Java如何删除集合中指定元素

实现思路：
       集合中删除元素可使用collection.remove() 方法

例:

import java.util.*;

public class testClass{
   public static void main(String [] args) {   
      System.out.println( "创建集合\n" ); 

      int size;
      HashSet collection = new HashSet ();
      String str1 = "java265.com-1", str2 = "java265-2", str3 = 
      "java265-3", str4 = "java265-4";  
       
      Iterator iterator;
      collection.add(str1);    
      collection.add(str2);   
      collection.add(str3);   
      collection.add(str4);
      System.out.print("输出集合数据: ");  
       
      iterator = collection.iterator();     
      while (iterator.hasNext()){
         System.out.print(iterator.next() + " ");  
      }
      System.out.println();
        
      collection.remove(str2);
      System.out.println("删除之后 [" + str2 + "]\n");

      System.out.print("删除后的集合数据: ");
      iterator = collection.iterator();     
      while (iterator.hasNext()){
         System.out.print(iterator.next() + " ");  
      }
      System.out.println();
      size = collection.size();
      System.out.println("新集合大小: " + size + "\n");
   }
}