Apps Logcat displays squares instead of letters

[Stam44]

I am testing LogCat and run the code:

private static final String Debug_Tag= "MyFirstAndroidApp";

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.i(Debug_Tag, "Info about My First AndroidApp");

forceError();

}

public void forceError(){
if(true)
throw new Error ("Whoops");
}


I cannot understand why on earth LogCat displays square characters instead of letter characters like [] [] [] [] []. Can anyone help on that?