Java/Swing 中的闪屏错误

Question

我正在用 Java 创建新的启动画面（使用 Netbeans 作为我的 IDE）。

但问题是，在进度条达到 100% 后，它会自动移动到第二帧并退出显示初始屏幕的第一帧。但是这里第一屏的启动画面没有退出。

这是我的代码

public NewJFrame() {
        initComponents();
        try {
            for (int i=0;i<=100;i++){
                Thread.sleep(40);
            jLabel1.setText(Integer.toString(i)+"%");
            jProgressBar2.setValue(i);
            if (i==100)
            {
                this.setVisible(false);
              new  NewJFrame1().setVisible(true);
            }
            }
        } catch (Exception e) {
        }
    }

Answer 1

我曾经创造了一个简单的飞溅，不是为了幻想，但对我来说它成功了。

这是从 netbeans 整个类的复制粘贴，因此您需要更改一些内容。

这个例子你会得到一个带有图像和进度条的飞溅。

import javax.swing.SwingUtilities;

public class Splash extends javax.swing.JWindow {

private static final long serialVersionUID = -6711792976773608816L;

/**
 * Creates new form Splash
 */
public Splash() {
    initComponents();
}

public void splashScreenInit() {
    setLocationRelativeTo(null);
    setProgressMax(100);
    setVisible(true);        
}

/**
 * This method is called from within the constructor to initialize the form. WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 */
@SuppressWarnings("all")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    imageLabel = new javax.swing.JLabel();
    progressBar = new javax.swing.JProgressBar();

    imageLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("/images/help/splash.png"))); // NOI18N
    getContentPane().add(imageLabel, java.awt.BorderLayout.CENTER);

    progressBar.setForeground(new java.awt.Color(51, 85, 112));
    progressBar.setStringPainted(true);
    getContentPane().add(progressBar, java.awt.BorderLayout.PAGE_END);

    pack();
}// </editor-fold>                        

/**
 * Sets the max value for the progressbar
 * @param maxProgress 
 */
public void setProgressMax(int maxProgress) {
    progressBar.setMaximum(maxProgress);
}

public void setProgress(int progress) {
    final int theProgress = progress;
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            progressBar.setValue(theProgress);
        }
    });
}

/**
 * Changes the string message and set a new value fro the progressbar
 * @param message String the message
 * @param progress int the new value of the progressbar. This cant be higher than the value defined in the setProgressMax
 */
public void setProgress(String message, int progress) {
    final int theProgress = progress;
    final String theMessage = message;
    setProgress(progress);
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            progressBar.setValue(theProgress);
            setMessage(theMessage);
        }
    });
}

private void setMessage(String message) {
    if (message == null) {
        message = "";
        progressBar.setStringPainted(false);
    } else {
        progressBar.setStringPainted(true);
    }
    progressBar.setString(message);
}

// Variables declaration - do not modify                     
private javax.swing.JLabel imageLabel;
private javax.swing.JProgressBar progressBar;
// End of variables declaration                   
}

打电话

final Splash s = new Splash();
SwingUtilities.invokeLater(new Runnable() {
    @Override
    public void run() {
        s.splashScreenInit();
    }
});

到最后

s.setVisible(false);

Answer 2

以下是我的代码，它在我的系统中正常工作。你可以尝试在你的代码中添加导入以下内容

//import com.sun.awt.AWTUtilities;
//import java.awt.event.ActionEvent;
//import javax.swing.Timer;
//import javax.swing.UIManager;
//import java.awt.event.ActionListener;
//import javax.swing.JProgressBar;



    private Timer t;
        private ActionListener al;

        /**
         * Creates new form NewJFrame
         */

        public NewJFrame() {

            ActionListener a1 = new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                  //  throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
                if(jProgressBar1.getValue()<100)
                    {
                  jProgressBar1.setValue(jProgressBar1.getValue()+5);
                    }
                else
                    {
                        t.stop();
                        abcd();
                    }
                }
            };
       t=new Timer(80, a1);
       initComponents();
       AWTUtilities.setWindowOpaque(this, false);
       t.start();
        }

        @SuppressWarnings("unchecked")
        // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
        private void initComponents() {

            jPanel1 = new javax.swing.JPanel();
            jLabel1 = new javax.swing.JLabel();
            jProgressBar1 = new javax.swing.JProgressBar();

            setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
            setUndecorated(true);

            jLabel1.setText("jLabel1");

            javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
            jPanel1.setLayout(jPanel1Layout);
            jPanel1Layout.setHorizontalGroup(
                jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(jPanel1Layout.createSequentialGroup()
                            .addGap(123, 123, 123)
                            .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 136, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGroup(jPanel1Layout.createSequentialGroup()
                            .addGap(92, 92, 92)
                            .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addContainerGap(141, Short.MAX_VALUE))
            );
            jPanel1Layout.setVerticalGroup(
                jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addGap(66, 66, 66)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 46, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(41, 41, 41)
                    .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(133, Short.MAX_VALUE))
            );

            javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
            getContentPane().setLayout(layout);
            layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            );
            layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            );

            pack();
        }// </editor-fold>                        
    private void abcd()
    {
        NewJFrame1 f1= new NewJFrame1();
        f1.setLocationRelativeTo(null);
    f1.setVisible(true);
    this.dispose();
    }