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how to nest if statements in HashSet? [duplicate]

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I'm trying to find the lentgh of a set from a preference.
I tired set.length, but it doesnt work. Anyone know another way to find a length of a set?
set = prefs.getStringSet("key", null);
int X = set.length; //it doesn't like length....

I believe instead of set.length, you'll want to call set.size()

Your set is a Set<String>, not a String[]. So you have to call:
int x = set.size();

Converting a float to the integer with the same bit representation as it, in java? [closed]

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I think this is not hard in C with pointers. However, how would one do this in java? EG a float is represented as 101001, and you want the integer represented by 101001 (obviously shortened since they're really 32 bits)? Just curious.

I think you want Float.floatToIntBits().

How to set integer value on label? [closed]

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I'm trying to set a integer datatype value on label (data type string).
I used "setText" method nut it display an error.

label.setText(String.valueOf(intValue));
label.setText(Integer.toString(intValue));

Not only for integers , String class have valueOf methods for almost all data types
String.valueOf(int);
Ex
label.setText(String.valueOf(5)); //example 5.Place your integer.
Reference : Check Oracle docs on Converting Strings to Numbers

label.setText(intValue+"");
Will do the trick.

Whitespace matching regex in Java [closed]

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I am currently trying to make use of the java string function someString.replaceAll() to find commonly used words (and, the, by, of, etc) and replace them with " ". Based on the answers to the question at Whitespace Matching Regex - Java, I produced this function call:
data.replaceAll("(?i)\\sthe\\s", " ")
However, it isnt working and I'm really not sure why. Nothing about it looks wrong based on what I've found. Please help me!

Strings are immutable!
data = data.replaceAll("(?i)\\sthe\\s", " ");

Is it possible to use a String as the arguments for Files.move(source,target..) in Java? [closed]

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Can you use strings in some way to define the source and target of files.move.
Heres the documentation http://docs.oracle.com/javase/tutorial/essential/io/move.html

According to the javadoc, you can not use strings as arguments for Files.move .
What seems to be a better solution for you, is using the rename method on File. Something like this:
File file = new File("/path/to/file/to/be/moved");
boolean moved = file.renameTo("/new/path/for/the/file");
if(!moved)
//Handle the error

Short answer is no: Files.move requires Path objects. That said, you can use Paths.get(str) to simply turn a String into a Path.