Generic trim function in java?

i have a requirement, where i need to develop a single method which accepts any type of paramter(String or Integer etc) and applies tri开发者_开发技巧m() to remove leading and trialing spaces. please help me how to write generic method to achieve this?

Thanks!

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Java has strictly defined types, it's not PHP or Javascript. Integer does not have spaces. Simply use trim() method of String object. If your 'integer' is actually a string, do (String.valueOf(x)).trim()

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It does not make a lot of sense, but here it goes:

public String trim(Object o) {
  if (o != null) { 
    return o.toString().trim();
  }
  return null;
}

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if an integer is like 12345---. --- indicates 3 spaces. how can i remove? do i need to convert it to string before trimming?

If an 'integer' has trailing spaces, it is already the string representation of the integer, not the integer itself. Therefore:

String i = "12345   ";
String trimmed = i.trim();

By contrast, the following is simply not legal

int i = "12345   ";  // compilation error

and a string representation of an integer produced like this:

String i = String.valueOf(12345);

will not have leading or trailing whitespace.

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In java, all objects have .toString() method which returns string representation of that object.

You can then call .trim() method on that string, so your function may look like this:

public static String trimAny(Object o) {
    return o.toString().trim();
}