learninginJAVA的专栏

1《import java.util.*2,Scanner

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

要实现线程有两种方法1，实现接口R implements R

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

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); }}

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/

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})(\\

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 =