Scanner Class And String Buffer

Question

Whenever I use Scanner class for input it shows a warning regarding memory leak, ".in" not closed. While using Buffered Reader it does not show any warning. Why So?

    class Demo    
    {    
        public static void main(String[] arg){    
        System.out.println("Enter a String");    
        Scanner sc = new Scanner(System.in);    
        String[] str = new String[1];    
        str[0] = sc.next();    
        System.out.println(str[0]);    
    }

perhaps [this](http://stackoverflow.com/questions/11463327/is-this-a-memory-leak-or-a-false-positive) will help? — Assaf, Sep 07 '14 at 08:12

score 2 · Accepted Answer · answered Sep 07 '14 at 08:11

2

In either case, you should close the Scanner or BufferedReader to avoid resource leaks. The compiler apparently doesn't recognize the problem with BufferedReader and doesn't issue the warning.

answered Sep 07 '14 at 08:11

Code-Apprentice

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Can you please explain how memory leaks? What if we define a string type array with only 1 value str[0] and taking only one input? – user3436422 Sep 07 '14 at 08:17
@user3436422, Add some code to your question so we can understand clearly. – Chaitanya Sep 07 '14 at 08:19
@user3436422 The memory leak has nothing to do with the variables where you store the input. It is the `Scanner` or `BufferedReader` object itself that causes the leak. When you close the `Scanner` or `BufferedReader`, you release the operating system resources which are used by these classes. – Code-Apprentice Sep 07 '14 at 08:22

Scanner Class And String Buffer

1 Answers1