String comparison returns wrong result

Question

I trying to compare 2 strings in Java to determine if they are the same:

System.out.println("app version: "+ appversion + " latest version: "+ latestversion); 

if(!appversion.equals(latestversion))
{            
    System.out.println("not the same"); 
}

However this is giving me unexpected results given the outputs:

app version: v1.1.2 latest version: v1.1.2
not the same

I have used .replaceAll("\\\\s",""); to remove any whitespaces from the strings with no success.

There is probably a very obvious answer to this but can anyone tell me what i'm doing wrong?

Answer 1

您是否尝试在两个字符串上使用.trim（）？

Answer 2

Instead of .replaceAll() method, use trim() method to remove white space while comparing String variables.

change your code as follows as,

if(!appversion.trim().equals(latestversion.trim()))
{            
    System.out.println("not the same"); 
}

Answer 3

buddy try this

System.out.println("app version: "+ appversion.trim() + " latest version:"+latestversion.trim()); 

if(!appversion.trim().equals(latestversion.trim()))
{            
    System.out.println("not the same"); 
} 

Answer 4

Code is running fine:-

 String appversion=" v1.1.2";
      String latestversion=" v1.1.2";
      if(!appversion.equals(latestversion))
      {            
      System.out.println("not the same"); 
      }

Or you can use:-

if(!appversion.trim().equals(latestversion.trim()))