import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Base64;
import java.util.List;

public class FilesReadFileExample {

	public static void main(String[] args) {
		
		Path path = Paths.get("infile.jks");
        Path outpath = Paths.get("outfile.jks");
		try {
			byte[] bs = Files.readAllBytes(path);
			// List<String> strings = Files.readAllLines(path, StandardCharsets.UTF_8);
			String plaintxt = new String(bs);
			System.out.println("Read bytes: \n"+new String(bs));
			System.out.println("Read lines: \n"+plaintxt);
            
            byte[] asBytes = Base64.getDecoder().decode(bs); 
            // String base64Decoded = new String(asBytes, StandardCharsets.UTF_8); 
            // System.out.println("Base64 decoded text: " + base64Decoded);

            
            Path writtenFilePath = Files.write(outpath, asBytes);
            System.out.println("writtenFilePath: \n"+writtenFilePath.toAbsolutePath());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}