IDE contains an inbuilt feature to convert string from/to UPPER to lowercase.
In Eclipse, Opened source code file content can be converted to upper or lower case. This converts the coding files and text files.
How to convert String to upper or lower case
The following are steps required to do the upper or lower case.
Open Eclipse
Select the file to open in it
Select the String you want to convert. You can also use
Ctrl + A
Right-click and it shows the popup
Select
Convert
->To Lower Case
to convert to lower caseSelect
Convert
->To Upper Case
to convert to upper caseConvert item on popup has different case conversion features
Camel
<->
Underscores
: Convert camel cases to underscoresCamel
<->
Pascal
: Convert camel cases to pascal caseCapitalize
: Convert camel cases to underscoresInvert Case
: Convert lower cases to upper, and upper to lower case

Shortcut command for upper and lower case in eclipse:
Case | Shortcut |
---|---|
To Upper Case | Ctrl + Alt + U |
To Lower Case | Ctrl + Alt + L |
Invert Case | Ctrl + Alt + I |