EN
Java - how to get int max and min value with bitwise operations?
2 points
Short solution:
xxxxxxxxxx1
int MAX_VALUE = -1 >>> 1;2
int MIN_VALUE = -1 << 31;3
4
System.out.println(MAX_VALUE); // 21474836475
System.out.println(MIN_VALUE); // -2147483648Other short solution:
xxxxxxxxxx1
int MAX_VALUE = ~0 >>> 1;2
int MIN_VALUE = ~MAX_VALUE;3
4
System.out.println(MAX_VALUE); // 21474836475
System.out.println(MIN_VALUE); // -2147483648xxxxxxxxxx1
public class Example1 {2
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public static void main(String[] args) {4
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int MAX_VALUE = -1 >>> 1;6
int MIN_VALUE = -1 << 31;7
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System.out.println(MAX_VALUE); // 21474836479
System.out.println(MIN_VALUE); // -214748364810
11
// 0111111111111111111111111111111112
System.out.println( toBinaryWithLeadingZeros(MAX_VALUE) );13
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// 1000000000000000000000000000000015
System.out.println( toBinaryWithLeadingZeros(MIN_VALUE) );16
}17
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private static String toBinaryWithLeadingZeros(int MAX_VALUE) {19
String binaryString = Integer.toBinaryString(MAX_VALUE);20
return String.format("%32s", binaryString).replace(' ', '0');21
}22
}xxxxxxxxxx1
public class Example2 {2
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public static void main(String[] args) {4
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int MAX_VALUE = ~0 >>> 1;6
int MIN_VALUE = ~MAX_VALUE;7
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System.out.println(MAX_VALUE); // 21474836479
System.out.println(MIN_VALUE); // -214748364810
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// 0111111111111111111111111111111112
System.out.println( toBinaryWithLeadingZeros(MAX_VALUE) );13
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// 1000000000000000000000000000000015
System.out.println( toBinaryWithLeadingZeros(MIN_VALUE) );16
}17
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private static String toBinaryWithLeadingZeros(int MAX_VALUE) {19
String binaryString = Integer.toBinaryString(MAX_VALUE);20
return String.format("%32s", binaryString).replace(' ', '0');21
}22
}xxxxxxxxxx1
public class Example3 {2
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public static void main(String[] args) {4
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System.out.println( Integer.MAX_VALUE ); // 21474836476
System.out.println( Integer.MIN_VALUE ); // -21474836487
}8
}
