java.util.Vector.removeRange() java.util.Vector.removeElementAt() java.util.Vector.retainAll() 描述 removeRange(int fromIndex,int toIndex)方法被用来去除从名单其索引之间fromIndex(包括)元素范围为独占的所有元素。 声明 以下是java.util.Vector.removeRange()方法的声明 protected void removeRange(int fromIndex,int toIndex) 参数 fromIndex - 这是要删除的第一个元素的索引。 toIndex - 这是要删除的最后一个元素之后的索引 返回值 NA 异常 NA 实例 以下示例显示了java.util.Vector.removeRange()方法的用法。 package com.tutorialspoint; import java.util.Vector; public class VectorDemo { public static void main(String[] args) { // create an empty Vector vec with an initial capacity of 7 Vector<Integer> vec = new Vector<Integer>(7); // use add() method to add elements in the vector vec.add(1); vec.add(2); vec.add(3); vec.add(4); vec.add(5); vec.add(6); vec.add(7); /** * Removing range of elements is not directly supported. However, it * can be done by using subList and clear methods. */ System.out.println("Remove elements from 2nd to 4th"); vec.subList(2,4).clear(); // let us print all the elements available in vector System.out.println("Numbers after removal :- "); for (Integer number : vec) { System.out.println("Number = " + number); } } } 让我们编译并运行上面的程序,这将产生以下结果。 Remove elements from 2nd to 4th Numbers after removal :- Number = 1 Number = 2 Number = 5 Number = 6 Number = 7 java.util.Vector.removeElementAt() java.util.Vector.retainAll()