Objectinputstream and obejctoutputstream

Objectinputstream and obejctoutputstream support serialization of basic data and objects.

Objectoutputstream provides persistent storage for "Basic Data Objects". objectinputstream provides read for "Basic Data Objects.

Public class objectstreamtest {Private Static final string Path = "d :\\ baiduyun \ filetest \ rrr.txt"; public static void main (string [] ARGs) throws exception {testwrite (); testread ();} public static void testwrite () throws filenotfoundexception, ioexception {objectoutputstream out = new objectoutputstream (New fileoutputstream (new file (PATH ))); out. writeboolean (true); out. writebyte (byte) 65); out. writechar ('A'); out. writeint (0, 20131015); out. writefloat (3.14f); out. writedouble (1.414d); // write the hashmap object hashmap map = new hashmap (); map. put ("one", "Red"); map. put ("two", "green"); map. put ("three", "blue"); out. writeobject (MAP); // write the custom box object. Box implements the serializable Interface Box = new box ("desk", 80, 48); out. writeobject (box); out. close ();} public static void testread () throws filenotfoundexception, ioexception, classnotfoundexception {objectinputstream in = new objectinputstream (New fileinputstream (PATH); system. out. printf ("Boolean: % B \ n", in. readboolean (); system. out. printf ("Byte: % d \ n", (IN. readbyte () & 0xff); system. out. printf ("char: % C \ n", in. readchar (); system. out. printf ("int: % d \ n", in. readint (); system. out. printf ("float: % F \ n", in. readfloat (); system. out. printf ("Double: % F \ n", in. readdouble (); // read the hashmap object hashmap map = (hashmap) in. readobject (); iterator iter = map. entryset (). iterator (); While (ITER. hasnext () {map. entry entry = (map. entry) ITER. next (); system. out. printf ("%-6 s -- % s \ n", entry. getkey (), entry. getvalue ();} // read the box object. Box implements the serializable Interface Box = (box) in. readobject (); system. out. println ("box:" + box); In. close ();} static class box implements serializable {private int width; private int height; private string name; public box (string name, int width, int height) {This. name = Name; this. width = width; this. height = height;} @ override Public String tostring () {return "[" + name + ": (" + width + "," + height + ")] ";}}}

 

Objectinputstream and obejctoutputstream