KwickClips Java · 43 sec · free
How do you check if a character is a digit?
Short answer. Character.isDigit(c), which gives true or false.
Does toUpperCase change the original character?
No. It returns the capital form as a new value.
Character methods
| Method | Example |
|---|---|
| isDigit | '7' is true |
| isLetter | 'k' is true |
| isWhitespace | ' ' is true |
| isUpperCase | 'A' is true |
Remember
| is methods return true or false |
| toUpperCase returns a char |
Digit, letter or space? Ask Java. Ask Character. Is digit checks zero to nine. Is letter checks letters. Is whitespace checks spaces. Is upper case checks capitals. Is methods give true or false. To upper case returns the capital.
This clip is from the full lesson: Wrapper Classes, Autoboxing and Character Methods — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 12 Information Technology (802), ICSE Class 10 Computer Applications, ICSE Class 10 Computer Applications, ICSE Class 10 Computer Applications
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