Java颜色更改带有计时器的文本。你可以帮忙吗？

Question

我想写每秒改变颜色两次的文本。有人可以告诉我为什么它不起作用吗？如果您能向我解释该怎么做，我将非常高兴。

import java.awt.EventQueue;
import java.awt.Color;
import javax.swing.*;
import java.util.Random;
import java.awt.Font;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.border.BevelBorder;
import javax.swing.border.SoftBevelBorder;

public class test {

    private JFrame frmTest;
    private JTextField textField;
    private JLabel lblNewLabel;
    private JTextField textField_1;
    private JLabel lblNombreUtilisPour;
    private JTextField textField_2;
    private JLabel lblNombreChiffr;
    private JLabel lblNombreDechiffr;
    private JTextField textField_3;
    private JButton btnDehiffrer;
    private JSeparator separator;
    private JTextField textField_4;
    private JButton button;
    private JLabel label;
    private JTextField textField_6;
    private JLabel label_2;
    private JTextField textField_7;
    private JLabel label_3;
    private JButton button_1;

/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                test window = new test();
                window.frmTest.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

    /**
     * Create the application.
     */
public test() {


    initialize();


    }







/**
 * Initialize the contents of the frame.
 */
    private void initialize() {




        Random rand = new Random();
        float r = rand.nextFloat();
        float g = rand.nextFloat();
        float b = rand.nextFloat();

        Color randomColor = new Color(r, g, b);



        frmTest = new JFrame();

        frmTest.setResizable(false);
        frmTest.setTitle("TPE");
        frmTest.setBounds(100, 100, 450, 450);
        frmTest.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frmTest.getContentPane().setLayout(null);

        JLabel label_1 = new JLabel(new ImageIcon("test5.gif"));

        label_1.setForeground(randomColor.brighter());
        frmTest.setContentPane(label_1);




        textField = new JTextField();
        textField.setSelectedTextColor(randomColor.brighter());
        textField.setOpaque(false);
        textField.setForeground(randomColor.brighter());
        textField.setName("");
        textField.setFont(new Font("Tahoma", Font.PLAIN, 14));
        textField.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
        textField.addKeyListener(new KeyAdapter() {
            @Override
            public void keyTyped(KeyEvent e) {

                textField.addKeyListener(new java.awt.event.KeyAdapter() {
                    public void keyTyped(java.awt.event.KeyEvent evt) {

                     if(!(Character.isDigit(evt.getKeyChar()))){
                            evt.consume();
                        }



                    }

                });

            }
        });
        textField.setHorizontalAlignment(SwingConstants.CENTER);
        textField.setToolTipText("Entrer un nombre ici");
        textField.setBounds(215, 32, 219, 20);
        frmTest.getContentPane().add(textField);
        textField.setColumns(10);
        textField.setDocument(new JTextFieldLimit(9));

        lblNewLabel = new JLabel("Entrer un nombre:");
        lblNewLabel.setForeground(randomColor.brighter());
        lblNewLabel.setFont(new Font("Tahoma", Font.PLAIN, 15));
        lblNewLabel.setBounds(10, 30, 141, 20);
        frmTest.getContentPane().add(lblNewLabel);

        textField_1 = new JTextField();
        textField_1.setSelectedTextColor(randomColor.brighter());
        textField_1.setForeground(randomColor.brighter());
        textField_1.setFont(new Font("Tahoma", Font.PLAIN, 14));
        textField_1.setOpaque(false);
        textField_1.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
        textField_1.setHorizontalAlignment(SwingConstants.CENTER);
        textField_1.setToolTipText("Nombre utilisé pour chiffrer: ");
        textField_1.setEditable(false);
        textField_1.setColumns(10);
        textField_1.setBounds(215, 63, 219, 20);
        frmTest.getContentPane().add(textField_1);

        lblNombreUtilisPour = new JLabel("Nombre utilisé pour chiffrer: ");
        lblNombreUtilisPour.setForeground(randomColor.brighter());
        lblNombreUtilisPour.setToolTipText("Nombre utilisé pour chiffrer: ");
        lblNombreUtilisPour.setFont(new Font("Tahoma", Font.PLAIN, 15));
        lblNombreUtilisPour.setBounds(10, 61, 195, 20);
        frmTest.getContentPane().add(lblNombreUtilisPour);

        textField_2 = new JTextField();
        textField_2.setSelectedTextColor(randomColor.brighter());
        textField_2.setForeground(randomColor.brighter());
        textField_2.setFont(new Font("Tahoma", Font.PLAIN, 14));
        textField_2.setOpaque(false);
        textField_2.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
        textField_2.setEditable(false);
        textField_2.setHorizontalAlignment(SwingConstants.CENTER);
        textField_2.setToolTipText("Nombre chiffré: ");
        textField_2.setColumns(10);
        textField_2.setBounds(215, 94, 219, 20);
        frmTest.getContentPane().add(textField_2);

