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.