搜索ArrayList的元素

 

import java.util.ArrayList;

 /** 来 自 时 代 J a v a**/

public class Main {

  public static void main(String[] args) {

    ArrayList arrayList = new ArrayList();

   

    arrayList.add("1");

    arrayList.add("2");

    arrayList.add("3");

    arrayList.add("4");

    arrayList.add("5");

    arrayList.add("1");

    arrayList.add("2");

 

    boolean blnFound = arrayList.contains("2");

    System.out.println("Does arrayList contain 2 ? " + blnFound);// 来自 n o w j a v a . c o m

 

    int index = arrayList.indexOf("4");

    if(index == -1)

      System.out.println("ArrayList does not contain 4");

    else

      System.out.println("ArrayList contains 4 at index :" + index);

     

    int lastIndex = arrayList.lastIndexOf("1");