Java 泛型演示

package genericDemo;import java.util.Iterator;import java.util.TreeSet;import P3.comparator.ComparatorByName;import p2.bean.Person;public class GenericDemo2 {public static void main(String[] args) {TreeSet<Person> ts=new TreeSet<Person>(new ComparatorByName());//<>内传入引用数据类型 ts.add(new Person("lisi4",21));ts.add(new Person("lisi3",25));ts.add(new Person("lisi2",23));ts.add(new Person("lisi1",24));Iterator<Person>it=ts.iterator();while(it.hasNext()) {Person p=it.next();System.out.println(p.getName()+"..."+p.getAge());}}}