what does realy it work ? class Config.java
i don't understand what it work and what is the content of din in DataInputStream din= new DataInputStream( bin);
and content of dout in DataOutputStream dout= new DataOutputStream( bout);
import java.io.*;
import java.util.*;
public class Config
{
private String pathPrefix;
public String local_data_port;
public Vector targets;
public String media_locator;
public Config()
{
pathPrefix= System.getProperty( "user.home") + File.separator;
read();
}
public void read() {
targets= new Vector();
try {
String path= pathPrefix + "xmit.dat";
FileInputStream fin= new FileInputStream( path);
BufferedInputStream bin= new BufferedInputStream( fin);
DataInputStream din= new DataInputStream( bin);
local_data_port= readString( din);
int n_targets= din.readInt();
for( int i= 0; i < n_targets; i++) {
String ip= readString( din);
String port= readString( din);
targets.addElement( new Target( local_data_port, ip, port));
}
media_locator= readString( din);
fin.close();
} catch( IOException e) {
System.out.println( "xmit.dat file missing!");
local_data_port= "";
media_locator= "";
}
}
public void write() {
try {
String path= pathPrefix + "xmit.dat";
FileOutputStream fout= new FileOutputStream( path);
BufferedOutputStream bout= new BufferedOutputStream( fout);
DataOutputStream dout= new DataOutputStream( bout);
writeString( dout, local_data_port);
dout.writeInt( targets.size());
for( int i= 0; i < targets.size(); i++) {
Target target= (Target) targets.elementAt( i);
writeString( dout, target.ip);
writeString( dout, target.port);
}
writeString( dout, media_locator);
dout.flush();
dout.close();
fout.close();
} catch( IOException e) {
System.out.println( "Error writing xmit.dat!");
}
}
public String readString( DataInputStream din) {
String s= null;
try {
short length= din.readShort();
if( length > 0) {
byte buf[]= new byte[ length];
din.read( buf, 0, length);
s= new String( buf);
}
} catch( IOException e) {
System.err.println( e);
}
return s;
}
public void writeString( DataOutputStream dout, String str) {
try {
if( str != null) {
dout.writeShort( str.length());
dout.writeBytes( str);
} else {
dout.writeShort( 0);
}
} catch( Exception e) {
e.printStackTrace();
}
}
public void addTarget( String ip, String port) {
targets.addElement( new Target( "", ip, port));
}
}
anyone who knows it please specify it clearlly
thank you
