使用Java做壹個走馬燈，源代碼？

import?java.awt.Color;

import?java.awt.Dimension;

import?java.awt.Font;

import?java.awt.HeadlessException;

import?java.awt.Point;

import?java.awt.event.ActionEvent;

import?java.awt.event.ActionListener;

import?java.awt.event.ComponentAdapter;

import?java.awt.event.ComponentEvent;

import?javax.swing.JFrame;

import?javax.swing.JLabel;

import?javax.swing.JOptionPane;

import?javax.swing.JViewport;

import?javax.swing.Timer;

public?class?Test84?extends?JFrame?{

private?Timer?timer;

private?JLabel?view;

private?JViewport?window;

public?static?void?main(String[]?args)

{

JFrame?frm?=?new?Test84("跑馬燈");

frm.setDefaultCloseOperation(EXIT_ON_CLOSE);

frm.pack();

frm.setVisible(true);

}

public?Test84(String?title)?throws?HeadlessException

{

super(title);

initComponents();

addComponentListener(new?ComponentAdapter()?{

public?void?componentResized(ComponentEvent?e)

{

anchor?=?new?Point();

anchor.x?=?-window.getExtentSize().width;

timer.start();

}

});

timer?=?new?Timer(100,?new?ActionListener()?{

public?void?actionPerformed(ActionEvent?e)

{

animate();

}

});

timer.setInitialDelay(0);

}

private?void?initComponents()

{

String?s?=?JOptionPane.showInputDialog(null,?"請輸入要實現效果的文字:");

view?=?new?JLabel(s);

view.setFont(Font.decode("Dialog-BOLD-36"));

view.setForeground(Color.BLUE);

window?=?new?JViewport();

window.setView(view);

getContentPane().add(window);

}

Point?anchor;

private?void?animate()

{

Dimension?extSize?=?window.getExtentSize();

Dimension?viewSize?=?view.getPreferredSize();

anchor.x?+=?5;//設置移動的速度

window.setViewPosition(anchor);

if?(anchor.x?>?viewSize.width)

anchor.x?=?-extSize.width;

}

}

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