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jdk8u-jdk reviews and mentions
- Hi folks, Is there anywhere I can see Java programmes broken down with each method explained ?
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A Neat XOR Trick
Note that for enumerable domains of less than 64, using a long plus bit ops has been a standard Set implementation for quite a while. For example, Java's EnumSet uses a long if the enum has less than 64 values:
https://github.com/frohoff/jdk8u-jdk/blob/master/src/share/c...
Where add() uses `|= bitmask`, remove() uses `&= ~bitmask`, and size() uses a count of the 1's in the long.
Adding XOR as an efficient toggle would be interesting, but unnecessary to keep this O(n), if I understand correctly. It's just toggling the value, so (albeit with an extra branch), you could implement it as:
if (!set.contains(val)) {
- Java program no longer works ( .class )
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A refresher on modern low-level Java file I/O
It can be fast but its implementation depends on a graceful degredation strategy, though I've found it to be fast on Linux in the past:
- Java 17 depends on DNS lookups for hashing a web URL
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Why does Gauva cache doesn't implement Concurrent hash map using red black tree in the worst case collsion?
Jdk ConcurrentHashMap : https://github.com/frohoff/jdk8u-jdk/blob/master/src/share/classes/java/util/concurrent/ConcurrentHashMap.java
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A note from our sponsor - InfluxDB
www.influxdata.com | 1 May 2024
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frohoff/jdk8u-jdk is an open source project licensed under GNU General Public License v3.0 only which is an OSI approved license.
The primary programming language of jdk8u-jdk is Java.
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