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POOutput with Thread Class and Runnable interface
 

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  1. POOutput with Thread Class and Runnable interface
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    <p>The two programs say both are implemented with the same logic namely, in one program, creating thread by extending Thread class and the other by implementing Runnable interface.</p> <p>Here the output will be like "Print some values till i press ENTER or RETURN key", My problem is, when i run these two programs "program where we are creating Thread by extending Thread class will by halted from extending Thread class printing values till i Press ENTER/RETURN but "program where we say both are creating Thread with Runnable interface output is getting halted"</p> <p>Here the logic is same in these two programs, only difference is one program extending Thread Class and implementing Runnable interface different.</p> <p>By Extending Thread </p> <pre><code>import java.io.IOException; class TryThread extends Thread { public TryThread(String firstName, String secondName, long delay) { this.firstName = firstName; this.secondName = secondName; aWhile = delay; setDaemon(true); } public void run() { try { while (true) { System.out.print(firstName); Thread.sleep(aWhile); System.out.print(secondName + "\n"); } } catch (InterruptedException e) { System.out.println(firstName + secondName + e); } } private String firstName; private String secondName; private long aWhile; } public class Lab1 { public static void main(String[] args) { Thread first = new TryThread("A ", "a ", 200L); Thread second = new TryThread("B ", "b ", 300L); Thread third = new TryThread("C ", "c ", 500L); System.out.println("Press Enter when you have had enough...\n"); first.start(); second.start(); third.start(); try { System.in.read(); System.out.println("Enter pressed...\n"); } catch (IOException e) { System.out.println(e); } return; } } </code></pre> <p>Output : </p> <pre><code>Press Enter when you have had enough... A B C a A b B a A c C a A b B a A b B c C a A a A b B a A c C b B a A Enter pressed... </code></pre> <p>By Implementing Runnable Interface</p> <pre><code>import java.io.IOException; class TryThread1 implements Runnable { public TryThread1(String firstName, String secondName, long delay) { this.firstName = firstName; this.secondName = secondName; aWhile = delay; } public void run() { try { while (true) { System.out.print(firstName); Thread.sleep(aWhile); System.out.print(secondName + "\n"); } } catch (InterruptedException e) { System.out.println(firstName + secondName + e); } } private String firstName; private String secondName; private long aWhile; } public class Lab2 { public static void main(String[] args) { Thread first = new Thread(new TryThread1("A ", "a ", 200L)); Thread second = new Thread(new TryThread1("B ", "b ", 300L)); Thread third = new Thread(new TryThread1("C ", "c ", 500L)); System.out.println("Press Enter when you have had enough...\n"); first.start(); second.start(); third.start(); try { System.in.read(); System.out.println("Enter pressed...\n"); } catch (IOException e) { System.out.println(e); } return; } } </code></pre> <p>Output</p> <pre><code>Press Enter when you have had enough... A B C a A b B a A c C a A b B a A b B c C a A a A b B a A c C b B a A a A b B c C a A Enter pressed... b B a A a A b B c C a A b B a A c C a A b B a A b B a A c C a A b B a A c C b B a A a A b </code></pre> <p>Please tell me difference between extending thread and implementing Runnable interface. Most of them prefer Implementing Runnable Interface. But from this output differences, I don't know which one to prefer</p>
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