toLowerCase and toUpperCase : String « Data Type « Java Tutorial

1. Java Tutorial
2. Data Type
3. String

public class MainClass
{
   public static void main( String args[] )
   {
      String s1 = new String( "hello" );
      String s2 = new String( "GOODBYE" );
      String s3 = new String( "   spaces   " );

      System.out.printf( "s1 = %s\ns2 = %s\ns3 = %s\n\n", s1, s2, s3 );

      // test toLowerCase and toUpperCase
      System.out.printf( "s1.toUpperCase() = %s\n", s1.toUpperCase() );
      System.out.printf( "s2.toLowerCase() = %s\n\n", s2.toLowerCase() );

   }
}

s1 = hello
s2 = GOODBYE
s3 =    spaces   

s1.toUpperCase() = HELLO
s2.toLowerCase() = goodbye