如何将列表<String>转换为GroupMatcher <JobKey>

Question

如何将List转换为GroupMatcher？

我的代码就像这样。

List<String> jobGroupNames = scheduler.getJobGroupNames(); 

现在我要检查

for (GroupMatcher<JobKey> jobGroup : jobGroupNames) { 
} 

这里jobGroupNames是列表，所以我得到这个错误

Type mismatch: cannot convert from element type String to GroupMatcher<JobKey> 

Answer 1

jobGroupNames is a list of String, That's why you should iterate like below. 

// loop jobs by group 

List<String> jobGroupNames = scheduler.getJobGroupNames(); 

for (String groupName : jobGroupNames) { 

// And to get Job keys : 

    for (JobKey jobKey : scheduler.getJobKeys(GroupMatcher.jobGroupEquals(groupName))) { 
    } 
}