Java regular expression implements extracting the required characters and putting them into an array [ArrayList array deduplication function]

The example of this article describes the implementation of java regular expression to extract the required characters and put them into an array. Share it with everyone for your reference, the details are as follows:

Here is a demonstration of the Java regular expression to extract the required characters and put them into an array, that is, the ArrayList array deduplication function.

The specific code is as follows:

package com.test.tool;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.regex.*;
public class MatchTest {
  public static void main(String[] args)
  {
    String regex = "[0-9]{5,12}";
    String input = "QQ120282458，QQ120282458 QQ125826";
    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(input);
    ArrayList al=new ArrayList();
    while (m.find()) {
      al.add(m.group(0));
    }
    System.out.println("去除重复值前");
    for (int i=0;i<al.size();i++)
    {
      System.out.println(al.get(i).toString());
    }
    //去除重复值
    HashSet hs=new HashSet(al);
    al.clear();
    al.addAll(hs);
    System.out.println("去除重复值后");
    for (int i=0;i<al.size();i++)
    {
      System.out.println(al.get(i).toString());
    }
  }
}

The output result is:

去除重复值前
120282458
120282458
125826
去除重复值后
125826
120282458

Improved version: Make it into a bean:

package com.test.tool;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.regex.*;
public class MatchTest {
  private String regex;
  private String input;
  private ArrayList al;
  public String getRegex() {
    return regex;
  }
  public void setRegex(String regex) {
    this.regex = regex;
  }
  public String getInput() {
    return input;
  }
  public void setInput(String input) {
    this.input = input;
  }
  public ArrayList getAl() {
    return al;
  }
  public void setAl(ArrayList al) {
    this.al = al;
  }
  public MatchTest(String regex,String input)
  {
    Pattern p=Pattern.compile(regex);
    Matcher m=p.matcher(input);
    ArrayList myal=new ArrayList();
    while (m.find())
    {
      myal.add(m.group());
    }
    HashSet hs=new HashSet(myal);
    myal.clear();
    myal.add(hs);
    this.setRegex(regex);
    this.setInput(input);
    this.setAl(myal);
  }
  public MatchTest(){}
  public static void main(String[] args){
     String regex1 = "[0-9]{5,12}";
     String input1="QQ120282458，QQ120282458 QQ125826";
     //String input1="QQ";
    MatchTest mt=new MatchTest(regex1,input1);
    for (int i=0;i<mt.getAl().size();i++)
    {
      System.out.println(mt.getAl().get(i).toString());
    }
  }
}

I hope this article will be helpful to everyone in java programming.

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