java.util.Vector.lastIndexOf(Object elem,int index) 方法示例 Java.util.Observable.notifyObservers() 方法 Java.util.Observable.notifyObservers(Object arg) 方法 java.util.Vector.lastIndexOf(Object elem,int index) 方法示例 package com.codingdict; import java.util.Vector; public class VectorDemo { public static void main(String[] args) { // create an empty Vector vec with an initial capacity of 4 Vector<Integer> vec = new Vector<Integer>(6); // use add() method to add elements in the vector vec.add(4); vec.add(3); vec.add(2); vec.add(1); vec.add(2); vec.add(1); /**let us print the last index of 1 * starting search from 4th position */ System.out.println("index is: "+vec.lastIndexOf(1,4)); } } Java.util.Observable.notifyObservers() 方法 Java.util.Observable.notifyObservers(Object arg) 方法