tuple.java

看thinkinjava学习java时

package myutils;


public class Tuple {
	public static<A, B> TwoTuple<A,B> tuple(A a, B b){
		return new  TwoTuple<A,B>(a, b);
		
	}
public static<A, B, C> ThreeTuple<A, B, C> tuple(A a, B b, C c){
	return new  ThreeTuple <A, B, C>(a, b ,c);
	}
public static<A, B ,C ,D> FourTuple<A, B ,C ,D> tuple(A a, B b, C c,D d){
	return new  FourTuple <A, B, C, D>(a, b ,c ,d);
}
public static<A, B ,C ,D, E> FiveTuple<A, B ,C ,D, E> tuple(A a, B b, C c ,D d, E e){
	return new  FiveTuple <A, B, C, D, E>(a, b ,c ,d,e);
}

}

class TwoTuple<A,B>{
	public final A first;
	public final B second;
	public TwoTuple(A a, B b){first = a; second = b;}
	public String toString(){
		return "(" + first + ", " + second + ")";
	}
}
 
class ThreeTuple<A, B, C> extends TwoTuple<A,B>{
	public final C third;
	public ThreeTuple(A a, B b, C c){
		super(a, b);
		third = c;
	}
	public String toString(){
		return "(" + first + ", " + second + ", " + third +  ")";
	}
}
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;
	}
	public String toString(){
		return "(" + first + ", " + second + ", "+ third + Fourth + ")";
	}
}

class FiveTuple<A, B, C, D, E> extends FourTuple<A, B, C, D>{
	public final E fifth;
	public FiveTuple(A a, B b, C c,D d, E e){
		super(a, b, c, d);
		fifth = e;
	}
	public String toString(){
		return "(" + first + ", " + second + ", "+ third + Fourth +  fifth + ")";
	}
}