See if a string starts with spaces in Java

Question

I know that trim removes spaces from the beginning and end of a line, but I need to check if the first character of the line is a space. I tried what seems to be about everything, but I can't get it to work.

Can someone point me in the right direction? I would appreciate it if regular expressions were not used.

Thanks a lot!

Answer 1

if (Character.isWhitespace(str.charAt(0))) { // do something } 

Answer 2

 if (Character.isWhitespace(str.charAt(0))) //... 

Answer 3

 public void yourMethod(String string) { if (isLengthGreaterThanZero(string) && isFirstCharacterWhiteSpace(string)) { ... } } private boolean isFirstCharacterWhiteSpace(String string) { char firstCharacter = string.charAt(0); return Character.isWhitespace(firstCharacter); } private boolean isLengthGreaterThanZero(String string) { return string != null && string.length() > 0; } 

Answer 4

 "string".startsWith(" ")