OnJava8-Examples/com/mindviewinc/util/FourTuple.java

// com/mindviewinc/util/FourTuple.java
package com.mindviewinc.util;

public class FourTuple<A, B, C, D>
  extends ThreeTuple<A, B, C> {
  public final D fourth;
  public FourTuple(A a, B b, C c, D d) {
    super(a, b, c);
    fourth = d;
  }
  @Override
  public String toString() {
    return "(" + first + ", " + second + ", " +
      third + ", " + fourth + ")";
  }
}