Java：使用GridLayout输入矩阵

我正在尝试编写一个可以使用GridLayout输入任意大小的矩阵的函数,但是因为我找不到合适的方法来提取JTextField值以填充’mat’var(参见下面的FIXME) .

    /**
     * @mat: matrix declared in main (e.g: mat[][] = new int[3][3];)
     * @rows: number of matrix rows (e.g: int rows = 3;)
     * @columns: number of matrix columns (e.g: int columns = 3;)
     */
    public static int[][] inputMatrix(int[][] mat, int rows, int columns)
    {
        JPanel panel = new JPanel();     
        panel.setLayout(new GridLayout(rows,columns));

        for (int a=0; a<(rows*columns); a++)
        {
            panel.add(new JTextField(a));
        }

        if (JOptionPane.showConfirmDialog(null, panel, "Enter the matrix", JOptionPane.OK_CANCEL_OPTION)
                                        == JOptionPane.OK_OPTION)
        {
            for(int a=0; a<(rows*columns); a++){
                for(int b=0; b<rows; b++){
                    for(int c=0; c<columns; c++){
                        /* FIXME: find how to extract JTextField values. */
                        mat[b][c] = JTextField.a.getText();
                    }
                }
            }
        }

        return mat;
    }

在此先感谢您的帮助！

解决方法:

>使用JTable而不是GridLayout铺设的JTextField束

要么

>添加putClientProperty并添加identifier Row a Column from GridLayout
>将JTextField放入HashMap
>我会更喜欢putClientProperty(你可以多重播放数字或额外的信息..,单独的putClientProperty数量不会以某种方式减少)
>取决于(不清楚)desing,你可以将ActionListener添加到JTextField(加速器是ENTER键)或DocumentListener

虚拟示例,JButton和ActionListener的代码示例,putClientProperty可从所有方法或添加到JTextField的侦听器访问

在循环

buttons[i][j].putClientProperty("column", i);
buttons[i][j].putClientProperty("row", j);
buttons[i][j].addActionListener(new MyActionListener());

并从ActionListener获取(例如)

public class MyActionListener implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent e) {
        JButton btn = (JButton) e.getSource();
        System.out.println("clicked column " + btn.getClientProperty("column")
                + ", row " + btn.getClientProperty("row"));
}

标签：grid-layout,java,matrix,input,swing
来源： https://codeday.me/bug/20190928/1825882.html