小编use*_*703的帖子

JCheckBox检查但是当我使用system.out.print时它仍然显示其值为false.如果焦点丢失但JCheckBox仍然检查,则返回true.即,当我选中2复选框时,结果显示是第一个复选框.未显示第二个复选框的状态.完成编程如下所示:请运行编程并纠正我的错误.欢迎任何帮助.

public class check extends JFrame {

    public check() {
        setBounds(00, 40, 400, 400);
        Color c = new Color(160, 200, 100);
        getContentPane().setBackground(c);
        Color c3 = new Color(0, 50, 50, 2);
        setTitle("MARKING OF TARGET HABITATION");
        setUndecorated(true);
        getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        String[] columnNames = {"Country", "Capital", "Population in Millions",
            "Democracy"};
        Object[][] data = {
            {"USA", "Washington DC", 280, new Boolean(false)},
            {"Canada", "Ottawa", 32, new Boolean(false)},
            {"United Kingdom", "London", 60, new Boolean(false)},
            {"Germany", "Berlin", 83, new Boolean(false)},
            {"France", "Paris", 60, new Boolean(false)}, …