title: what is the use of keyword final?
body: <p>In the below code if i remove the keyword final from EditText i am an getting error in the line (6) where i pass EditText object (et) to the intent...I have to knw the significance of final keyword here...</p>
  
  <pre><code>final EditText et=(EditText)findViewById(R.id.t);
          Button b=(Button)findViewById(R.id.b1);
          b.setOnClickListener(new Button.OnClickListener(){
              public void onClick(View v)&lt;br&gt;
              {
              Intent on=new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+et.getText()));
              startActivity(on);
              }
          });
  </code></pre>