Implement Pair Class with Unit Class in Java using JavaTuples
To implement a Pair class with a Unit class in Java using JavaTuples, you can use the Pair class provided by the library and create a new Unit class that extends the Unit class provided by the library.
Here is an example implementation:
Here is an example Java code that uses the MyPair class with MyUnit and displays the output:
Java
import org.javatuples.Pair; import org.javatuples.Unit; public class Main { public static void main(String[] args) { MyPair<String, Integer> pair1 = new MyPair<>( "John" , 42 ); MyPair<MyUnit, Integer> pair2 = new MyPair<>( new MyPair.MyUnit(), 10 ); System.out.println( "Pair 1: " + pair1); System.out.println( "Pair 2: " + pair2); String name = pair1.getValue0(); int age = pair1.getValue1(); System.out.println(name + " is " + age + " years old." ); } public static class MyPair<A, B> extends Pair<A, B> { public MyPair(A a, B b) { super (a, b); } public static class MyUnit extends Unit { public MyUnit() { super (); } } } } |
Output:
Pair 1: (John, 42)
Pair 2: (( ), 10)
John is 42 years old.
A Pair is a Tuple from the JavaTuples library that deals with 2 elements. Since this Pair is a generic class, it can hold any type of value in it. A Unit is a Tuple from the JavaTuples library that deals with only 1 element. Since this Unit is a generic class, it can hold any type of value in it.
Different Ways to implement Pair Class with Unit Class
- Using direct values
- Using add() method of Unit class
- Using addAtX() method of Unit class
Method 1: Using Direct Values
Example:
Java
// Java Program to Implement Pair // Class with Unit Class // Using JavaTuples Via Direct Values // Importing required classes import java.util.*; import org.javatuples.*; // Main class class GFG { // Main driver method public static void main(String[] args) { // Creating a Unit Unit<String> unit = new Unit<String>( "GeeksforGeeks" ); // Printing unit System.out.println( "Unit: " + unit); // Creating Pair from Unit Pair<Integer, String> pair = new Pair<Integer, String>(Integer.valueOf( 1 ), unit.getValue0()); // Printing the Pair System.out.println( "Pair: " + pair); } } |
Output:
Unit: [GeeksforGeeks] Pair: [1, GeeksforGeeks]
Method 2: Using add() Method of Unit class
Example:
Java
// Java Program to Implement Pair Class with Unit Class // use of add() method with Single Value // Importing required classes import java.util.*; import org.javatuples.*; // Main class class GFG { // Main driver method public static void main(String[] args) { // Instantiate unit object // using with() method Unit<String> unit = Unit.with( "Geeks" ); // Printing unit System.out.println( "Unit: " + unit); // Create Pair Using add() method Pair<String, String> pair = unit.add( "forGeeks" ); // Print the Pair System.out.println( "Pair: " + pair); } } |
Output:
Unit: [Geeks] Pair: [Geeks, forGeeks]
Method 3: Using addAtX() method of Unit class
Example 1: Adding Unit at Position 0 using addAt0()
Java
// Java program to Implement Pair Class with Unit Class // By using of addAt0() method with Direct Value // Importing required classes import java.util.*; import org.javatuples.Pair; import org.javatuples.Unit; // Main class class GFG { // Main driver method public static void main(String[] args) { // Instantiate unit object // using with() method Unit<String> unit = Unit.with( "Geeks" ); // Printing unit System.out.println( "Unit: " + unit); // Creating Pair using addAtX() method Pair<String, String> pair = unit.addAt0( "forGeeks" ); // Printing the Pair System.out.println( "Pair: " + pair); } } |
Output:
Unit: [Geeks] Pair: [forGeeks, Geeks]
Example 2: Adding Unit at Position 1 using addAt1()
Java
// Java program to Implement // Pair Class with Unit Class // Via addAt1() method with // Direct Value // Importing required classes import java.util.*; import org.javatuples.Pair; import org.javatuples.Unit; // Main class class GFG { // Main driver method public static void main(String[] args) { // Instantiate unit object // using with() method Unit<String> unit = Unit.with( "Geeks" ); // Printing Unit System.out.println( "Unit: " + unit); // Creating Pair // Using addAtX() method Pair<String, String> pair = unit.addAt1( "forGeeks" ); // Printing the Pair System.out.println( "Pair: " + pair); } } |
Output:
Unit: [Geeks] Pair: [Geeks, forGeeks]
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