Question

我有一个JPanel创建可点击的面板网格。我正在尝试在单击面板中的特定网格时添加标签。我试图使用add方法添加代码，但没有添加任何标签。

代码：

<button onclick="myFunction()">Show Snackbar</button>

<div id="snackbar">Some text some message..</div>

<script>
function myFunction() {
    var x = document.getElementById("snackbar")
    x.className = "show";
    setTimeout(function(){ x.className = x.className.replace("show", ""); }, 3000);
}
</script>

Answer 1

刚刚更改为匿名类，然后能够使用setVisible（true）。我添加了一些其他的东西，只是为了让它在我的最终工作。

public class CenterPanel extends JFrame {
static JLabel labelText = new JLabel("SCHEDULED",JLabel.CENTER);

public CenterPanel(int row, int col) {
    this.setSize(row*50,  col*50);
    setLayout(new GridLayout(row, col));
    //setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));

    for (int i = 0; i < row; i++) {
        for (int j = 0; j < col; j++) {
            JPanel pan = new JPanel();



            pan.setEnabled(true);
            pan.setBackground(Color.WHITE);
            pan.setPreferredSize(new Dimension(3, 3));
            pan.setBorder(BorderFactory.createLineBorder(Color.BLACK));
            // an exception to not click the top row and most left column headers
            if (i != 0 && j != 0) {
                pan.addMouseListener(new MouseAdapter() {
                    public void mouseClicked(MouseEvent arg0) {
                        pan.setBackground(Color.RED);
                        pan.add(new JLabel("HIT"));
                        setVisible(true);
                    }
                }); // add a mouse listener to make the panels clickable
            }
            // set names for each panel for later use
            pan.setName("PANEL_" + i + "_" + j);
            add(pan);
            setVisible(true);
        }

    }
}

}

如何在java swing中将文本或标签添加到jpanel网格中

1 个答案: