JavaTuples contains() method

The contains() method in org.javatuples is used to check whether a value is present in the TupleClass, given as parameters. This method can be used for any tuple class object of the javatuples library. It returns a boolean value that is true or false based on the presence of that value in the TupleClass.

Method Declaration:

public final boolean contains(Object value)

Syntax:



boolean result = TupleClassObject.contains(X value)

Parameters: This method takes value as parameter where:

  • X– represents the datatype of values in the parameter.
  • TupleClassObject– represents the JavaTuple Class object used like Unit, Quintet, Decade, etc.

Return Value: This method returns true if the parameter value is present in the tuple. Else it returns false

Below programs illustrate the various ways to use contains() method:

Program 1: Using contains() with Unit class:

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// Below is a Java program to create
// a Unit tuple from contains() method
  
import java.util.*;
import org.javatuples.Unit;
  
class GfG {
    public static void main(String[] args)
    {
        // Creating an Unit with one value
        Unit<String> unit = Unit.with("GeeksforGeeks");
  
        // Using contains() method
  
        boolean res;
        String check;
  
        // for True result
        check = "GeeksforGeeks";
        res = unit.contains(check);
  
        System.out.println("Is " + check + " present : " + res);
  
        // for False result
        check = "Geeks";
        res = unit.contains(check);
  
        System.out.println("Is " + check + " present : " + res);
    }
}

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Output:

Is GeeksforGeeks present : true
Is Geeks present : false

Program 2: Using contains() with Decade class:

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// Below is a Java program to create
// a Unit tuple from contains() method
  
import java.util.*;
import org.javatuples.Decade;
  
class GfG {
    public static void main(String[] args)
    {
        // Creating a Decade with 10 value
        Decade<String, String, String, String, String,
               String, String, String, String, String>
            decade = Decade.with("Geeks",
                                 "for",
                                 "Geeks",
                                 "A",
                                 "Computer",
                                 "Science",
                                 "Portal",
                                 "for",
                                 "Geeks",
                                 "RishabhPrabhu");
  
        // Using contains() method
  
        boolean res;
        String check;
  
        // for True result
        check = "GeeksforGeeks";
        res = decade.contains(check);
  
        System.out.println("Is " + check + " present : " + res);
  
        // for False result
        check = "Geeks";
        res = decade.contains(check);
  
        System.out.println("Is " + check + " present : " + res);
    }
}

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Output:

Is GeeksforGeeks present : true
Is Geeks present : false

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



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