如何在 JList 中显示数组列表？

Question

我想在 Jlist 中显示 arraylist bikes 中元素的所有详细信息。一段时间以来，我一直在试图弄清楚如何做到这一点，但我就是无法破解它。Jlist 是名为 pnlBikesTab 的面板的一部分。

ArrayList 和 JList

 ArrayList<Bike> bikes = new ArrayList<Bike>();

 JList<String> lstBikes ;

填充数组列表

 public void Intial(){

//Add 12 bikes  

 Bike b1 = new Bike(1, "Mountain", 12, "Not available") ;       

    Bike b2 = new Bike(2, "Road", 10, "Available") ;         

    Bike b3 = new Bike(3, "City", 8, "Available") ; 

    Bike b4 = new Bike(4, "Mountain", 12, "Available") ;   

    Bike b5 = new Bike(5, "Road", 10, "Available") ;    

    Bike b6 = new Bike(6, "City", 8, "Available") ;        

    Bike b7 = new Bike(7, "Mountain", 12, "Available") ;

    Bike b8 = new Bike(8,"Road", 10, "Available") ;

    EBike b9 = new EBike(9, "eBike", 18, "Not available", "Full Power") ;

    EBike b10 = new EBike(10, "eBike", 18, "Available", "Full Power");

    EBike b11 = new EBike(11, "eBike", 14, "Available", "Power Assist") ;

    EBike b12 = new EBike(12, "eBike", 14, "Available", "Power Assist") ;

    bikes.add(b1) ;

    bikes.add(b2) ;

    bikes.add(b3) ;

    bikes.add(b4) ;

    bikes.add(b5) ;

    bikes.add(b6) ;

    bikes.add(b7) ;

    bikes.add(b8) ;

    bikes.add(b9) ;

    bikes.add(b10) ;

    bikes.add(b11) ;

    bikes.add(b12) ;

}

主要的

 public static void main(String[] args){

        BikeNowGUI fr = new BikeNowGUI();

        fr.Intial();

        fr.setTitle("Bikes") ; 

        fr.setLocationRelativeTo(null); //Center frame

        fr.setSize(300, 500);

        fr.setVisible(true);

    }

GUI

public BikeNowGUI(){

        tabs = new JTabbedPane() ; 

        //BikesTab Panel  

        pnlBikesTab = new JPanel() ;

        lblBikes = new JLabel("Bikes") ; 

        pnlBikesTab.add(lblBikes) ;

        lblImages = new JLabel(icons[0]) ;

        pnlBikesTab.add(lblImages) ;

    }

Answer 1

你可以用这个lstBikes = new JList(bikes.toArray());另一件事是，自行车将始终返回尺寸 0，BikeNowGUI因为您BikeNowGUI先调用Initial方法。我建议您将所有代码移至 Initial 方法。