You need to convert strings to upper case or lowercase, or to compare strings without regard for case.

The String class has a number of methods for dealing with documents in a particular case. toUpperCase( ) and toLowerCase( ) each return a new string that is a copy of the current string, but converted as the name implies. Each can be called either with no arguments or with a Locale argument specifying the conversion rules; this is necessary because of internationalization. Java provides significantly more internationalization and localization features than ordinary languages, a feature that will be covered in Chapter 14. While the equals( ) method tells you if another string is exactly the same, there is also equalsIgnoreCase( ), which tells you if all characters are the same regardless of case. Here, you can’t specify an alternate locale; the system’s default locale is used.

// Case.java
String name = "Java Cookbook";
System.out.println("Normal:	" + name);
System.out.println("Upper:	" + name.toUpperCase(  ));
System.out.println("Lower:	" + name.toLowerCase(  ));
String javaName = "java cookBook"; // As if it were Java identifiers :-)
if (!name.equals(javaName))
    System.err.println("equals(  ) correctly reports false");
else
    System.err.println("equals(  ) incorrectly reports true");
if (name.equalsIgnoreCase(javaName))
    System.err.println("equalsIgnoreCase(  ) correctly reports true");
else
    System.err.println("equalsIgnoreCase(  ) incorrectly reports false");

If you run this, it prints the first name changed to uppercase and lowercase, then reports that both methods work as expected.

C:javasrcstrings>java  Case
Normal: Java Cookbook
Upper:  JAVA COOKBOOK
Lower:  java cookbook
equals(  ) correctly reports false
equalsIgnoreCase(  ) correctly reports true