在Java编程中，如何从集合中删除指定的元素？
以下示例演示如何使用Collection类的collection.remove()方法从集合中删除某个元素。
package com.yiibai; import java.util.*; public class CollectionRemoval { public static void main(String[] args) { System.out.println("Collection Example!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("Collection data: "); iterator = collection.iterator(); while (iterator.hasNext()) { System.out.print(iterator.next() + " "); } System.out.println(); collection.remove(str2); System.out.println("After removing [" + str2 + "]n"); System.out.print("Now collection data: "); iterator = collection.iterator(); while (iterator.hasNext()) { System.out.print(iterator.next() + " "); } System.out.println(); size = collection.size(); System.out.println("Collection size: " + size + "n"); } }
上述代码示例将产生以下结果。
Collection Example! Collection data: White Yellow Blue Green After removing [White] Now collection data: Yellow Blue Green Collection size: 3
