How to Map System.out and System.in to SWT control

I am working on on a tool to connect to a remote server using jcraft.JSch (ssh to Unix server) and return the output and display its output. The script works fine when channel input outputs are System.in and System.out. But when I try with SWT controls, it is not able to

display the exact output I am getting with System.out

read from SWT Text control emulating System.in

public void create() {

dialogShell = new Shell(dialogShell, SWT.PRIMARY_MODAL | SWT.SHEET | SWT.RESIZE);
GridLayout gridLayout = new GridLayout();
gridLayout.numColumns = 2;
dialogShell.setLayout(gridLayout);
final Text logText = new Text(dialogShell, SWT.MULTI | SWT.BORDER| SWT.READ_ONLY);
GridData gridData0 = new GridData(GridData.FILL,GridData.FILL, true, true);
gridData0.horizontalSpan = 2;
logText.setLayoutData(gridData0);

origOutPS = System.out;
origErrPS = System.err;


final Text cmdText = new Text(dialogShell, SWT.BORDER | SWT.V_SCROLL);
final Button RunButton = new Button(dialogShell, SWT.PUSH);
GridData gridDatal = new GridData(GridData.BEGINNING, GridData.FILL_HORIZONTAL, true,false);
GridData gridData2 = new GridData(GridData.END, GridData.CENTER, false,false);
cmdText.setLayoutData(gridDatal);
RunButton.setLayoutData(gridData2);
RunButton.setText("Execute");
RunButton.addSelectionListener(new runButton(dialogShell,cmdText));

dialogShell.setDefaultButton(RunButton);
dialogShell.setSize(550, 250);
dialogShell.setText("Processing....");

OutputStream out = new OutputStream() {
    public void write(int b) throws IOException {
        logText.append(String.valueOf((char) b));
    }

    public void write(byte[] b,int off, int len) {
        logText.append(new String(b, off, len));
    }
};
PrintStream ps = new PrintStream(out,true);
System.out.println("Passing the control!");
System.setOut(ps);
System.setErr(ps);


InputStream in = new InputStream() {
    @Override
    public int read() throws IOException {
        String str = cmdText.getText();
        int pos = 0;
        //test if the available input has reached its end
        //and the EOS should be returned 
        if( str != null && pos == str.length()){
            str =null;
            //this is supposed to return -1 on "end of stream"
            //but I'm having a hard time locating the constant
            return java.io.StreamTokenizer.TT_EOF;
        }
        //no input available, block until more is available because that's
        //the behavior specified in the Javadocs
        while (str == null || pos >= str.length()) {
            try {
                //according to the docs read() should block until new input is available
                synchronized (this) {
                    this.wait();
                }
            } catch (InterruptedException ex) {
                ex.printStackTrace();
            }
        }
        //read an additional character, return it and increment the index
        return str.charAt(pos++);
    }
};
System.setIn(in);

dialogShell.addListener(SWT.Close, new closelistener());

//dialogShell.addShellListener(new MyshellAdapter(logText,cmdText,RunButton));
dialogShell.open();
}

Above is the dialog and this is the output I am getting