public class SetMethod {
public static void main(String[] args) {
Set set = new HashSet();
set.add("xdr");
set.add("mike");
set.add("xdr");
set.add("lucy");
set.add(null);
set.add(null);
for (int i = 0; i < 10; i++) {
System.out.println("set=" + set);
}
System.out.println("====迭代器====");
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
Object obj = iterator.next();
System.out.println("obj=" + obj);
}
set.remove(null);
System.out.println("====增强for====");
for (Object o : set) {
System.out.println("o=" + o);
}
}
}