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where do i place this question?In java also we can use these quartz cron expressions right..
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First example you give: 30 0/1 * * * ? <br />
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This means it wil start every 30 minutes in each hour. So 13:30, 14:30, 15:30 etcetera<br />
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Second example: 0 0/2 * * * ? <br />
It will run every 2 hours at 00 minutes. So 00:00, 02:00, 04:00 etcetera<br />
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Both will be executed every day.
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<pre><code class="code-1 nolinks" id="code-20-41494966-1"><span>30 0/1 * * * </span>
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At every 30th minute past every hour<br />

<pre><code class="code-1 nolinks" id="code-20-41494966-2"><span>0 0/2 * * *</span>
</code></pre>
On the hour every two hours<br />
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Both the above every day<br />
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Seconds do not have a field of their own
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what is the meaning of the below cron expressions?<br />
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is it going to every 1 min 30 secs or 1 hr 30 mins?<br />
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30 0/1 * * * ? <br />
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is it going to every 2 mins or 2 hr?<br />
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0 0/2 * * * ?
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what is the meaning of the below cron expressions?

is it going to every 1 min 30 secs or 1 hr 30 mins?

30 0/1 * * * ? 

is it going to every 2 mins or 2 hr?

0 0/2 * * * ?

what is the meaning of the below cron expressions

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.