How to generate random alpha numeric String in Java
Following code is an example of generating a random alpha-numeric string using Java Random class. It is designed to generate random String of varying length based on the input parameter.
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Java String comparison. The difference between == and equals().
Many Java beginners find it difficult to differentiate between == operator and the “equals()” method when comparing String variables in Java. They assume that both operations perform the same function and either one can be used to compare two string variables. I have even seen many experienced programmers committing the mistake of using “==” to […]
Best way to check if a Java String is a number.
An example on how to validate if a String variable in Java has all numeric digits.
Extract substring from end of a Java String
Today I’ll show you how to extract last few characters (a substring) from a string in Java. Here is the code to do this.