commit b0c76f4d1af96ba63c18417310a3d01f1f313d41
parent 000834cada1e227d61f6ec1f96bb75a9499ca802
Author: Tomas Hlavaty <tom@logand.com>
Date: Sat, 26 Dec 2015 08:27:04 +0100
fix new lines
Diffstat:
1 file changed, 112 insertions(+), 112 deletions(-)
diff --git a/src/jmultimethod/DispatchTest.java b/src/jmultimethod/DispatchTest.java
@@ -1,112 +1,112 @@
-// FLAW: Java reasons about types of variables instead of values
-
-// for asteroid example see wikipedia visitor pattern
-
-package jmultimethod;
-
-public class DispatchTest {
- static class Asteroid {
- String id;
- public Asteroid(String id) {this.id = id;}
- public String id() {return id;}
- }
- static class Spaceship {
- String name;
- public Spaceship(String name) {this.name = name;}
- public String name() {return name;}
- }
- static class Static {
- static void colide(Asteroid x, Asteroid y) {
- System.out.println("AA colide " + x.id() + " with " + y.id());
- }
- static void colide(Asteroid x, Spaceship y) {
- System.out.println("AS colide " + x.id() + " with " + y.name());
- }
- static void colide(Spaceship x, Asteroid y) {
- System.out.println("SA colide " + x.name() + " with " + y.id());
- }
- static void colide(Spaceship x, Spaceship y) {
- System.out.println("SS colide " + x.name() + " with " + y.name());
- }
- static void colide(Object x, Object y) {
- System.out.println("OO colide " + x + " with " + y);
- }
- static void run() {
- run1();
- run2();
- }
- static void run1() {
- System.out.println("Static: explicitly typed");
- Asteroid a1 = new Asteroid("A1");
- Asteroid a2 = new Asteroid("A2");
- Spaceship s1 = new Spaceship("S1");
- Spaceship s2 = new Spaceship("S2");
- colide(a1, a2);
- colide(a1, s1);
- colide(s1, a1);
- colide(s1, s2);
- }
- static void run2() {
- System.out.println("Static: superclass typed");
- // here is a flaw: the variable type should not be
- // specified, it should be infered by the compiler instead
- Object a1 = new Asteroid("A1");
- Object a2 = new Asteroid("A2");
- Object s1 = new Spaceship("S1");
- Object s2 = new Spaceship("S2");
- colide(a1, a2);
- colide(a1, s1);
- colide(s1, a1);
- colide(s1, s2);
- }
- }
- static class Dynamic {
- void colide(Asteroid x, Asteroid y) {
- System.out.println("AA colide " + x.id() + " with " + y.id());
- }
- void colide(Asteroid x, Spaceship y) {
- System.out.println("AS colide " + x.id() + " with " + y.name());
- }
- void colide(Spaceship x, Asteroid y) {
- System.out.println("SA colide " + x.name() + " with " + y.id());
- }
- void colide(Spaceship x, Spaceship y) {
- System.out.println("SS colide " + x.name() + " with " + y.name());
- }
- void colide(Object x, Object y) {
- System.out.println("OO colide " + x + " with " + y);
- }
- void run() {
- run1();
- run2();
- }
- void run1() {
- System.out.println("Dynamic: explicitly typed");
- Asteroid a1 = new Asteroid("A1");
- Asteroid a2 = new Asteroid("A2");
- Spaceship s1 = new Spaceship("S1");
- Spaceship s2 = new Spaceship("S2");
- colide(a1, a2);
- colide(a1, s1);
- colide(s1, a1);
- colide(s1, s2);
- }
- void run2() {
- System.out.println("Dynamic: superclass typed");
- // here is the flaw again: dispatch is on variable type
- // instead of value type
- Object a1 = new Asteroid("A1");
- Object a2 = new Asteroid("A2");
- Object s1 = new Spaceship("S1");
- Object s2 = new Spaceship("S2");
