Here is another method from my String utility class. This method uses a regular expression to check if a String is a numeric value. Look at the code, then read through the explanation that follows
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Launch Eclipse Click on Recent Workspaces Eclipse will list all previously used workspaces Right click on the workspace name that you want to remove Click on Remove from Launcher Selection text. This will remove the workspace from the drop-down list
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.
Scanner is a utility class that provides methods to read command-line input. It is a very useful class, but you need to be aware of its unexpected behavior while reading numeric inputs. Consider following example.
One of the most common bugs I’ve seen in Java programs in the use of == operator to compare two String objects. Most of the times the result may be accurate but it is not always guaranteed. We need to understand the difference between == and the Object.equals method.