Sometimes, we have a String which we just want to serialize as an XML element, so to convert it to XML:
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DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dBuilder.parse(fXmlFile);
Document actualElementXMLResult = dBuilder.parse
(new InputSource(new StringReader("<YourXMLElement>YourXMLElementGoesHere</YourXMLElement>")));
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This is suitable for students MAY BE. Sometimes, in programs that we have to write in academia, we just need to display a list of choices and then get a number representing the choice. Having manually to write the same code is not intelligent. Isn’t it?
I was doing the same shit right now. Then, i created a simple “factory” (Don’t get religious on this, its not a real factory) to display the choices:
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public class ChoiceFactory {
public static int getChoice(String choices[]){
String mainChoice = null;
Scanner in = new Scanner(System.in);
do {
if (mainChoice != null)
System.out.println("Please enter a 'decent' choice !!");
int choiceNum = 1;
for (String currentChoice:choices){
System.out.println(choiceNum+". "+currentChoice);
choiceNum ++;
}
System.out.print("Enter Choice:");
mainChoice = in.next();
} while (!mainChoice.matches("^[1-"+choices.length+"]*$"));
return Integer.valueOf(mainChoice).intValue();
}
}
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In case you see any improvement or error, please just leave a comment, I’ll correct it right away.
In Java, sometimes, we want to create to pass an array to as an argument without explicitly creating a variable to hold a reference to the array. We can do this like:
Instead of
String choices [] = {"Create a Plate","Delete a Plate","View Plates","Get Receipt"};
ChoiceFactory.getChoice(choices);
We can just do:
ChoiceFactory.getChoice(new String[] {"Create a Plate","Delete a Plate","View Plates","Get Receipt"});
Similarly, we can do the same for a list,
List
Simple 
