以下实例演示了如何使用 Collection 类的 collection.remove() 方法来删除集合中的指定的元素:
- /*
- author by shouce.ren
- Main.java
- */
- import java.util.*;
- public class Main {
- public static void main(String [] args) {
- System.out.println( "集合实例!\n" );
- int size;
- HashSet collection = new HashSet ();
- String str1 = "Yellow", str2 = "White", str3 =
- "Green", str4 = "Blue";
- Iterator iterator;
- collection.add(str1);
- collection.add(str2);
- collection.add(str3);
- collection.add(str4);
- System.out.print("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("现在集合的数据是: ");
- iterator = collection.iterator();
- while (iterator.hasNext()){
- System.out.print(iterator.next() + " ");
- }
- System.out.println();
- size = collection.size();
- System.out.println("集合大小: " + size + "\n");
- }
- }
以上代码运行输出结果为:
- 集合实例!
- 集合数据: White Yellow Blue Green
- 删除之后 [White]
- 现在集合的数据是: Yellow Blue Green
- 集合大小: 3