Java圖形程序中的對話逐字顯示實現 – JAVA編程語言程序開發技術文章

在現代，摒棄傳統的會話方式，很多的圖形廣告或遊戲采用瞭[逐字打印]的效果來展示文字，當然，這樣做的目的無非是為瞭突出內容或吸引眼球。

但是這種實現方式卻是值得借鑒的，以下，我給出一個JAVA實現的簡單用例，需要者可以自行擴充。

代碼實現：

package org.test;

import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Panel;
import java.awt.image.BufferedImage;

import org.loon.framework.game.helper.ImageHelper;

/** *//**
 * <p>
 * Title: LoonFramework
 * </p>
 * <p>
 * Description:JAVA實現對話逐字打印（由Loonframework提供）
 * </p>
 * <p>
 * Copyright: Copyright (c) 2007
 * </p>
 * <p>
 * Company: LoonFramework
 * </p>
 *
 * @author chenpeng
 * @email：ceponline@yahoo.com.cn
 * @version 0.1
 */

public final class WriterType extends Panel implements Runnable …{
    // 最大對話數
    private int _MAX_COUNT = 10;

    //間隔標記
    private char _flag=|;
   
    private Image _screen;

    private Graphics _bg;

    private Thread _L_WriterType;

    private static Color _L_fClr;

    private static Color _L_bClr;

    private static String _M_Text[];

    private int _S_COUNT;

    private Font _L_TTF;

    private int _L_Speed;

    private int _L_Delay;

    private String _C_Text[];

    private static int _L_COUNT;

    private static int _F_COUNT;
   
    private static int _T_COUNT;

    private static int _N_Text;

    private String _FontName;

    private final static int _WIDTH = 500;

    private final static int _HEIGHT = 375;

    private static int _FontStyle;

    private static int _FontSize;

    private static  Image _back = null;

    /** *//**
     *
     */
    private static final long serialVersionUID = 1L;

    private boolean _isRun;

    /** *//**
     * 析構函數,註入背景圖,循環顯示的文字數組,速度,延遲
     * @param img
     * @param strContent
     * @param speed
     * @param delay
     */
    public WriterType(Image img,String[] strContent, int speed, int delay) …{
        init(img,strContent, speed, delay);
    }

    private WriterType() …{

    }

    public void init(Image img,String[] strContent, int speed, int delay) …{
        //初始背景色
        setBackground(Color.BLACK);
        // 原始對話信息
        _M_Text = new String[_MAX_COUNT];
        // 緩存對話信息
        _C_Text = new String[_MAX_COUNT];

        _back=img;
        _FontName = “宋體”;

        _FontStyle = 0;

        _FontSize = 15;

        _L_TTF = new Font(_FontName, _FontStyle, _FontSize);
        _L_bClr = Color.BLACK;
        _L_fClr = new Color(250, 250, 250);

        int length = strContent.length;

        // 循環次數
        _N_Text = strContent.length – 1;

        // 直接copy String數組
        System.arraycopy(strContent, 0, _M_Text, 0, length);

        //速度及延遲設定
        _L_Speed = speed;
        _L_Delay = delay;
       
        //緩存區域
        _screen = new BufferedImage(_WIDTH, _HEIGHT, 1);
        _bg = _screen.getGraphics();

        //開啟線程
            _isRun = true;
            _L_WriterType = new Thread(this);
            _L_WriterType.start();
       
    }

    /** *//**
     * 停止線程
     *
     */
    public void stop() …{
        _S_COUNT = 0;
        _L_COUNT = 0;
        _F_COUNT = 0;
        if (_L_WriterType != null) …{
            _isRun = false;
            _L_WriterType = null;
        }
    }

    /** *//**
     * 繪制圖形
     */
    public void paint(Graphics g) …{
        _bg.setColor(_L_bClr);
        _bg.fillRect(0, 0, _WIDTH, _HEIGHT);
        _bg.setColor(_L_fClr);
        _bg.setFont(_L_TTF);
        _bg.drawImage(_back, 0, 0, this);
        for (int i = 0; i <= _L_COUNT; i++) …{
            //轉換當前字體top位置
            Double top = new Double((double) _FontSize
                    * (3.0D + 2.0D * (double) i));
            if (_C_Text[i] != null) …{
                _bg.drawString(_C_Text[i], 50, top.intValue());
            }
        }

        g.drawImage(_screen, 0, 0, this);
    }

    /** *//**
     * 圖形變更
     */
    public void update(Graphics g) …{
    &nbsp