java¼¯ºÏSet²Ù×÷
package Sets;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;
/**
* java¼¯ºÏ²Ù×÷
*
* @author baby69yy2000
*
*/
public class Sets {
/** Çó²¢¼¯ */
public static <T> Set<T> union(Set<T> setA, Set<T> setB) {
Set<T> setUnion;
if (setA instanceof TreeSet)
setUnion = new TreeSet<T>();
else
setUnion = new HashSet<T>();
Iterator<T> iterA = setA.iterator();
while (iterA.hasNext())
setUnion.add(iterA.next());
Iterator<T> iterB = setB.iterator();
while (iterB.hasNext())
setUnion.add(iterB.next());
return setUnion;
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