learninginJAVA的专栏

package zhihu_scrapy; import java.io.*; import java.net.*; import java.util.regex.*; /*实现爬取只爬取的所有岗位中，只保存前端的岗位*/ public class Intern_test { public static String open(String url){ BufferedReader in =

import java.util.regex.Matcher; import java.util.regex.Pattern; public class isIpv4 { public static boolean par(String str){ int count=0; Pattern p=Pattern.compile("(\\d{1,3})(\\.)(\\d{1,3})(\\

public class WebEmail { public static void main(String[] args){ int i=0; StringBuffer s=new StringBuffer(); StringBuffer s1=new StringBuffer(); try{ FileReader fb=new FileReader("C:/Users/

public class Practice { public static void main(String[] args){ p("111".matches("\\d{3}")); p("1111".matches("\\d{1,3}")); } public static void p(Object o){ System.out.println(o); } }

package shujujiegou; public class binarySearch { public int go(int[] array,int m){ int begin_p=0; int end_p=array.length; while(begin_p<=end_p){//这里如果没找到会break，比用true好！ int half=(begin_p+en

要实现线程有两种方法 1，实现接口 R implements R

import java.io.*;//第一个自制实用程序 import java.util.*; public class Review{ int test;//成员变量 public static void main(String[] args){ int test;//局部变量 FileReader fr1,fr2; BufferedReader bf1,bf2; String

1《import java.util.* 2,Scanner