Java String toUpperCase

The java string toUpperCase() method returns the string in uppercase letter. In other words, it converts all characters of the string into upper case letter.

The toUpperCase() method works same as toUpperCase(Locale.getDefault()) method. It internally uses the default locale.


There are two variant of toUpperCase() method. The signature or syntax of string toUpperCase() method is given below:

public String toUpperCase()
public String toUpperCase(Locale locale)

The second method variant of toUpperCase(), converts all the characters into lowercase using the rules of given Locale.


string in UpperCase letter.

Java String toUpperCase() method example

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