import javax.xml.soap.Text;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
public class Main {
public static class Test {
@Override
public boolean equals(Object obj) {
return true;
}
@Override
public int hashCode() {
return 0x100;
}
}
public static void main(String[] args) {
Set<String> sets = new HashSet<>();
sets.add("hello");
sets.add("hello");//内容重复只显示一个
sets.add("world");
Iterator<String> iterator = sets.iterator();
while (iterator.hasNext()){
System.out.println(iterator.next());
}
//测试
System.out.println("--------------");
Set<Test> set = new HashSet<>();
Test test = new Test();
set.add(test);
set.add(test);
set.add((new Test()));
set.add((new Test()));
set.add((new Test()));
Iterator<Test> iteratorA = set.iterator();
while (iteratorA.hasNext()){
System.out.println(iteratorA.next());
}
}
}
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