String params = "Test"
InputStream is =    new  ObjectInputStream(
		 	         new  ByteArrayInputStream(params.getBytes("UTF-8")));
 

java.io.StreamCorruptedException: invalid stream header
	at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
	at java.io.ObjectInputStream.<init>(Unknown Source)
	at MyClass.method(ScannerApplet.java: 193 )
	at MyClass.main(ScannerApplet.java: 67 )

String  params="Ssssssssssssssssss";

 byte  bytes[] =  new   byte [( int ) params.length()];
params.getBytes( 0 ,params.length(),bytes, 0 );
	 InputStream is =    new  ObjectInputStream(
		 	         new  ByteArrayInputStream(bytes));

String str = "asdasdasdygasdgfasfksjgfaksjdghakjgfajkf aasdfasdfasdf";
InputStream is =  new  ByteArrayInputStream(str.getBytes());