How to convert FileInputStream into string in java?

Question

In my java project, I'm passing FileInputStream to a function, I need to convert (typecast FileInputStream to string), How to do it.??

public static void checkfor(FileInputStream fis) {    String a=new String;    a=fis         //how to do convert fileInputStream into string    print string here } 

Answer 1

You can't directly convert it to string. You should implement something like this Add this code to your method

    //Commented this out because this is not the efficient way to achieve that     //StringBuilder builder = new StringBuilder();     //int ch;     //while((ch = fis.read()) != -1){     //  builder.append((char)ch);     //}     //               //System.out.println(builder.toString()); 

Use Aubin's solution:

public static String getFileContent(    FileInputStream fis,    String          encoding ) throws IOException  {    try( BufferedReader br =            new BufferedReader( new InputStreamReader(fis, encoding )))    {       StringBuilder sb = new StringBuilder();       String line;       while(( line = br.readLine()) != null ) {          sb.append( line );          sb.append( '\n' );       }       return sb.toString();    } } 

Answer 2

public static String getFileContent(    FileInputStream fis,    String          encoding ) throws IOException  {    try( BufferedReader br =            new BufferedReader( new InputStreamReader(fis, encoding )))    {       StringBuilder sb = new StringBuilder();       String line;       while(( line = br.readLine()) != null ) {          sb.append( line );          sb.append( '\n' );       }       return sb.toString();    } }