EN
Java - get long max value
12 points
Short solution:
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long MAX_VALUE = Long.MAX_VALUE;2
3
System.out.println(MAX_VALUE); // 9223372036854775807Java Long max value is
9223372036854775807
Additionally short solution to get long min value:
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long MIN_VALUE = Long.MIN_VALUE;2
3
System.out.println(MIN_VALUE); // -9223372036854775808Java Long min value is
-9223372036854775808
This section contains different approaches that lets to get max Long value.
- Using build-in
Long.MAX_VALUE - Using math power e.g.
(long) Math.pow(2, 63) - Using bit shifting e.g.
-1L >>> 1 - Using bit shifting and not e.g.
~0L >>> 1
Code example with above methods:
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public class Example1 {2
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public static void main(String[] args) {4
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long MAX_VALUE = Long.MAX_VALUE;6
System.out.println(MAX_VALUE); // 92233720368547758077
8
long MAX_VALUE_2 = (long) Math.pow(2, 63);9
System.out.println(MAX_VALUE_2); // 922337203685477580710
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long MAX_VALUE_3 = -1L >>> 1;12
System.out.println(MAX_VALUE_3); // 922337203685477580713
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long MAX_VALUE_4 = ~0L >>> 1;15
System.out.println(MAX_VALUE_4); // 922337203685477580716
}17
}Output:
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92233720368547758072
92233720368547758073
92233720368547758074
9223372036854775807xxxxxxxxxx1
public class Example2 {2
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public static void main(String[] args) {4
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long MAX_VALUE = Long.MAX_VALUE;6
long overflow = MAX_VALUE + 100;7
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System.out.println(overflow); // -92233720368547757099
}10
}Output:
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-9223372036854775709
