也许将计时器的间隔从50更改为较小的数字。
即从此：
timer = new Timer(50, this);
对此：
timer = new Timer(10, this);
注意：此处应避免使用幻数。
哎呀，像…
import java.awt.BorderLayout;import java.awt.Color;import java.awt.Component;import java.awt.Dimension;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class SlideEg extends JPanel { private SlideContainer slideContainer = new SlideContainer(); public SlideEg() { setLayout(new BorderLayout()); add(slideContainer, BorderLayout.CENTER); JLabel helloLabel = new JLabel("Hello", SwingConstants.CENTER); slideContainer.add(helloLabel); Timer myTimer = new Timer(5000, new ActionListener() { @Override public void actionPerformed(ActionEvent e) { JLabel goodbyeLabel = new JLabel("Goodbye", SwingConstants.CENTER); goodbyeLabel.setOpaque(true); goodbyeLabel.setBackground(Color.pink); slideContainer.add(goodbyeLabel); } }); myTimer.setRepeats(false); myTimer.start(); } private static void createAndShowGui() { SlideEg mainPanel = new SlideEg(); Jframe frame = new Jframe("SlideEg"); frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); frame.getContentPane().add(mainPanel); frame.pack(); frame.setLocationByPlatform(true); frame.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGui(); } }); }}class SlideContainer extends JLayeredPane { private static final int PREF_W = 400; private static final int PREF_H = PREF_W; private static final int SLIDE_DELAY = 20; protected static final int DELTA_X = 2; Component oldComponent; public SlideContainer() { setLayout(null); } @Override public Dimension getPreferredSize() { return new Dimension(PREF_W, PREF_H); } @Override public Component add(Component comp) { Component[] comps = getComponents(); if (comps.length > 0) { oldComponent = comps[0]; } if (oldComponent == comp) { return super.add(comp); } if (oldComponent != null) { putLayer((JComponent) oldComponent, JLayeredPane.DEFAULT_LAYER); } Component returnResult = super.add(comp); putLayer((JComponent) comp, JLayeredPane.DRAG_LAYER); comp.setSize(getPreferredSize()); comp.setVisible(true); comp.setLocation(getPreferredSize().width, 0); slideFromRight(comp, oldComponent); return returnResult; } private void slideFromRight(final Component comp, final Component oldComponent2) { new Timer(SLIDE_DELAY, new ActionListener() { @Override public void actionPerformed(ActionEvent aEvt) { int x = comp.getX(); if (x <= 0) { comp.setLocation(0, 0); putLayer((JComponent) comp, JLayeredPane.DEFAULT_LAYER); if (oldComponent2 != null) { remove(oldComponent2); } ((Timer) aEvt.getSource()).stop(); } else { x -= DELTA_X; comp.setLocation(x, 0); } repaint(); } }).start(); }}
