typeword.java

Java 多媒体技术(附源码) Java 3D API JavaSound API 各种格式的多媒体数据文件 JBuilder开发环境

package typeword;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

/**
 * <p>Title: 显示文字</p>
 * <p>Description: 以打字方式逐个循环显示文字</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: 北京师范大学计算机系</p>
 * @author 孙一林
 * @version 1.0
 */

public class TypeWord extends MultiThreadApplet {
  boolean isStandalone = false;
  String s_Word;                                             // 定义显示文字
  int s_length;					                // 获取字符串长度
  int x_character = 0;						// 显示到第几个字符
  Font wordFont = new Font("宋体" , Font.BOLD , 50);

  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //Construct the applet
  public TypeWord() {
  }
  //Initialize the applet
  public void init() {
    try {
      s_Word = this.getParameter("param0", "你好，欢迎光临！");
      s_length = s_Word.length();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception {
  }

  public void run() {
    while(true) {
      if( x_character++ >= s_length ){		// 显示字符计数加1
        x_character = 0;				// 显示字符计数清0
      }
      repaint();							// 刷新显示
      try{
        Thread.sleep(300);				// 线程休眠
      }
      catch( InterruptedException e ) {
      }
    }
  }
  public void paint( Graphics g ) {			// 显示文字
    g.setFont(wordFont);
    g.setColor(Color.red);
    g.drawString( s_Word.substring(0,x_character), 10, 50 );
  }

  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }
  //Get parameter info
  public String[][] getParameterInfo() {
    String[][] pinfo =
      {
      {"param0", "String", ""},
      };
    return pinfo;
  }
  //Main method
  public static void main(String[] args) {
    TypeWord applet = new TypeWord();
    applet.isStandalone = true;
    Frame frame;
    frame = new Frame() {
      protected void processWindowEvent(WindowEvent e) {
        super.processWindowEvent(e);
        if (e.getID() == WindowEvent.WINDOW_CLOSING) {
          System.exit(0);
        }
      }
      public synchronized void setTitle(String title) {
        super.setTitle(title);
        enableEvents(AWTEvent.WINDOW_EVENT_MASK);
      }
    };
    frame.setTitle("以打字方式逐个循环显示文字");
    frame.add(applet, BorderLayout.CENTER);
    applet.init();
    applet.start();
    frame.setSize(400,120);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
    frame.setVisible(true);
  }
}