Thread: Error connecting to Unix and running script from Java code

I get the following error when trying to run code. Please help.

java.lang.NullPointerException
at conntecttoDB8.SSHCommandExecutor.main(SSHCommandEx ecutor.java:26)

package conntecttoDB8;
import java.io.InputStream;
 
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
 
 
public class SSHCommandExecutor {
 
    /**
     * @param args
     */
    public static void main(String[] args) {
    	//String host="xxxxxxxxxxxxxx";
    	String host="xxxxxxxxxxxxxxx";
		String user="xxxxxxxxxxxxx";
		String password="xxxxxxxxxxxx";
		String command1="ls -ltr";
        try{
 
            java.util.Properties config = new java.util.Properties(); 
            config.put("StrictHostKeyChecking", "no");
            JSch jsch = new JSch();
            Session session=jsch.getSession(user, host, 22);
            session.setPassword(password);
            session.setConfig(config);
            session.connect();
            System.out.println("Connected"); 
            Channel channel=session.openChannel("exec");
            channel.setCommand(command1);
            channel.setInputStream(null);
            channel.setInputStream(System.err);
 
            InputStream in=channel.getInputStream();
            channel.connect();
            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()){
                System.out.println("exit-status: "+channel.getExitStatus());
                break;
              }
              try{Thread.sleep(1000);}catch(Exception ee){}
            }
            channel.disconnect();
            session.disconnect();
            System.out.println("DONE");
        }catch(Exception e){
            e.printStackTrace();
        } finally {
		}
 
    }
 
}
 
package com.jcraft.jsch;
 
import java.util.Properties;
 
public class Session {
 
	public void connect() {
 
 
	}
 
	public Channel openChannel(String string) {
		return null;
 
 
	}
 
	public void setConfig(Properties config) {
 
 
	}
 
	public void setPassword(String password) {
 
	}
 
	public void disconnect() {
 
	}
 
}
 
package com.jcraft.jsch;
 
import java.io.PrintStream;
 
public class ChannelExec {
 
	public void setCommand(String command1) {
 
 
	}
 
	public void setErrStream(PrintStream err) {
 
 
	}
 
}
 
package com.jcraft.jsch;
 
import java.io.InputStream;
 
public class Channel {
 
	public void setInputStream(Object object) {
 
 
	}
 
	public InputStream getInputStream() {
 
		return null;
	}
 
	public void connect() {
 
 
	}
 
	public boolean isClosed() {
 
		return false;
	}
 
	public String getExitStatus() {
 
		return null;
	}
 
	public void disconnect() {
 
 
	}
 
	public void setCommand(String command1) {
 
 
	}
 
}

Thanks,

I did ask suggested and all variables prior have values.

line d6 session.setPassword(password);

It is the session value that is null