Java 实例 - 删除集合中指定元素
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 phpcodeweb.com
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