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Description skip to main | skip to sidebar Geek Explains: Java, J2EE, Oracle, Puzzles, and Problem Solving! Home Java/J2EE Tips/Hacks Oracle Puzzles Archives Saturday, November 28, 2009 Why String has been made immutable in Java? Why String has been made immutable...
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Geek Explains: Java, J2EE, Oracle, Puzzles, and Problem Solving! skip to main | skip to sidebar.
Geek Explains: Java, J2EE, Oracle, Puzzles, and Problem Solving! Home. Java/J2EE. Tips/Hacks.
Oracle. Puzzles. Archives. Saturday, November 28, 2009. Why String has been made immutable in Java?
Why String has been made immutable in Java? Though, performance is also a reason (assuming you are already aware of the internal String pool maintained for making sure that the same String object is used more than once without having to create/re-claim it those many times), but the main reason why String has been made immutable in Java is ' Security '. Surprised? Let's understand why.
Suppose you need to open a secure file which requires the users to authenticate themselves. Let's say there are two users named 'user1' and 'user2' and they have their own files '1' and '2', respectively. Obviously 'user2' should not have access to '1' file.
As we know the filenames in Java are specified by using Strings. Even if



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