        lblNombreChiffr = new JLabel("Nombre chiffré: ");
        lblNombreChiffr.setForeground(randomColor.brighter());
        lblNombreChiffr.setToolTipText("Nombre chiffré: ");
        lblNombreChiffr.setFont(new Font("Tahoma", Font.PLAIN, 15));
        lblNombreChiffr.setBounds(10, 92, 195, 20);
        frmTest.getContentPane().add(lblNombreChiffr);

        textField_3 = new JTextField();
        textField_3.setSelectedTextColor(randomColor.brighter());
        textField_3.setForeground(randomColor.brighter());
        textField_3.setFont(new Font("Tahoma", Font.PLAIN, 14));
        textField_3.setOpaque(false);
        textField_3.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
        textField_3.setHorizontalAlignment(SwingConstants.CENTER);
        textField_3.setEditable(false);
        textField_3.setToolTipText("Nombre dechiffré: ");
        textField_3.setColumns(10);
        textField_3.setBounds(215, 125, 219, 20);
        frmTest.getContentPane().add(textField_3);

        lblNombreDechiffr = new JLabel("Nombre dechiffré: ");
        lblNombreDechiffr.setForeground(randomColor.brighter());
        lblNombreDechiffr.setToolTipText("Nombre dechiffré: ");
        lblNombreDechiffr.setFont(new Font("Tahoma", Font.PLAIN, 15));
        lblNombreDechiffr.setBounds(10, 125, 151, 20);
        frmTest.getContentPane().add(lblNombreDechiffr);

        btnDehiffrer = new JButton("Dechiffrer");
        btnDehiffrer.setHorizontalTextPosition(SwingConstants.CENTER);
        btnDehiffrer.setBorder(null);
        btnDehiffrer.setContentAreaFilled(false);
        btnDehiffrer.addActionListener(new ActionListener()  {

            public void actionPerformed(ActionEvent e) {


                int min = 0;
                int max = 250;

                Random r = new Random();

                //Demande de nombre 
                int nmb = Integer.parseInt(textField.getText());

                //Chifrement

                int chif = r.nextInt(max-min) * r.nextInt(max-min) + r.nextInt(max-min) / r.nextInt(max-min);

                int chif_nmb = nmb * chif;
                int dechif_nmb = chif_nmb / chif;

                textField_3.setText(""+dechif_nmb);





            }
        });



        JButton btnButton1 = new JButton("Chiffrer");
        btnButton1.setHorizontalTextPosition(SwingConstants.CENTER);
        btnButton1.setContentAreaFilled(false);
        btnButton1.setBorder(null);
        btnButton1.setOpaque(false);
        btnButton1.setToolTipText("Chiffrer");
        btnButton1.setFont(new Font("Tahoma", Font.PLAIN, 16));
        btnButton1.setForeground(randomColor.brighter());
        btnButton1.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {


                int min = 0;
                int max = 250;

                Random r = new Random();

                //Demande de nombre 
                int nmb = Integer.parseInt(textField.getText());

                //Chifrement

                int chif = r.nextInt(max-min) * r.nextInt(max-min) + r.nextInt(max-min) / r.nextInt(max-min);

                textField_1.setText(""+chif);

                int chif_nmb = nmb * chif;

                textField_2.setText(""+chif_nmb);





            }
        });

        btnButton1.setBounds(0, 156, 450, 23);
        frmTest.getContentPane().add(btnButton1);
        btnDehiffrer.setToolTipText("Dechiffrer");
        btnDehiffrer.setForeground(randomColor.brighter());
        btnDehiffrer.setFont(new Font("Tahoma", Font.PLAIN, 16));
        btnDehiffrer.setBounds(0, 190, 450, 23);
        frmTest.getContentPane().add(btnDehiffrer);

        separator = new JSeparator();
        separator.setOpaque(true);
        separator.setBackground(randomColor.brighter());
        separator.setForeground(randomColor.brighter());
        separator.setBounds(0, 224, 450, 2);
        frmTest.getContentPane().add(separator);

        textField_4 = new JTextField();
        textField_4.setSelectedTextColor(randomColor.brighter());
        textField_4.setForeground(randomColor.brighter());
        textField_4.setFont(new Font("Tahoma", Font.PLAIN, 14));
        textField_4.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
        textField_4.setOpaque(false);
        textField_4.addKeyListener(new KeyAdapter() {
            @Override
            public void keyTyped(KeyEvent e) {

                textField_4.addKeyListener(new java.awt.event.KeyAdapter() {
                    public void keyTyped(java.awt.event.KeyEvent evt) {

                     if(!(Character.isDigit(evt.getKeyChar()))){
                            evt.consume();
                        }
                    }
                });

