java - 在 JFrame 中保存复选框

Question

所以我制作了一个Java程序，并且我的代码中有一个复选框。我希望保存复选框变量以供 JFrame 应用程序下次启动。 我希望在启动时记住“退出启动器支持”变量和“开发人员控制台”复选框。

代码:

import javax.swing.JFrame;

public class Settings {

    /**
     * @wbp.parser.entryPoint
     */


    static void appSettings() {
        JFrame settingsApp = new JFrame();
        settingsApp.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        settingsApp.setAlwaysOnTop(true);
        settingsApp.setResizable(false);
        settingsApp.setVisible(true);
        settingsApp.setTitle("Launcher Settings");
        settingsApp.setSize(350, 500);
        settingsApp.getContentPane().setLayout(new GridLayout(1, 0, 0, 0));

        JPanel panel = new JPanel();
        settingsApp.getContentPane().add(panel);
        SpringLayout sl_panel = new SpringLayout();
        panel.setLayout(sl_panel);

        JLabel lblInfo = new JLabel("This is the settings window for the DevCity13 Launcher.");
        sl_panel.putConstraint(SpringLayout.NORTH, lblInfo, 10, SpringLayout.NORTH, panel);
        sl_panel.putConstraint(SpringLayout.WEST, lblInfo, 10, SpringLayout.WEST, panel);
        panel.add(lblInfo);

        JCheckBox chckbxDevoleperConsole = new JCheckBox("Devoleper Console");
        chckbxDevoleperConsole.setToolTipText("Activate the devoleper console for error/glitch checking.");
        chckbxDevoleperConsole.setEnabled(false);
        sl_panel.putConstraint(SpringLayout.NORTH, chckbxDevoleperConsole, 6, SpringLayout.SOUTH, lblInfo);
        sl_panel.putConstraint(SpringLayout.WEST, chckbxDevoleperConsole, 10, SpringLayout.WEST, panel);
        panel.add(chckbxDevoleperConsole);

        JCheckBox chckbxSupportexit = new JCheckBox("Exit Launcher under Support");
        chckbxSupportexit.setToolTipText("Close the Launcher Window when Support button is pressed.");
        sl_panel.putConstraint(SpringLayout.NORTH, chckbxSupportexit, 6, SpringLayout.SOUTH, chckbxDevoleperConsole);
        sl_panel.putConstraint(SpringLayout.WEST, chckbxSupportexit, 10, SpringLayout.WEST, panel);
        panel.add(chckbxSupportexit);
    }
}

请帮忙...

Answer 1

如果不将值存储在某个地方，您就无法做到这一点，这可能是一个文件，也可能是一个数据库。最简单的方法是写入文件，然后在启动时读回它。

您可以使用 PrintWriter 将数据写入文件，并使用 BufferedReader 读回。这是最简单的方法

    boolean storedExitLauncher;
    boolean storedDevConsole;
    try {
        File dataContiner = new File("data.dat");
        BufferedReader bufferedReader = new BufferedReader(new FileReader(dataContiner));
        storedExitLauncher = Boolean.parseBoolean(bufferedReader.readLine());
        storedDevConsole = Boolean.parseBoolean(bufferedReader.readLine());

    } catch (FileNotFoundException e) {
        storedDevConsole = storedExitLauncher = false;
    } catch (IOException e) {
        throw new RuntimeException(e);
    }

    //do your stuff here
    boolean exitLauncher = false; //save the checkbox data
    boolean devConsole = false; //save checkbox data

    try {
        PrintWriter printWriter = new PrintWriter("data.dat", "UTF-8");
        printWriter.println(exitLauncher);
        printWriter.println(devConsole);
    } catch (FileNotFoundException e) {
        throw new RuntimeException("Cannot save data, it will be lost");
    } catch (UnsupportedEncodingException e) {
        throw new RuntimeException(e);
    }