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Example.java
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Example.java
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import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
public class Example
{
public static void main(String[] args) throws IOException{
(new Example()).test(args.length);
BufferedReader buffer = new BufferedReader(
new InputStreamReader(System.in)
);
String line=buffer.readLine();
sanitize(line);
String result = args[0] + line;
System.out.println(result);
}
static void sanitize(Object o) {
}
void test(int l) {
Animal a;
if (l == 0)
a = new Cat();
else
a = new Dog();
a.play();
Cat c1 = new Cat();
Cat c2 = new Cat();
c1.setParent(c2);
morePlay(c1);
}
void morePlay(Cat c) {
Cat p = c.getParent();
p.play();
Animal a1 = p.playWith(c);
Animal a2 = c.playWith(p);
// otherwise assignment to return variables is ignored
if (a1 == a2) return;
}
}
class Animal {
void play() {}
Animal playWith(Animal other) {
other.play();
return other;
}
}
class Cat extends Animal {
Cat parent;
void setParent(Cat c) {
this.parent = c;
}
Cat getParent() {
return this.parent;
}
void play() {}
}
class Dog extends Animal {
void play() {}
}