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POPausing/resuming multiple threads in java
 

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    <p>Trying to write a program that will run, suspend, and resume 3 threads. </p> <p>here's the coding:</p> <pre><code>class Connectthread implements Runnable { public void run() { for(int j=0;j&lt;90;j+=10) System.out.println("Connecting..." + j + " Secs"); } } class DLoadthread implements Runnable { public void run() { for(int d=0;d&lt;60;d+=10) System.out.println("Downloading..." + d + " Secs"); } } class Runthread implements Runnable { public void run() { for(int r=0;r&lt;120;r+=10) System.out.println("Running..." + r + " Secs"); } } class EHAunitThread { Connectthread ct=new Connectthread(); DLoadthread dt=new DLoadthread(); Runthread rt=new Runthread(); public void main(String arg[]) { //putting threads into ready state. System.out.print("Starting threads\n"); ct.start(); dt.start(); rt.start(); System.out.print("Sleeping 3 seconds\n"); safeSleep(3000, "Threads first sleep time interrupted\n"); System.out.print("Suspending threads\n"); ct.suspend(); dt.suspend(); rt.suspend(); System.out.print("Sleep 5 seconds\n"); safeSleep(5000, "Threads second sleep time interrupted\n"); System.out.print("Resume threads\n"); ct.resume(); dt.resume(); rt.resume(); try { ct.join(); dt.join(); rt.join(); } catch (InterruptedException e) { System.out.print("Join interrupted"); } System.out.print("Testcase Completed"); System.exit(0); } } </code></pre> <p>it keeps giving me 14 of these <code>error:cannot find symbol</code> messages when i try to compile it.</p> <p>To my knowledge, the coding <em>looks</em> correct as far as grammar is concerned. What am I doing wrong here?</p>
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    1. COThe compiler also displays the missing `symbol:` and a nice excerpt intended to help you find out what exactly it's missing.
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    2. COThe threads will all be finished when you'll try to suspend them. And as the compiler and the javadoc tells you: `suspend()` and `resume()` are deprecated and should thus **not** be used. Don't use `suspend()` and `resume()`. BTW, I don't won't to be rude, but if you don't know how to fix such a basic compilation issue, you're not ready to mess with threads, which are a very, very, **very** complex matter.
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    3. CO@ignis: it doesn't say anything about what's missing.
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      1. USJeremy Warren
 

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