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GenericPairs0.java
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50 lines (34 loc) · 877 Bytes
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import java.util.*;
class Pair<T, S>{
private final T first;
private final S second;
public Pair(T f, S s) {
first = f;
second = s;
}
public T getFirst() {
return first;
}
public S getSecond() {
return second;
}
public String toString() {
return "(" + first.toString() + ", " + second.toString() + ")";
}
}
class GenericPairs0 {
public void printLines(List<String> strings) {
for (String s: strings) {
System.out.println( s );
}
}
public void printObjects(List<? extends Object> objects) {
for (Object s: objects) {
System.out.println( s );
}
}
public static void main(String[] args) {
Pair<String, String> first = new Pair<String, String>("hello", "world");
System.out.println( first.toString() );
}
}