how to use jsch codeto run commands on remote unix server without giving password?

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I have used jcraft to connect to a remote server and execute commands and it is working too.But I am giving the user credentials and connecting to server.Is it possible to connect to the server without giving the password?

I have tried using this code:

    import com.jcraft.jsch.*;
    import com.jcraft.jsch.Channel;
    import com.jcraft.jsch.JSch.*;
    import com.jcraft.jsch.Session;
    import com.jcraft.jsch.UserInfo;
    import java.io.*;

    public class testrad 
    {public static void main(String args[])
    {
String user="uname";
String host="hostname";
String cmd="sh rdh_count.sh r10040";
JSch jsch = new JSch();
try
{   
    Session session=jsch.getSession(user,host,22);
    session.setPassword("psw"); 
    UserInfo usrInfo=new MyUserInfo();
    session.setUserInfo(usrInfo);
    session.connect();
    Channel channel=session.openChannel("exec");
    ((ChannelExec) channel).setCommand(cmd);
    channel.setXForwarding(true);
    InputStream in = channel.getInputStream();
    channel.connect();
    channel.setInputStream(System.in);
    byte[] tmp = new byte[1024];
    while (true)
    {
        while (in.available() > 0)
        {
            int i = in.read(tmp, 0, 1024);
            if (i < 0)
            break;
            System.out.print(new String(tmp, 0, i));
        }
        if (channel.isClosed())
        {
            in.close();
            break;
        }
        try
        {
            Thread.sleep(1000);}
            catch (Exception ee)
            {
            }
        }
    channel.disconnect();
    session.disconnect();
    }
             catch(Exception e)
          {
e.printStackTrace();
System.out.println("Exception"+e);
   }

} public static class MyUserInfo implements UserInfo { public String getPassword() { return "password"; } public String getPassphrase() {

return ""; } public boolean promptPassword(String arg0) { return true; } public boolean promptPassphrase(String arg0) { return true; } public boolean promptYesNo(String arg0) { return true; } public void showMessage(String arg0) { } } }

asked 55 secs ago

user1795999

49