Does substring method cause memory leak?

It was and it is fixed since JDK 1.7. The issue was substring method creates new String object keeping a reference to the whole char array, thus inadvertently keep a reference to a very big character array with just a one character string.

It was fixed in Java 7, rather than sharing original character array, substring method creates a copy of it and creates new String.

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System.out.println ("A"=="A");

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Java / Using String

Does substring method cause memory leak?

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