Java 遍历Set

在本文中，我们将了解如何遍历Set。Set是一种不能包含重复元素的集合。它模拟了数学中的集合抽象。

Set接口仅包含从Collection继承的方法，并添加了禁止重复元素的限制。

以下是相同内容的演示-

假设我们的输入是-

Input set: [Java, Scala, Mysql, Python]

期望的输出将会是 −

Iterating over Set using for-each loop:
Java, Scala, Mysql, Python

步骤

Step 1 - START
Step 2 - Declare namely
Step 3 - Define the values.
Step 4 - Create a hashset of values and initialize elements in it using the ‘add’ method.
Step 5 - Display the hashset on the console.
Step 6 - Iterate over the elements of the hashset, and fetch each value.
Step 7 - Display this on the console.
Step 8 - Stop

示例1

在这里，我们将所有的操作绑定在‘main’函数之下。遍历每个项目

import java.util.Set;
import java.util.HashSet;
public class Demo {
   public static void main(String[] args) {
      System.out.println("The required packages have been imported");
      Set<String> input_set = new HashSet<>();
      input_set.add("Java");
      input_set.add("Scala");
      input_set.add("Python");
      input_set.add("Mysql");
      System.out.println("The set is defined as: " + input_set);
      System.out.println("\nIterating over Set using for-each loop:");
      for(String elements : input_set) {
         System.out.print(elements);
         System.out.print(", ");
      }
   }
}

输出

The required packages have been imported
The set is defined as: [Java, Scala, Mysql, Python]

Iterating over Set using for-each loop:
Java, Scala, Mysql, Python,

示例2

在这里，我们将操作封装成展示面向对象编程的函数。迭代器

import java.util.Set;
import java.util.HashSet;
public class Demo {
   static void print_set(Set<String> input_set){
      System.out.println("\nIterating over Set using for-each loop:");
      for(String elements : input_set) {
         System.out.print(elements);
         System.out.print(", ");
      }
   }
   public static void main(String[] args) {
      System.out.println("The required packages have been imported");
      Set<String> input_set = new HashSet<>();
      input_set.add("Java");
      input_set.add("Scala");
      input_set.add("Python");
      input_set.add("Mysql");
      System.out.println("The set is defined as: " + input_set);
      print_set(input_set);
   }
}

输出

The required packages have been imported
The set is defined as: [Java, Scala, Mysql, Python]

Iterating over Set using for-each loop:
Java, Scala, Mysql, Python,