public class Student {
String name;
int age;
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public int getAge() {
    return age;
}
public void setAge(int age) {
    this.age = age;
}
public Student(String name, int age) {
    super();
    this
 
.name = name;
    this.age = age;
}
@Override
public String toString() {
    return "Student [name=" + name + ", age=" + age + "]";
}

}

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;


public class StudentTest {

    public static void main(String[] args) {
        Set
 
<Student>set=new HashSet<Student>(); 
set.add(new Student("a", 100));
set.add(new Student("b", 90));
set.add(new Student("c", 80));
set.add(new Student("d", 65));
set.add(new Student("e", 55));

Iterator<Student>ite=set.iterator();
while(ite.hasNext()){
    Student s=ite.next();
    if
 
(s.age<60){
        ite.remove();
    }
}

System.out.println(set);
    }

}

叠代器遍歷數組