How to Ignore a Case Sensitive Input in Java

Some applications process character strings that, because of the nature of the information they contain, should not be case sensitive. A common example of this is email addresses. For those strings, comparisons should ignore the case of letters -- for example, "[e-mail]" should be considered equal to "[e-mail]." There's a simple way to write Java code that ignores the case of letters in the input.

Instructions

1. Include the following line at the beginning of your Java code:

   import java.lang.String;

2. Store the string whose case must be ignored as an instance of Java class "String," as in the following sample code:

   String myInput = "[e-mail]";

3. Convert the string to lower case before storing it or comparing it with other values, as in the following sample code:

   convertedInput = String.toLowerCase(myInput);

   For the example, "convertedInput" will have value "[e-mail]."

References

• Oracle: Java Class String