[Java] [24] removal space

text:

1, both spaces removed 

str.trim() 

2, remove all spaces ①

replace(" ", "")

3, remove all spaces ②

replaceAll(" +","")

4, to replace most blank characters,  \ S  which can match any spaces, tabs, page breaks, etc. a whitespace

replaceAll("\\s*", "")

5, the code to remove spaces

public String remove(String resource,char ch)   
{   
    StringBuffer buffer=new StringBuffer();   
    int position=0;   
    char currentChar;   

    while(position<resource.length())   
    {   
        currentChar=resource.charAt(position++);   
        if(currentChar!=ch) buffer.append(currentChar); 
    } 

    return buffer.toString();   
}  

Reference blog:

JAVA in strips spaces - Alamps - blog Park
https://www.cnblogs.com/alamps/archive/2012/04/27/2473694.html