1.对list进行排序,list中的参数类型是Stirng,参数的格式不完全一样,例如有null,"","51003","510020"等 public static void main(String args[]){ List<String> list = new ArrayList<>(); list.add("51003"); list.add("510020"); list.
题目描述: Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input cases. Notes: It is intended for this problem to
/* * Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package java.lang; import java.io.ObjectStreamClass;import java.io.ObjectStreamField;import java.
String类定义实现了java.io.Serializable, Comparable<String>, CharSequence 三个接口:并且为final修饰. public final class String defined String由char[]数组实现 /** The value is used for character storage. */ private final char value[]; /** Cache the hash code for the strin
String类的申明 public final class String implements java.io.Serializable, Comparable<String>, CharSequence {…} String类用了final修饰符,表示它不可以被继承,同时还实现了三个接口, 实现Serializable接口表示String类可被序列化:实现Comparable<T> 接口主要是提供一个compareTo 方法用于比较String字符串:还实现了CharSequen