Java Boolean hashCode() Method with Examples

by Online Tutorials Library July 22, 2022

Java Boolean hashcode() Method

The hashCode() method of Java Boolean class returns the hash code for Boolean.

Overrides:

The hashCode() method of Boolean class overrides the hashCode() method of class Object.

Syntax:

Parameters:

value – is the Boolean value provided to hash.

Return Value:

This method returns a hash code value for this Boolean object.

If the object represents true, the result returned is the integer 1231,
And if the object represents false, the result returned is the integer 1237.

Example 1

  public class BooleanHashCodeExample1 {      public static void main(String[] args) {         //create two boolean objects b1 and b2          Boolean b1 = true;          Boolean b2 = false;          // assign hash code of b1 and b2          int val1 = b1.hashCode();          int val2 = b2.hashCode();          //print the hash code          System.out.println(“1. Hash code of true = “+val1);          System.out.println(“2. Hash code of false = “+val2);      }  }  

Test it Now

Output:

1. Hash code of true = 1231  2. Hash code of false = 1237

Example 2

  import java.util.Scanner;    public class BooleanHashCodeExample2 {      public static void main(String[] args) {         Scanner scanner = new Scanner(System.in);          System.out.println(“Enter your age”);          int a = scanner.nextInt();          if(a>17) {              System.setProperty(“flag1”, “true”);          }              boolean b2 = Boolean.getBoolean(“flag1”);              // calling static hash code method              int val1 = Boolean.hashCode(b2);              if (val1 == 1231) {                  System.out.println(“Hash code match i.e. “+val1);                  System.out.println(“You are an adult.nYou are eligible to vote.”);              }          else{              int val2 =18-a;              System.out.println(“You are not an adult.nYou will be eligible to vote after “+val2+” years.”);          }      }  }  

Output:

Enter your age  18  Hash code match i.e. 1231  You are an adult.  You are eligible to vote.

Example 3

  import java.util.Scanner;    public class BooleanHashCodeExample3 {      public static void main(String[] args) {          Scanner scanner = new Scanner(System.in);          System.out.println(“Q How many days are there in a leap year?”);          System.out.print(“Ans: “); int a = scanner.nextInt();          Boolean b1 = false;          if(a==366){              b1 = true;          }          int val1 = Boolean.hashCode(b1);          if(val1==1231){              System.out.println(“Answer is right.”);          }          else{              System.out.println(“Answer is wrong.”);          }      }  

Output:

Q How many days are there in a leap year?  Ans: 366  Answer is right.

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Overrides:

Syntax:

Parameters:

Return Value:

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Example 2

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