如何用 Java 打印 LinkedHashSet 元素？

原文:https://www . geesforgeks . org/how-print-link edhashset-elements-in-Java/

linked HashSet是 HashSet 的子类，其中不允许重复，但插入顺序保持不变。元素按照插入的顺序打印。

*有几种方法可以打印 LinkedHashSet 元素:*

By simply printing elements By using the enhanced for loop Use iterator 使用阵列。tostring()* Use to print the LinkedHashSet elements with custom class objects. toString() method of object classT21】

*方法一:简单打印元素到控制台*

Let's make an example of LinkedHashSet, add elements to it, and simply print it to the console. One method is to simply print the name of the Collection object, and then print the contents of the LinkedHashSet.

Java

// Java program to print the elements of LinkedHashSet

import java.util.*;
class GfG {
    public static void main(String args[])
    {

        // Creating an instance of LinkedHashSet
        LinkedHashSet<String> hs = new LinkedHashSet<>();

        // Adding elements to the LinkedHashSet
        hs.add("Hey");
        hs.add("How");
        hs.add("are");
        hs.add("You");

        // Printing
        System.out.println(hs);
    }
}

*输出*

[Hey, How, are, You]

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