Java实现打字机效果源代码

import java.applet.*; import java.awt.*; import java.io.*; import java.net.URL; import java.util.*; public class Typewriter4 extends Applet implements Runnable { AudioClip hit, cr, ding ; boolean alreadyRun = false, soundOn = false, loop = false; Color bgColor = Color.lightGray, textColor = Color.black ; Font font ; Image offScreen, background ; int width, height, currentline = 0, currentword = 0, currentletter = 0, depth = 0, margin = 0, cycles = 0, step = 0, pause = 0, speed = 0, update = 0, linecount = 0 ; long lastread = 0; MediaTracker mt ; String soundactivation, text, textfile, target ; Thread woohoo = null; URL hotlink = null; Vector lines = null; public Typewriter4（） { alreadyRun = false; soundOn = false; loop = true; soundactivation = "enter"; } public void buildLines（） { lines = new Vector（）; FontMetrics fontmetrics = offScreen.getGraphics（）.getFontMetrics（）; StringTokenizer strTok = new StringTokenizer（text, " "） ; while （strTok.hasMoreTokens（）） { StringTokenizer strTok1 = new StringTokenizer（strTok.nextToken（））; int wordcount = strTok1.countTokens（）; String[] words = new String[wordcount]; for（int i = 0; i < wordcount; i++） words[i] = strTok1.nextToken（）; String s = "" ; for（int j = 0; j < wordcount; j++） { s = s ！= null ？ s + words[j] + " " : words[0]; if（fontmetrics.stringWidth（s） > width - margin * 2） { lines.addElement（s.substring（0, s.lastIndexOf（" ", s.lastIndexOf（" "） - 1）））; s = words[j] + " "; } } lines.addElement（s）; linecount = lines.size（）; } depth = height - fontmetrics.getHeight（） / 2; } public void checkTextfile（） { loop = true; text = ""; try { DataInputStream datainputstream = new DataInputStream（（new URL（getDocumentBase（）, textfile））.openStream（））; boolean flag = true; while（flag） { String s = datainputstream.readLine（）; if（s == null） flag = false; else text = text + s + " "; } datainputstream.close（）; lastread = （new Long（（new Date（））.getTime（）））.longValue（）; return; } catch（Exception exception） { System.out.println（"OOOHH--" + exception.toString（））; } }