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File IO

import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; public class FileIOApp {   public static void main(String args[]) throws IOException {     FileOutputStream outStream = new FileOutputStream("test.txt");     String s = "This is a test.";     for (int i = 0; i < s.length(); ++i)       outStream.write(s.charAt(i));     outStream.close();     FileInputStream inStream = new FileInputStream("test.txt");     int inBytes = inStream.available();     System.out.println("inStream has " + inBytes + " available bytes");     byte inBuf[] = new byte[inBytes];     int bytesRead = inStream.read(inBuf, 0, inBytes);     System.out.println(bytesRead + " bytes were read");     System.out.println("They are: " + new String(inBuf));     inStream.close();     File f = new File("test.txt");     f.delete();   } }