How to validate a null or empty array in Java

How to validate a null or empty array in Java

int[] arr = null;

if (arr != null && arr.length > 0){
///......
}

Solution: Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded

Problem: Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded

Solution: Run / Run Configurations / Java Application (select the class) / Arguments / VM arguments

-Xms512M -Xmx1024M

Or

-Xms1024M -Xmx2048M

Xms - for minimum limit

Xmx - for maximum limit