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:

// 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); 
    } 
} 

Output:

Is GeeksforGeeks present : true
Is Geeks present : false

Program 2: Using contains() with Decade class:

// 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); 
    } 
} 

Output:

Is GeeksforGeeks present : true
Is Geeks present : false

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

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