SWING實現滾動字幕

lyz 14年前發布 | 7K 次閱讀 JavaSwing

package com.lyz;

import java.awt.Color;

import java.awt.Component;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.GraphicsEnvironment;

import java.awt.event.ComponentListener;

import java.beans.PropertyChangeListener;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class Test extends JFrame {

public Test() {

super("Test",GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration());

MoveLabel label = new MoveLabel("帶有滾動效果的標簽");

this.add(label);

Test.removeListener(this);

this.setIgnoreRepaint(false);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setSize(600, 300);

this.setVisible(true);

}

public static void main(String args[]) {

new Test();

// System.getProperties().list(System.out);

}

public static void removeListener(Component component){

ComponentListener[] componentListener = component.getComponentListeners();

for(int i = 0; i < componentListener.length;i++){

component.removeComponentListener(componentListener[i]);

}

PropertyChangeListener[] changeListener = component.getPropertyChangeListeners();

for(int i = 0; i < changeListener.length;i++){

component.removePropertyChangeListener(changeListener[i]);

}

/**

* 帶有滾動效果的Label標簽

*/

private class MoveLabel extends JPanel implements Runnable{

private String text = null;

private Thread thread = null;

private int x = 0;

private int w = 0, h = 0;

public MoveLabel(String text) {

super();

this.text = text;

this.setBackground(Color.BLACK);

this.setFont(new Font("宋體", Font.PLAIN, 300));

this.setForeground(Color.red);

this.setIgnoreRepaint(false);

Test.removeListener(this);

thread = new Thread(this);

thread.start();

}

public void update(Graphics g) {

paint(g);

}

/*

* 繪制

*/

protected void paintComponent(Graphics g) {

super.paintComponent(g);

g.setColor(this.getBackground());

g.fillRect(0, 0, w = this.getWidth(), h = this.getHeight());

g.setColor(this.getForeground());

g.setFont(this.getFont());

g.drawString(text, x, h - 1);

}

public void run() {

while (true) {

x -= 1;

if (x < -w) {

x = w;

}

this.repaint();

try {

Thread.sleep(16);//間隔繪制16毫秒

} catch (InterruptedException e) {

e.printStackTrace();

}

}

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JavaSwing

SWING實現滾動字幕

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