Java 实例 - 删除集合中指定元素
Java 教程
· 2019-02-11 17:12:55
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：
Main.java 文件
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
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