Java File is showing unknown characters

Issue

I am working on an app, But recently one of my Java file showing some unknown characters I also tried changing the encoding of a file but it not working, Is there any way that I can help me to get the file back?

screenshot of the problem I am facing now ...

expect that one file remaining all files are fine

Error Report

error: class, interface, or enum expected   
error: illegal character: '\u2649'  
error: illegal character: '\ufffd'  
error: illegal character: '\u16f6'  
error: illegal character: '\u1a5c'  
error: illegal character: '\uec94'  
error: illegal character: '\u202f'  
error: illegal character: '\u0f0c'  
error: illegal character: '\uf85f'  
error: illegal character: '\ufffd'  
error: illegal character: '\ufffd'  
error: illegal character: '\u2e0a'  
error: illegal character: '\u2976'  
error: illegal character: '\u2b69'  
error: illegal character: '\u33d4'  
error: illegal character: '\u24ed'  
error: illegal character: '\u1ca5'  
error: illegal character: '\u2938'  
error: illegal character: '\ufffd'  
error: illegal character: '\ufffd'  
error: illegal character: '\ufffd'  
error: illegal character: '\u4de6'  

Thanks for help

Solution

When files show random characters like that it usually means there was an error in the compression or convertion of the file. For example, if you take a Word document and open it in Notepad you'll see something similar to that. If you have a backup or another copy I'd recommend trying that version.

Answered By - Ryan Russell