package chapter15;

/**
 * Title:        Chapter 15, "Multithreading"
 * Description:  Examples for Chapter 15
 * Copyright:    Copyright (c) 2000
 * Company:      Armstrong Atlantic State University
 * @author Y. Daniel Liang
 * @version 1.0
 */
// TestThread.java: Define threads using the Thread class
// TestRunnable.java: Define threads using the Runnable interface
// TestThread.java: Define threads using the Thread class
public class TestThread
{
  /**Main method*/
  public static void main(String[] args)
  {
    // Create threads
    PrintChar printA = new PrintChar('a', 100);
    PrintChar printB = new PrintChar('b', 100);
    PrintNum  print100 = new PrintNum(100);

    // Start threads
    print100.start();
    printA.start();
    printB.start();
  }
}

// The thread class for printing a specified character
// in specified times
class PrintChar extends Thread
{
  private char charToPrint;  // The character to print
  private int times;  // The times to repeat

  /**Construct a thread with specified character and number of
     times to print the character
   */
  public PrintChar(char c, int t)
  {
    charToPrint = c;
    times = t;
  }

  /**Override the run() method to tell the system
     what the thread will do
   */
  public void run()
  {
    for (int i=0; i<times; i++)
      System.out.print(charToPrint);
  }
}

// The thread class for printing number from 1 to n for a given n
class PrintNum extends Thread
{
  private int lastNum;

  /**Construct a thread for print 1, 2, ... i*/
  public PrintNum(int n)
  {
    lastNum = n;
  }

  /**Tell the thread how to run*/
  public void run()
  {
    for (int i=1; i <= lastNum; i++)
      System.out.print(" " + i);
  }
}