Text("请输入测试年份");
        final Text textans1 = new Text("");
        
        final TextField intext1 = new TextField("");
        intext1.setMaxSize(140, 20);    
        AnchorPane.setTopAnchor(text, 40.0);
        AnchorPane.setLeftAnchor(text, 100.0);       
        
        AnchorPane.setTopAnchor(textans1, 120.0);
        AnchorPane.setLeftAnchor(textans1, 70.0);
        
        AnchorPane.setTopAnchor(intext1, 60.0);
        AnchorPane.setLeftAnchor(intext1, 70.0);        
        
        root.getChildren().addAll(text,intext1);  
        root.getChildren().addAll(textans1);
        
        Button btn = new Button("提交");        
        root.getChildren().addAll(btn);
        AnchorPane.setTopAnchor(btn, 90.0);
        AnchorPane.setLeftAnchor(btn, 120.0);
       
        btn.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent arg0) {
                textans1.setText(check(intext1.getText().toString()));     
            }
        });
      
        primaryStage.setScene(new Scene(root,300,200));
        primaryStage.show( );
        }
        
    public String check(String str){
        try{
            int year = Integer.parseInt(str);
            if(year <0)
                return "请输入正确年份"; 
            if(year % 100 ==0){
                if(year % 400 == 0)
                    return str+"是闰年"; 
            }
            else{
                if(year % 4 == 0)
                    return str+"是闰年";
            }    
        }catch(Exception e){
            return "非法输入";
        }

            return str+"不是闰年";
      }
 
}