intent - Multiple Activity - Moving from activity to another one

Android-MultipleActivity.java

//  Defining the second activity for moving to.
Intent intent = new Intent(getApplicationContext(), SecondActivity.class);
//  putting and extra into an intent so that on the other activity could be recieved.
intent.putExtra("editText", editText.getText().toString());
//  Starting the second activity
startActivity(intent);

//  On the Second Activity: how te recieve the intent that opened this activity.
Intent intent=getIntent();
//  How to extract the extra that has been put in the intent before starting the activity.
intent.getStringExtra("editText");