Question

coins = new JPanel();
    coins.setLayout(new GridLayout(0,1));
    ImageIcon tenP1 = new ImageIcon("10p.jpeg");
    tenP = new JButton("", tenP1);
    ImageIcon twentyP1 = new ImageIcon("20p.jpeg");
    twentyP = new JButton("", twentyP1);
    ImageIcon fiftyP1 = new ImageIcon("50p.jpeg");
    fiftyP = new JButton("", fiftyP1);
    ImageIcon pound = new ImageIcon("pound.jpeg");
    onePound = new JButton("", pound);

我的图片图标不显示，我将它们放在同一目录中同名？请帮忙

Answer 1

试试这个：

public static void main(String[] args) {

    JFrame frame = new JFrame("Test image");
    JPanel pane = new JPanel();

    ImageIcon img = new ImageIcon(TestImage.class.getResource("/img.png"));
    ImageIcon img2 = new ImageIcon(TestImage.class.getResource("/img2.png"));
    ImageIcon img3 = new ImageIcon(TestImage.class.getResource("/img3.png"));
    ImageIcon img4 = new ImageIcon(TestImage.class.getResource("/img4.png"));
    ImageIcon img5 = new ImageIcon(TestImage.class.getResource("/img5.png"));`

    JButton testBut = new JButton(img);
    JButton testBut2 = new JButton(img2);
    JButton testBut3 = new JButton(img3);
    JButton testBut4 = new JButton(img4);
    JButton testBut5 = new JButton(img5);

    pane.setLayout(new BorderLayout());
    pane.add(testBut,BorderLayout.NORTH);
    pane.add(testBut2,BorderLayout.WEST);
    pane.add(testBut3,BorderLayout.EAST);
    pane.add(testBut4,BorderLayout.SOUTH);
    pane.add(testBut5,BorderLayout.CENTER);

    frame.add(pane);
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
}

`

Answer 2

好的，谢谢你知道如何在switch语句中使用operator之间的情况，例如case（（hours＆gt; = 0）＆amp;＆amp;＆amp;（hours＆lt; 2））：amount = 0.50就可以了最多2小时50便士; 2至4小时£1; 4至8小时£2; 8至12小时3英镑; 12至24小时£5; - 您可以使用范围创建枚举：

public enum Hours {

U2,2TO4,4TO8,8TO12,12TO24;

}`

Hours value = HOURS.value //只是一个例子，你必须得到一个getter

swicth(value){ case: U2 : /动作

case 2TO4 : /动作

case 4TO8 : /动作

} ..

java imageicon和框架

2 个答案: