Sending a string across a network

hi java friends!
i am a pretty good programmer but i know nothing about java and networking
for a final project for AP Computer science i would like to make a network gamed. If i can get the basic code for sending a string across the network i can figure out the rest.
SOOOOOOO
my question is, can someone give me the code, or at least point me on the way to sending a string across a network?
Thanks

See http://java.sun.com/docs/books/tutorial/networking/index.html

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package emsc.oracle.apps.emscper.sfapi.proxy;
import HTTPClient.HTTPConnection;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.IsValidSession;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.IsValidSessionResponse;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.Login;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.LoginResponse;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.LoginResult;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.Logout;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.LogoutResponse;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.SFCredential;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.SFParameter;
import emsc.oracle.apps.emscper.sfapi.proxy.types.sfobject_sfapi_successfactors_com.Error;
import java.io.File;
import javax.xml.rpc.ServiceFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.Date;
import javax.xml.ws.BindingProvider;
import javax.xml.soap.SOAPException;
import java.util.Map;
import oracle.security.ssl.OracleSSLCredential;
public class SFAPITest {
    // Declare members:
    private String companyId;
    private String userName;
    private String password;
    private String developerKey;
    private Date   effDt;
    private String greaterThanEffDt;
    private String lessThanEffDt;
    // Declare constants:
    final static private String breakLine = "+---------------------------------------------------------------------------+";
    final static private String format    = "yyyy-mm-dd";
    private enum ReqId {
        PrimaryReq(25),
        PrimaryReqCEO(26),
        EmCarePrimary(27),
        RTI(28),
        EmCareClinical(29);
        private int reqId;
        private ReqId() {
        private ReqId(int value) {
            reqId = value;
        public int getReqId() {
            return reqId;
    // Getters and Setters:
    protected String getCompanyId() {
       return this.companyId;
    protected void setCompanyId(String value) {
       this.companyId = value;
    protected String getUserName() {
       return this.userName;
    protected void setUserName(String value) {
       this.userName = value;
    protected String getPassword() {
       return this.password;
    protected void setPassword(String value) {
       this.password = value;
    protected String getDeveloperKey() {
       return this.developerKey;
    protected void setDeveloperKey(String value) {
       this.developerKey = value;
    protected Date getEffDt() {
        return this.effDt;
    protected void setEffDt(Date value) {
        this.effDt = value;
    protected String getGreaterThanEffDt() {
       return this.greaterThanEffDt;
    protected void setGreaterThanEffDt(String value) {
       this.greaterThanEffDt = value;
    protected String getLessThanEffDt() {
       return this.lessThanEffDt;
    protected void setLessThanEffDt(String value) {
       this.lessThanEffDt = value;
    public void runProgram()
        SFAPIService mySFAPIService;
        String CompletionText = "";
        String effDtStr2 = null;
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    * Use getJDBCConnection method to get the connection object for any
    * JDBC operations.
    * Use CpContext provided commit,rollback methods to commit/rollback
    * data base transactions.
    * Don't forget to release the connection before returning from this
    * method.
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    * completion text.
    * Status values are ReqCompletion.NORMAL,ReqCompletion.WARNING,
    * ReqCompletion.ERROR.
    * Use Completion text message of length 240 characters. If it is more
    * than 240 then full string will appear in log file and truncated 240
    * characters will be used as request completion text.
    try
        ServiceFactory factory = ServiceFactory.newInstance();
        mySFAPIService = (emsc.oracle.apps.emscper.sfapi.proxy.SFAPIService)factory.loadService(emsc.oracle.apps.emscper.sfapi.proxy.SFAPIService.class);
        SFAPI api = mySFAPIService.getSFAPI();
       /// SFAPI api = new SFAPI();
        //Map<String, Object> requestContext = ((BindingProvider) api).getRequestContext();
        //requestContext.put(BindingProvider.SESSION_MAINTAIN_PROPERTY, true);
        System.out.println("ServiceName => " + mySFAPIService.getServiceName().toString());
        System.out.println("End Point   => " + mySFAPIService.getServiceName().toString());
        System.out.println(breakLine);
        // Authentication: Login to SFAPI:
        SFCredential credential = new SFCredential();
        // Fake credentials being passed in for this post:
        credential.setCompanyId("XXX");
        credential.setUsername("XXX");
        credential.setPassword("XXX");
        credential.setDeveloperKey("XXX");
        HTTPConnection httpsConnection = null;