- colide(a1, a2);
- colide(a1, s1);
- colide(s1, a1);
- colide(s1, s2);
- }
- }
- public static void main(String args[]) {
- Static.run();
- new Dynamic().run();
- }
-}
+// FLAW: Java reasons about types of variables instead of values
+
+// for asteroid example see wikipedia visitor pattern
+
+package jmultimethod;
+
+public class DispatchTest {
+ static class Asteroid {
+ String id;
+ public Asteroid(String id) {this.id = id;}
+ public String id() {return id;}
+ }
+ static class Spaceship {
+ String name;
+ public Spaceship(String name) {this.name = name;}
+ public String name() {return name;}
+ }
+ static class Static {
+ static void colide(Asteroid x, Asteroid y) {
+ System.out.println("AA colide " + x.id() + " with " + y.id());
+ }
+ static void colide(Asteroid x, Spaceship y) {
+ System.out.println("AS colide " + x.id() + " with " + y.name());
+ }
+ static void colide(Spaceship x, Asteroid y) {
+ System.out.println("SA colide " + x.name() + " with " + y.id());
+ }
+ static void colide(Spaceship x, Spaceship y) {
+ System.out.println("SS colide " + x.name() + " with " + y.name());
+ }
+ static void colide(Object x, Object y) {
+ System.out.println("OO colide " + x + " with " + y);
+ }
+ static void run() {
+ run1();
+ run2();
+ }
+ static void run1() {
+ System.out.println("Static: explicitly typed");
+ Asteroid a1 = new Asteroid("A1");
+ Asteroid a2 = new Asteroid("A2");
+ Spaceship s1 = new Spaceship("S1");
+ Spaceship s2 = new Spaceship("S2");
+ colide(a1, a2);
+ colide(a1, s1);
+ colide(s1, a1);
+ colide(s1, s2);
+ }
+ static void run2() {
+ System.out.println("Static: superclass typed");
+ // here is a flaw: the variable type should not be
+ // specified, it should be infered by the compiler instead
+ Object a1 = new Asteroid("A1");
+ Object a2 = new Asteroid("A2");
+ Object s1 = new Spaceship("S1");
+ Object s2 = new Spaceship("S2");
+ colide(a1, a2);
+ colide(a1, s1);
+ colide(s1, a1);
+ colide(s1, s2);
+ }
+ }
+ static class Dynamic {
+ void colide(Asteroid x, Asteroid y) {
+ System.out.println("AA colide " + x.id() + " with " + y.id());
+ }
+ void colide(Asteroid x, Spaceship y) {
+ System.out.println("AS colide " + x.id() + " with " + y.name());
+ }
+ void colide(Spaceship x, Asteroid y) {
+ System.out.println("SA colide " + x.name() + " with " + y.id());
+ }
+ void colide(Spaceship x, Spaceship y) {
+ System.out.println("SS colide " + x.name() + " with " + y.name());
+ }
+ void colide(Object x, Object y) {
+ System.out.println("OO colide " + x + " with " + y);
+ }
+ void run() {
+ run1();
+ run2();
+ }
+ void run1() {
+ System.out.println("Dynamic: explicitly typed");
+ Asteroid a1 = new Asteroid("A1");
+ Asteroid a2 = new Asteroid("A2");
+ Spaceship s1 = new Spaceship("S1");
+ Spaceship s2 = new Spaceship("S2");
+ colide(a1, a2);
+ colide(a1, s1);
+ colide(s1, a1);
+ colide(s1, s2);
+ }
+ void run2() {
+ System.out.println("Dynamic: superclass typed");
+ // here is the flaw again: dispatch is on variable type
+ // instead of value type
+ Object a1 = new Asteroid("A1");
+ Object a2 = new Asteroid("A2");
+ Object s1 = new Spaceship("S1");
+ Object s2 = new Spaceship("S2");
+ colide(a1, a2);
+ colide(a1, s1);
+ colide(s1, a1);
+ colide(s1, s2);
+ }
+ }
+ public static void main(String args[]) {
+ Static.run();
+ new Dynamic().run();
+ }
+}
