Java Check If a String Is Valid Json or Valid Xml or Neither

Way to quickly check if string is XML or JSON in C#

Very simple:

1. Valid JSON starts always with '{' or '['
2. Valid XML starts always with '<'

I'm talking about non-space data.

Java random number with given length

Generate a number in the range from 100000 to 999999.

// pseudo code
int n = 100000 + random_float() * 900000;

For more details see the documentation for Random

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