int paj = 0;       
        String psn =txtNama.getText();              
        psn = psn.substring(0, 5);
        JOptionPane.showMessageDialog(this, psn   ,"Perhatian .....",JOptionPane.INFORMATION_MESSAGE);
        paj = psn.length();   
        if(paj > 4){
            JOptionPane.showMessageDialog(this, paj   ,"Perhatian .....",JOptionPane.INFORMATION_MESSAGE);
        }