Java with String length limit

Java with String length limit

I am trying to solve a CodeChef problem in Java and found out that I could
not create a String with length > one million chars (with my compiler at
least). I pasted the first one million decimal digits of Pi in a string
(e.g. String PI = "3.1415926535...151") in the Java file and it fails to
compile. When I take out the Pi and replace it with a shorter string like
"dog", the code compiles. Can anyone confirm if this is indeed a
limitation of Java?
Thanks.