String toLowerCase(): This method converts all the characters of the string into lower case, and returns the lower-cased string.
Example: String str1 = HELLO;
System.out.println(str1.toLowerCase());
Output: hello
String toUpperCase(): This method converts all the characters of the string into upper case, and returns the upper-cased string.
class Test
{
public static void main(String[] args)
{
String str="freetmielearn HOW R U";
System.out.println(str.toUpperCase());
System.out.println(str.toLowerCase());
System.out.println("FREETIMELEARN ".toLowerCase());
}
}
Output :
FREETIMELEARN HOW R U, freetmielearn how r u, freetmielearn