            }
        });
        textField_4.setToolTipText("Entrer un nombre ici");
        textField_4.setHorizontalAlignment(SwingConstants.CENTER);
        textField_4.setColumns(10);
        textField_4.setBounds(215, 261, 219, 20);
        frmTest.getContentPane().add(textField_4);
        textField_4.setDocument(new JTextFieldLimit(9));

        label = new JLabel("Entrer un nombre:");
        label.setForeground(randomColor.brighter());
        label.setFont(new Font("Tahoma", Font.PLAIN, 15));
        label.setBounds(10, 259, 141, 20);
        frmTest.getContentPane().add(label);

        textField_6 = new JTextField();
        textField_6.setSelectedTextColor(randomColor.brighter());
        textField_6.setForeground(randomColor.brighter());
        textField_6.setFont(new Font("Tahoma", Font.PLAIN, 14));
        textField_6.setOpaque(false);
        textField_6.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
        textField_6.addKeyListener(new KeyAdapter() {
            @Override
            public void keyTyped(KeyEvent e) {

                textField_6.addKeyListener(new java.awt.event.KeyAdapter() {
                    public void keyTyped(java.awt.event.KeyEvent evt) {

                     if(!(Character.isDigit(evt.getKeyChar()))){
                            evt.consume();
                        }
                    }
                });

            }
        });
        textField_6.setToolTipText("Nombre chiffré: ");
        textField_6.setHorizontalAlignment(SwingConstants.CENTER);
        textField_6.setColumns(10);
        textField_6.setBounds(215, 292, 219, 20);
        frmTest.getContentPane().add(textField_6);      
        textField_6.setDocument(new JTextFieldLimit(9));    





        label_2 = new JLabel("Nombre chiffré: ");
        label_2.setForeground(randomColor.brighter());
        label_2.setToolTipText("Nombre chiffré: ");
        label_2.setFont(new Font("Tahoma", Font.PLAIN, 15));
        label_2.setBounds(10, 290, 195, 20);
        frmTest.getContentPane().add(label_2);

        textField_7 = new JTextField();
        textField_7.setSelectedTextColor(randomColor.brighter());
        textField_7.setForeground(randomColor.brighter());
        textField_7.setFont(new Font("Tahoma", Font.PLAIN, 14));
        textField_7.setOpaque(false);
        textField_7.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
        textField_7.setEditable(false);
        textField_7.setToolTipText("Nombre dechiffré: ");
        textField_7.setHorizontalAlignment(SwingConstants.CENTER);
        textField_7.setColumns(10);
        textField_7.setBounds(215, 323, 219, 20);
        frmTest.getContentPane().add(textField_7);

        label_3 = new JLabel("Nombre dechiffré: ");
        label_3.setForeground(randomColor.brighter());
        label_3.setToolTipText("Nombre dechiffré: ");
        label_3.setFont(new Font("Tahoma", Font.PLAIN, 15));
        label_3.setBounds(10, 321, 151, 20);
        frmTest.getContentPane().add(label_3);





        button = new JButton("Chiffrer");
        button.setHorizontalTextPosition(SwingConstants.CENTER);
        button.setContentAreaFilled(false);
        button.setBorder(null);
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {


                //Demande de nombre 
                int nmb = Integer.parseInt(textField_4.getText());



                //Chifrement

                int chif_nmb = (510-nmb)+834*nmb;

                textField_6.setText(""+chif_nmb);


            }
        });
        button.setToolTipText("Chiffrer");
        button.setForeground(randomColor.brighter());
        button.setFont(new Font("Tahoma", Font.PLAIN, 16));
        button.setBounds(0, 354, 450, 23);
        frmTest.getContentPane().add(button);


        button_1 = new JButton("Dechiffrer");
        button_1.setHorizontalTextPosition(SwingConstants.CENTER);
        button_1.setBorder(null);
        button_1.setContentAreaFilled(false);
        button_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {

                //Demande de nombre 


                int nmb = Integer.parseInt(textField_6.getText());

                //Chifrement

                int chif_nmb = (nmb - 510)/833;

                textField_7.setText(""+chif_nmb);


            }
        });
        button_1.setToolTipText("Dechiffrer");
        button_1.setForeground(randomColor.brighter());
        button_1.setFont(new Font("Tahoma", Font.PLAIN, 16));
        button_1.setBounds(0, 388, 450, 23);
        frmTest.getContentPane().add(button_1);

        JLabel lblCh = new JLabel("Chiffrement complexe");
        lblCh.setForeground(randomColor.brighter());
        lblCh.setFont(new Font("Comic Sans MS", Font.BOLD, 19));
        lblCh.setBounds(121, 0, 219, 28);
        frmTest.getContentPane().add(lblCh);

        JLabel label_4 = new JLabel("Chiffrement normal");
        label_4.setForeground(randomColor.brighter());
        label_4.setFont(new Font("Comic Sans MS", Font.BOLD, 19));
        label_4.setBounds(121, 230, 219, 28);
        frmTest.getContentPane().add(label_4);








    }





}

Answer 1

您可以编写一个Thread来根据需要更改组件的颜色，例如：

class Effect extends Thread {

    public void run() {
        try {
            while (true) {
                yourLabel.setForeground(new Color(aValue, bValue, cValue)); // you can apply coloring logic
                Thread.sleep(500); //sleep for 0.5 secs , so your color changes twice every second
            }
        } catch (InterruptedException e) {
        }
    }
}