1)Which code fragment would correctly identify the number of arguments passed via the command line to a Java application, excluding the name of the class that is being invoked? 哪个代码片段可以正确地标识通过命令行传递给Java应用程序的参数的数量,而不包括正在调用的类的名称? A)int count=0; while (
在API源码中,String的compareTo其实就是一次比较两个字符串的ASCII码.如果两个字符串的ASCII相等则继续后续比较,否则直接返回两个ASCII的差值.如果两个字符串完全一样,则返回0.下面是源码: public int compareTo(String anotherString) { int len1 = count; int len2 = anotherString.count; //获取到两个字符串的较短的长度 int n = Math.min(len1, len2);
String的compareTo其实就是依次比较两个字符串ASC码.如果两个字符的ASC码相等则继续后续比较,否则直接返回两个ASC的差值.如果两个字符串完全一样,则返回0.来看一下代码. public int compareTo(String anotherString) { int len1 = count; int len2 = anotherString.count; //获取到两个字符串的较短的长度 int n = Math.min(len1, len2); char v1[] = v
Set Set接口--数据存放无序,非常简单,主要呈现信息列表 Set接口存储一组唯一.无序的对象 HashSet是Set接口常用的实现类 Set接口不存在get方法 Iterator接口:表示对集合进行迭代的迭代器 hasNext():表示判断是否还有元素可以迭代 next():方法:返回迭代的下一个元素 HashMap public static void main(String[] args) { //存储数据的载体 Set set = new HashSet<>(); set.add(
F. String Set Queries time limit per test:3 seconds memory limit per test:768 megabytes input:standard input output:standard output You should process m queries over a set D of strings. Each query is one of three kinds: Add a string s to the set D. I
ou should process m queries over a set D of strings. Each query is one of three kinds: Add a string s to the set D. It is guaranteed that the string s was not added before. Delete a string s from the set D. It is guaranteed that the string s is in th
