发布于 2016-07-18 21:37:27 | 131 次阅读 | 评论: 0 | 来源: 网友投递
Java程序设计语言
java 是一种可以撰写跨平台应用软件的面向对象的程序设计语言,是由Sun Microsystems公司于1995年5月推出的Java程序设计语言和Java平台(即JavaEE(j2ee), JavaME(j2me), JavaSE(j2se))的总称。
本文实例讲述了Java基于线程实现带有滚动效果的Label标签。分享给大家供大家参考。具体如下:
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
* Java中用线程实现带有滚动效果的Label标签
*/
public class Test extends JFrame {
private static final long serialVersionUID = -2397593626990759111L;
private JPanel pane = null;
private MoveLabel label = null;
public Test() {
super("Test");
pane = new JPanel();
label = new MoveLabel("带有滚动效果的标签");
pane.add(label);
this.getContentPane().add(pane);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(300, 200);
this.setVisible(true);
}
public static void main(String args[]) {
new Test();
}
/**
* 带有滚动效果的Label标签,可继续拓展很多特效,例如颜色变换、速度变换等
*/
private class MoveLabel extends JLabel implements Runnable {
private static final long serialVersionUID = 1891684760189602720L;
private String text = null;
private Thread thread = null;
private int x = 0;
private int w = 0, h = 0;
public MoveLabel(String text) {
super(text);
this.text = text;
thread = new Thread(this);
thread.start();
}
public String getText() {
return text;
}
public void setText(String text) {
super.setText(text);
this.text = text;
}
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 - 2);
}
public void run() {
while (true) {
x -= 2;
if (x < -w) {
x = w;
}
this.repaint();
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
希望本文所述对大家的java程序设计有所帮助。