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Java - get long min value

2 points
Created by:
Root-ssh
6376

Short solution:

long MIN_VALUE = Long.MIN_VALUE;

System.out.println(MIN_VALUE); // -9223372036854775808

Java Long min value is -9,223,372,036,854,775,808

Short solution to get long max value:

long MAX_VALUE = Long.MAX_VALUE;

System.out.println(MAX_VALUE); // 9223372036854775807

Java Long max value is  9,223,372,036,854,775,807

1. Different ways of how to get Long min value

  • Using build-in Long.MIN_VALUE
  • Using Math power() method eg: (long) Math.pow(2, 63) + 1
  • Using bit shifting eg: -1L << 63
  • Using bit shifting and not eg: ~(~0L >>> 1)
public class Example1 {

    public static void main(String[] args) {

        long MIN_VALUE = Long.MIN_VALUE;
        System.out.println(MIN_VALUE);   // -9223372036854775808

        long MIN_VALUE_2 = (long) Math.pow(2, 63) + 1;
        System.out.println(MIN_VALUE_2); // -9223372036854775808

        long MIN_VALUE_3 = -1L << 63;
        System.out.println(MIN_VALUE_3); // -9223372036854775808

        long MIN_VALUE_4 = ~(~0L >>> 1);
        System.out.println(MIN_VALUE_4); // -9223372036854775808
    }
}

Output:

-9223372036854775808
-9223372036854775808
-9223372036854775808
-9223372036854775808

2. Long minimum value overflow example

public class Example2 {

    public static void main(String[] args) {

        long MIN_VALUE = Long.MIN_VALUE;
        long overflow = MIN_VALUE - 100;
        System.out.println(overflow); // 9223372036854775708
    }
}

Output:

9223372036854775708

 

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