45 lines
1.2 KiB
Java
45 lines
1.2 KiB
Java
// generics/TupleTest.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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import onjava.*;
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class Amphibian {}
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class Vehicle {}
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public class TupleTest {
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static Tuple2<String, Integer> f() {
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// Autoboxing converts the int to Integer:
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return new Tuple2<>("hi", 47);
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}
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static Tuple3<Amphibian, String, Integer> g() {
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return new Tuple3<>(new Amphibian(), "hi", 47);
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}
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static
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Tuple4<Vehicle, Amphibian, String, Integer> h() {
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return
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new Tuple4<>(
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new Vehicle(), new Amphibian(), "hi", 47);
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}
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static
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Tuple5<Vehicle, Amphibian, String, Integer, Double> k(){
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return new
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Tuple5<>(
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new Vehicle(), new Amphibian(), "hi", 47, 11.1);
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}
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public static void main(String[] args) {
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Tuple2<String, Integer> ttsi = f();
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System.out.println(ttsi);
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// ttsi._1 = "there"; // Compile error: final
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System.out.println(g());
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System.out.println(h());
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System.out.println(k());
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}
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}
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/* Output:
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(hi, 47)
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(Amphibian@139a55, hi, 47)
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(Vehicle@1db9742, Amphibian@106d69c, hi, 47)
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(Vehicle@52e922, Amphibian@25154f, hi, 47, 11.1)
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*/
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