Java “Back to Basics” Tutorial
Last modified: August 15, 2019
This tutorial series focuses on core Java - "Back to Basics". We're going to cover Java Collections and Java IO:
1. Core Java Language Concepts
2. Core Java
5. Java Streams
6. Java IO
7. Advanced Java
8. Tracking Java Development
There we go - the "Back to Basics" Java series, covering basic operations with collections and IO.
If you have a few years of Linux experience, and you're interested in sharing that with the community (and getting paid for your work of course), have a look at the "Write for Us" page. Cheers. Eugen
Hey Eugen. when we use new operator to create a String object.
i.e String obj1=new String(“abc”);
It will create object in heap , but is it create an object in String pool also or copy the value in string pool.
Please elaborate the process.
Thanks
Deepak
Hey Deepak. Simply put, when you instantiate the String object via the constructor, you’re creating a new object on the heap. When you’re using the String literal, you’re referencing it in the String pool. That distinction will determine the equality of these references.
Of course there are a lot of solid tutorials online that go into the details of how that works, so I’d definitely recommend doing a search and reading through some of these – it’s worth taking a bit of time to get the basics nailed down.
Hope it helps. Cheers,
Eugen.
See Example 3.10.5-1. String Literals in Java language specification. Literal strings within the same class (§8) in the same package (§7) represent references to the same String object (§4.3.1). Literal strings within different classes in the same package represent references to the same String object. Literal strings within different classes in different packages likewise represent references to the same String object. Strings computed by constant expressions (§15.28) are computed at compile time and then treated as if they were literals. Strings computed by concatenation at run time are newly created and therefore distinct. The result of explicitly interning a computed… Read more »