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Which inbuilt java classes other than String uses pooling? For example we have String which uses pooling,what are the other inbuit java classes that uses pooling?

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  • Threads come to mind... Commented Aug 14, 2019 at 11:27

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The Integer has a pool with a pool with all the values between -128 and 127.

If you do:

Integer x = 127;
Integer y = 127;
System.out.println(x == y);

you'd get true as an output, but if you change that to:

Integer x = 128;
Integer y = 128;
System.out.println(x == y);

then you'd get false, as 128 is not part of the pool and x and y actually represent two different objects.

More info:

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Between at least -128 and 127, and you can configure the JVM to cache values outside this range too.
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am not sure if it fits the bill, java.net.InetAddress uses dns resolution (domain to ip translation) cache. it actually has two caches - for positive as well as negative lookups.

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I view caching and polling as two different things.

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