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Answer : A Java library that converts cron expressions into human readable strings: https://github.com/RedHogs/cron-parser Well yes I did understand your question. But I should have explained my answer a little better. No I don’t know any tool that will help you get a cron expression in “human” readable form. But by getting access to the CronExpression you can create you own. Try calling cronTrigger.getExpressionSummary() on the cron expression: "0/2 * * 4 * ?" it returns the following String: seconds: 0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58 minutes: * hours: * daysOfMonth: 4 months: * daysOfWeek: ? lastdayOfWeek: false nearestWeekday: false NthDayOfWeek: 0 lastdayOfMonth: false calendardayOfWeek: false calendardayOfMonth: false years: * By having access to the CronExpression object, you can create your own "human" explenation. cron-utils may be useful for this task, since provides human readable descriptions and does ...

Answer : The first element represents the seconds; to run at second 0 and 30 use the following: 0/30 0/1 * 1/1 * ? * I hope this answer will help you. Please define the cron expression the below 0/30 * * * * ? * And then you go this website and test Cron Expression Generator & Explainer - Quartz. The same effect we can reach (Quartz Spring) using more simpler construction: 0/30 * * * * ? * The last asterisk we can omit. 0/30 * * * * ? Quartz scheduler cron trigger documentation 2.x