EN
Java - how to get long max and min value with bitwise operations?
12 points
Short solution:
xxxxxxxxxx1
long MAX_VALUE = -1L >>> 1L;2
long MIN_VALUE = -1L << 63L;3
4
System.out.println(MAX_VALUE); // 92233720368547758075
System.out.println(MIN_VALUE); // -9223372036854775808Other short solution:
xxxxxxxxxx1
long MAX_VALUE = ~0L >>> 1L;2
long MIN_VALUE = ~MAX_VALUE;3
4
System.out.println(MAX_VALUE); // 92233720368547758075
System.out.println(MIN_VALUE); // -9223372036854775808xxxxxxxxxx1
public class Example1 {2
3
public static void main(String[] args) {4
5
long MAX_VALUE = -1L >>> 1L;6
long MIN_VALUE = -1L << 63L;7
8
System.out.println(MAX_VALUE); // 92233720368547758079
System.out.println(MIN_VALUE); // -922337203685477580810
11
// 011111111111111111111111111111111111111111111111111111111111111112
// 100000000000000000000000000000000000000000000000000000000000000013
System.out.println( toBinaryWithLeadingZeros(MAX_VALUE) );14
System.out.println( toBinaryWithLeadingZeros(MIN_VALUE) );15
}16
17
private static String toBinaryWithLeadingZeros(long MAX_VALUE) {18
String binaryString = Long.toBinaryString(MAX_VALUE);19
return String.format("%64s", binaryString).replace(' ', '0');20
}21
}xxxxxxxxxx1
public class Example2 {2
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public static void main(String[] args) {4
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long MAX_VALUE = ~0L >>> 1L;6
long MIN_VALUE = ~MAX_VALUE;7
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System.out.println(MAX_VALUE); // 92233720368547758079
System.out.println(MIN_VALUE); // -922337203685477580810
11
// 011111111111111111111111111111111111111111111111111111111111111112
// 100000000000000000000000000000000000000000000000000000000000000013
System.out.println( toBinaryWithLeadingZeros(MAX_VALUE) );14
System.out.println( toBinaryWithLeadingZeros(MIN_VALUE) );15
}16
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private static String toBinaryWithLeadingZeros(long MAX_VALUE) {18
String binaryString = Long.toBinaryString(MAX_VALUE);19
return String.format("%64s", binaryString).replace(' ', '0');20
}21
}xxxxxxxxxx1
public class Example3 {2
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public static void main(String[] args) {4
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System.out.println( Long.MAX_VALUE ); // 92233720368547758076
System.out.println( Long.MIN_VALUE ); // -92233720368547758087
}8
}
