Here you can find the source of contains(List> objects, Object object)
public static boolean contains(List<?> objects, Object object)
//package com.java2s; //License from project: Open Source License import java.util.List; public class Main { public static boolean contains(List<?> objects, Object object) { boolean contains = objects.contains(object); return contains; }/* ww w . j a va 2s . c o m*/ }