Java示例集合删除 Java示例只读集合 反转集合的Java示例 Java示例集合删除 import java.util.*; public class CollectionTest { public static void main(String [] args) { System.out.println( "Collection Example!\n" ); int size; HashSet <String>collection = new HashSet <String>(); 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"); } } Java示例只读集合 反转集合的Java示例