        OracleSSLCredential _credential = new OracleSSLCredential();
        _credential.setWallet("\\\\\\C:\\Program Files\\Java\\jdk1.6.0_33\\jre\\lib\\security", "ParkEstes3");
        /*System.setProperty("javax.net.ssl.trustStore","C:\\\\\OraHome_1\\jdev\\jdevbin\\jdk\\jre\\lib\\security\\keystore");
        System.setProperty("javax.net.ssl.trustStorePassword","changeit");
        System.out.println(System.getProperty("javax.net.ssl.trustStore"));*/
        // SFParameter: Define a generic SFParameter List. This is a necessary parameter
        // to invoking calls in SFAPI:
         /*System.setProperty("javax.net.ssl.keyStore",
         "file:\\\C:\\jdk1.4.1\\jre\\lib\\security\\client.keystore");
         System.setProperty("javax.net.ssl.keyStorePassword","welcome");         */
        /* System.setProperty("oracle.net.wallet_location",
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        File kstore = new File("C:\\OraHome_1\\jdev\\jdevbin\\jdk\\jre\\lib\\security\\jssecacerts");
        boolean exists = kstore.exists();
        if (!exists) {
            System.out.println("Keystore does not exist");
        else {
            System.out.println("Keystore does exist");
        System.setProperty("javax.net.ssl.trustStore", kstore.getAbsolutePath());
        System.setProperty("javax.net.ssl.trustStorePassword", "changeit");
        //System.setProperty("proxySet", "false");
        //System.setProperty("http.proxyHost", "127.0.0.1");
        //System.setProperty("http.proxyPort", "8080");
        System.out.println(kstore.getAbsolutePath());
        List<SFParameter> lst = new ArrayList<SFParameter>();
        SFParameter param = new SFParameter();
        param.setName("");
        param.setValue("");
        lst.add(param);
        SFParameter[] sfParam = lst.toArray(new SFParameter[lst.size()]);
        Login login = new Login();
        try {
            login.setCredential(credential);
            System.out.println("1");
            login.setParam(sfParam);
            System.out.println("2");
            LoginResponse loginResponse = new LoginResponse();
            LoginResult loginResult = new LoginResult();
            try {
                 loginResponse = api.login(login);
            catch (Exception e ) {
                System.out.println(e.getMessage());
            System.out.println("3");
            try {
                 loginResult = loginResponse.getResult();
            catch (Exception e ) {
                System.out.println(e.getMessage());
            System.out.println("4");
            IsValidSession vs = new IsValidSession();
            IsValidSessionResponse isValidSessionResponse = api.isValidSession(vs);
            System.out.println("5");
            if (isValidSessionResponse.isResult()) {
                 System.out.println("Session is valid");
                 System.out.println("Result => " + loginResult.getSessionId());
                 System.out.println(breakLine);
                Logout logout = new Logout();
                LogoutResponse logoutResponse = api.logout(logout);
                if (logoutResponse.isResult()) {
                     System.out.println("Logout of SFAPI Successful");
                else {
                    System.out.println("Logout of SFAPI Unsuccessful");
            else {
                 System.out.println("Session is invalid");
                List<Error> errors = new ArrayList<Error>();
                for (int i = 0; i < loginResult.getError().length; i++) {
                    errors.add(loginResult.getError()[i]);
                for (int i = 0; i < errors.size(); i++) {
                     System.out.println("Error Indice   => " + i);
                     System.out.println("Error Code:    => " + errors.get(i).getErrorCode());
                     System.out.println("Error Message: => " + errors.get(i).getErrorMessage());
                     System.out.println(breakLine);
                } // end for loop of SFObject errors
            } // end InvalidSession
        catch (Exception e)
             System.out.println("Session Credential Exception");
             System.out.println("Exception => " + e.getMessage());
             System.out.println(breakLine);
    catch (Exception e)
        System.out.println("Parameter List Exception");
        System.out.println("Exception => " + e.getMessage());
        System.out.println(breakLine);
    }   // end runProgram
    // Constructor:
    public SFAPITest() {
    } // end constructor
    public static void main (String args[]) {
        try
            SFAPITest test = new SFAPITest();
            test.runProgram();
        catch (Exception e) {
            System.out.println("main exception => " + e.getMessage());
} // SFAPITest
Here is the output with trace:
WARNING: Unable to connect to URL: https://api4.successfactors.com:443/sfapi/v1/soap due to java.security.PrivilegedActionException: javax.xml.soap.SOAPException: Message send failed: String index out of range: -7
Session Credential Exception
Exception => ; nested exception is:
    HTTP transport error: javax.xml.soap.SOAPException: java.security.PrivilegedActionException: javax.xml.soap.SOAPException: Message send failed: String index out of range: -7
+---------------------------------------------------------------------------+
Process exited with exit code 0.

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