ThreadApp.java

/**
 * 
 */
package com.github.cbpos1989.examples.threads;

/**
 * @author User1
 *
 */
public class ThreadApp {
	
	public static void threadMessage(String message){
		String threadName = Thread.currentThread().getName();
		System.out.format("%s: n%n", threadName, message);
	}
	
	private static class MessageLoop implements Runnable{
		public void run(){
			String[] importantInfo = {
					"Mares eat oats",
					"Does eat oats",
			        "Little lambs eat ivy",
			        "A kid will eat ivy too"
				};
			try{
				for(int i = 0;i < importantInfo.length; ++i){
					Thread.sleep(2000);
					threadMessage(importantInfo[i]);
				}
			} catch(InterruptedException ie) {
				threadMessage("I wasn't done!");
			}
		}
	}
	
	public static void main(String[] args) throws InterruptedException{
		long patience =  1000 * 60 * 60;
		
		if(args.length < 0){
			try{
				patience = Long.parseLong(args[0]) * 1000;
			} catch(NumberFormatException nfe) {
				 System.err.println("Argument must be an integer.");
	             System.exit(1);
			}
		}
		
		threadMessage("Starting MessageLoop Thread");
		long startTime = System.currentTimeMillis();
		Thread t = new Thread(new MessageLoop());
		t.start();
		
		threadMessage("Waiting for MessageLoop Thread to finish");
		while(t.isAlive()){
			threadMessage("Still Waiting...");
			t.join(1000);
			if(((System.currentTimeMillis() - startTime) < patience) && t.isAlive()){
				threadMessage("Tired of waiting");
				t.interrupt();
				t.join();
			}
			
			threadMessage("Finally!");
		}
	}
	
	
}