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JavaTuples with() method

Last Updated : 11 Jul, 2025
The with() method in org.javatuples is used to instantiate a tuple in a semantically elegant way, with the values given as parameters. This method can be used for any tuple class object of the javatuples library. This method is a static function in each javatuple class and it returns the tuple class object of the called class, with the values initialized by the corresponding values in the arguments. Syntax: 
public static <A, B, ..> <em>TupleClass<A, B, ..> with(A a, B b, ..)
Parameters: This method takes n values as parameters where:
  • n- represents the number of values based on the TupleClass (Unit, Pair, etc) used.
  • A a- represents the type for 1st value in A and its corresponding value in a.
  • B b- represents the type for 2nd value in B and its corresponding value in b.
    • . . and so on.
Return Value: This method returns the object of TupleClass, which calls the method, with the values passed as the parameters. Exceptions: This method throws a RuntimeException in the following cases:
  • When the values passed do not match their expected types in TupleClass
  • When the number of values passed are lesser than expected in TupleClass
  • When the number of values passed are more than expected in TupleClass
Below programs illustrate the various ways to use with() methods: Program 1: When the with() method is used correctly, here with Unit class: Output: 
[GeeksforGeeks]
Program 2: When the values passed do not match their expected types: Output: 
Exception in thread "main" java.lang.RuntimeException: 
Uncompilable source code - incompatible types: inference variable A has incompatible bounds
 equality constraints: java.lang.Integer
 lower bounds: java.lang.Double
 at MainClass.GfG.main]
Program 3: When the number of values passed are lesser than expected: Output: 
Exception in thread "main" java.lang.RuntimeException: 
Uncompilable source code - Erroneous sym type: org.javatuples.Quartet.with
 at MainClass.GfG.main
Program 4: When the number of values passed are more than expected:
Output: 
Exception in thread "main" java.lang.RuntimeException: 
Uncompilable source code - Erroneous sym type: org.javatuples.Quartet.with
 at MainClass.GfG.main

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