How to Convert Java Characters From Lowercase to Uppercase

Java contains functions for comparing, combining and separating strings of text.

The Java programming language comes with many tools for handling text. One of the easiest ways to handle text in Java is to cast the text as a string and use Java's built-in functions for acting upon strings. Converting Java strings between upper- and lower-case characters using such functions is simple.

Things You'll Need

• Java compiler

Instructions

Converting Characters to Uppercase

1. Cast the text in question as a string:

   String basicText = "this text is all lowercase";

2. Call the function "toUpperCase" on the string:

   String basicText = string.toUpperCase();

3. Output the text to verify it is all uppercase:

   System.out.println(basicText);

Converting Characters to Lowercase

1. Cast the text in question as a string:

   String basicText = "THIS STRING IS ALL UPPERCASE";

2. Call the function "toLowerCase" on the string:

   String basicText = string.toLowerCase();

3. Output the text to verify it is all uppercase:

   System.out.println(basicText);

References

• Example Depot: Converting Java String Cases

Resources

• The Java Tutorials: Working with Strings in Java