2011.5.20 DataInputStream mark/reset method demo

Here a an example code which demonstrates the problem (in the JAR file a have a 20 bytes long file (afile) with byte values running from 0-19

 

 

-------------------------------------------import java.io.*;import javax.microedition.midlet.*;public class Main extends MIDlet{public Main(){}public void startApp(){try{InputStream is = getClass().getResourceAsStream("/afile");DataInputStream dis = new DataInputStream(is);int value;// Should print "0 1 2 "for(int i = 0; i < 3; i++){value = dis.readByte();System.out.print(value + " ");}System.out.println();dis.mark(25); // Mark position 3 (limit = 25bytes)// Should print "3 4 5 "for(int i = 0; i < 3; i++){value = dis.readByte();System.out.print(value + " ");}System.out.println();dis.reset();// Should print "3 4 5 " and NOT "6 7 8 "for(int i = 0; i < 3; i++){value = dis.readByte();System.out.print(value + " ");}System.out.println();dis.close();}catch(Exception e){System.err.println(e);}}public void pauseApp() {}public void destroyApp(boolean b) {}}