LinkedHashSet类

最新推荐文章于 2022-08-08 23:48:00 发布

转载最新推荐文章于 2022-08-08 23:48:00 发布 · 559 阅读

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本文介绍了Java中集合框架的基本概念，并重点探讨了如何使用LinkedHashSet集合，包括其特性、实现方式以及如何在实际场景中应用。

package ch3;

public class Student {
    private int age;
    private String name;
    Student(int num,String name)
    {
    	this.age =num;
    	this.name =name;
    }
	@Override
	public boolean equals(Object o) {
		// TODO Auto-generated method stub
		Student s =(Student)o;
		return  age ==s.age&&name.equals(s.name);
	}
	@Override
	public int hashCode() {
		// TODO Auto-generated method stub
		return age*name.hashCode();
	}
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return "age:" +age+"name:"+name;
					}
    
}

package ch3;

import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;

public class LinkedHashSetText {
public static void main(String[] args) {
	Set<Student>  linkHashSet = new LinkedHashSet<Student>();
	Student s1 = new Student(18,"zhj");
	Student s2 = new Student(25,"zyj");
	Student s3 = new Student(28,"xml");
	Student s4 = new Student(18,"zah");
	Student s5 = new Student(18,"zah");//有序，不能重复
	linkHashSet.add(s1);
	linkHashSet.add(s2);
	linkHashSet.add(s3);
	linkHashSet.add(s4);
	linkHashSet.add(s5);
	linkHashSet.add(null);
	
	Iterator in = linkHashSet.iterator();
	while(in.hasNext())
	{
		System.out.println(in.next());
	}
	
	
	
}
}