Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Java Basics Perfecting the Prototype String Equality

Andrew Peterson
Andrew Peterson
1,192 Points
Posted by Andrew Peterson
Andrew Peterson
1,192 Points

Having some troubles with equalsIgnoreCase.

Not sure if I am using the IgnoreCase correctly. Any insight would be greatly appreciated!

Equality.java 
// I have imported a java.io.Console for you, it is named console. 
String firstExample = "hello";
String secondExample = "hello";
String thirdExample = "HELLO";
if (firstExample == secondExample) {console.printf("%s is equal to %s.", firstExample, secondExample);
                                   }
if (firstExample == thirdExample.equalsIgnoreCase("hello")) {
  console.printf("first and third are the same ignoring case");
}
Andrew Peterson
Andrew Peterson
1,192 Points
Andrew Peterson
Andrew Peterson
1,192 Points

Not sure if the challenge question is posted but here it is - Add another if statement that checks if the firstExample is equal ignoring case to thirdExample. If it, is print out "first and third are the same ignoring case".

1 Answer

jb30
jb30
44,806 Points

It is possible in Java for two Strings with the same characters to have different addresses in memory. For example,

String example1 = new String("hello");
String example2 = new String("hello");
System.out.println(example1 == example2); // Prints false

To check if firstExample and secondExample have the same characters, the first if block would become

if (firstExample.equals(secondExample)) {
    console.printf("%s is equal to %s.", firstExample, secondExample);
}

To check if firstExample and secondExample have the same characters ignoring case, the first line would become 

if (firstExample.equalsIgnoreCase(secondExample)) {