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JavaTuples hashcode() method

  • Last Updated : 30 Aug, 2018

The hashCode() method in org.javatuples method returns the hash code for the JavaTuple class object. The hashcode is always the same if the object doesn’t change. Hashcode is a unique code generated by the JVM at time of object creation. It can be used to perform some operation on hashing related algorithm like hashtable, hashmap etc. An object can also be searched with this unique code.

Method Declaration:

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public final int hashCode()

Syntax:

int code = TupleClassObject.hashCode()

Here TupleClassObject represents the JavaTuple Class used like Unit, Quartet, Decade, KeyValue, etc.



Returns: It returns an integer value which represents hashCode value for this TupleClassObject.

Below program illustrates hashcode() method of TupleClassObject:
Program 1: Get the hash code of a Quartet Class object.




// Below is a Java program to use hashCode()
// with a LabelValue tuple
  
import java.util.*;
import org.javatuples.Quartet;
  
class GfG {
    public static void main(String[] args)
    {
        // Creating a Quartet with 4 values
        Quartet<Integer, String, String, Double> quartet
            = Quartet.with(Integer.valueOf(1),
                           "GeeksforGeeks",
                           "A computer portal",
                           Double.valueOf(20.18));
  
        // Using the hashCode() method
        int code = quartet.hashCode();
  
        // Printing the returned hashCode
        System.out.println(code);
    }
}

Output:

-1296686340

Program 2: Get the hash code of a LabelValue Class object.




// Below is a Java program to use hashCode()
// with a LabelValue tuple
  
import java.util.*;
import org.javatuples.LabelValue;
  
class GfG {
    public static void main(String[] args)
    {
        // Creating a LabelValue object
        LabelValue<Integer, String> lv
            = LabelValue.with(Integer.valueOf(1),
                              "A computer science portal");
  
        // Using the hashCode() method
        int code = lv.hashCode();
  
        // Printing the returned hashCode
        System.out.println(code);
    }
}

Output:

-1587127699

Note: Similarly, it can be used with any other JavaTuple Class.




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